期刊文献+
共找到31篇文章
< 1 2 >
每页显示 20 50 100
Evaluation and Empirical Research on Teachers’ Information Literacy in the Context of Smart Education
1
作者 Chenyue Hu 《Journal of Contemporary Educational Research》 2024年第3期211-220,共10页
The development of smart education has led to the integration of emerging technologies such as artificial intelligence with education.It is a prerequisite for teachers to have high information literacy for conducting ... The development of smart education has led to the integration of emerging technologies such as artificial intelligence with education.It is a prerequisite for teachers to have high information literacy for conducting education and teaching work.This study conducted a questionnaire survey on 412 teachers in a certain area.The results showed that teachers’information literacy is above the middle level,and there are significant differences in information literacy between teaching experience and educational background.The evaluation showed that information ethics,information awareness,and information application have a significant positive impact on professional development,and information knowledge and information awareness have a positive predictive effect on information ethics. 展开更多
关键词 Teachers’information literacy Smart education empirical research
下载PDF
The Empirical Research of Native Thinking in the Process of English Composition
2
作者 耿娟娟 贾颖 《疯狂英语(理论版)》 2016年第3期185-186,182,共3页
The method of questionnaire is employed to investigate the impact of Chinese thinking in the writing processes of 80 college English majors.It reveals that the English writing process is a bilingual event(namely,Engli... The method of questionnaire is employed to investigate the impact of Chinese thinking in the writing processes of 80 college English majors.It reveals that the English writing process is a bilingual event(namely,English writers have both Chinese and English at their disposal when they are composing in English).And no matter whether the English proficiency of the learners is high or low,the learners have a great dependence on Chinese thinking in the process of English writing.In the categories of task reacting and content organizing,there is no great difference between the high and low English proficiency students.But in the category of linguistic form,the influence of Chinese thinking on the low level students is far greater than the high level students. 展开更多
关键词 native thinking WRITING task reacting content organizing linguistic form empirical research
下载PDF
An Empirical Research on Integrating Chinese Traditional Culture into College English Teaching
3
作者 时俊霞 《海外英语》 2017年第21期230-231,共2页
198 non-English freshmen students from Shandong Yingcai College were selected as research subjects.The subjects were divided into the experimental group(EG) and the control group(CG).The students in EG were taught Eng... 198 non-English freshmen students from Shandong Yingcai College were selected as research subjects.The subjects were divided into the experimental group(EG) and the control group(CG).The students in EG were taught English integrated Chinese traditional culture for three semesters,while the ones in CG were taught as usual.The results indicate that the integration of Chinese culture broadens the students' horizons and improves the students' ability to express Chinese culture in English and intercultural communicative competence. 展开更多
关键词 Chinese culture College English teaching English expressive ability empirical research
下载PDF
An empirical research on the determinants of Chinese college students' carbon label cognition and interpersonal communication willingness 被引量:1
4
作者 Chao Liu Kairong Xiong +2 位作者 Weiwei Wang Ting Zhang Jiamei Tang 《Chinese Journal of Population,Resources and Environment》 2016年第4期309-318,共10页
Carbon labels are innovative medium and tools for climate change communication and lowcarbon marketing.This study aims at examining how college students are aware of low-carbon and carbon labels,whether they are more ... Carbon labels are innovative medium and tools for climate change communication and lowcarbon marketing.This study aims at examining how college students are aware of low-carbon and carbon labels,whether they are more willing to communicate low-carbon ideas,and also the determinants affecting their interpersonal communication of carbon labels.The multiple regression analysis shows that Chinese college students' willingness of interpersonal communication of carbon labels are significantly influenced by their awareness of climate change crisis,the perceived value of carbon labels,the consideration of product environmental attributes,the preferences of carbon labels,the household background,and their educational background.In response to these factors,this paper proposes,in a public perspective,the strategies to enhance the dissemination of carbon labels. 展开更多
关键词 empirical research college students' carbon label
下载PDF
An empirical research on strategic planning in public libraries of China's Mainland 被引量:1
5
作者 Ping KE Yingfang HE +2 位作者 Wenliang ZHANG Dongqin JIA Tinghan LI 《Chinese Journal of Library and Information Science》 2012年第1期1-14,共14页
Purpose: As an important issue, strategic planning in public libraries has been paid more attention in China recent years. However, a comprehensive and systematic research, especially strategic models based on empiric... Purpose: As an important issue, strategic planning in public libraries has been paid more attention in China recent years. However, a comprehensive and systematic research, especially strategic models based on empirical studies, is required in the public library strategic planning. The purpose of this research is to investigate the current practices and propose an appropriate reference and guidance of strategic planning in public libraries in China’s mainland.Design/methodology/approach: A questionnaire-based survey method is carried out to collect the views of public libraries staff at different levels in China’s mainland. The questionnaire is designed on the following four aspects toward strategic planning in public libraries: The attitude, the status quo, basic issues and the guides. The 882 valid questionnaires are processed by a statistic analysis to reflect the current practices of strategic planning in public libraries in China’s mainland.Findings: Our research results reveal that the unclear and confused understanding of the strategic planning still exist among the public libraries staff in China’s mainland. However, the majority of respondents still believe that the strategic planning in public libraries is significant and the library developments will be affected for lacking strategic planning. Moreover, it is considerable that the strategic plans are jointly made by independent agencies and public libraries, or by the public library itself. Also, guidelines and a set of softwares in strategic planning are needed.Research limitations/implications: The study was restricted to six main areas in China. A wider geographic sampling can preferable show the basic status of strategic planning in public libraries.The procedures of data collection would be another limitation. Nevertheless, case studies should be used in the further research.Originality: The importance of this research originates from a large number of first-hand data about strategic planning in public libraries in China’s mainland. The results provide extra perception into the future development of Chinese public libraries. The understanding obtained from this study will play a part in forthcoming evolution of this area of research. 展开更多
关键词 Public library Strategic planning Library strategy Library management empirical research
下载PDF
Sustainable Development of Export: Theoretical Meaning, Evaluation Model, and Empirical Research
6
作者 Zhou Nianli 《Chinese Journal of Population,Resources and Environment》 北大核心 2008年第4期20-27,共8页
With the effect of the human trade doctrine in the international trade field, almost all the countries have paid more attention to the sustainable development of international trade. This article chose the export sust... With the effect of the human trade doctrine in the international trade field, almost all the countries have paid more attention to the sustainable development of international trade. This article chose the export sustainable development as the research object. On the basis of the analysis of the theoretical connotation of the export sustainable development, this article tried to establish an evaluation indices system and set up an evaluation model of the export sustainable development level, and finally made some empirical research on China. The result indicates that the comprehensive level of the export sustainable development in China showed a tendency to rise from 1985 to 2003 and the export sustainable development level of China in these years can be divided into four grades: excellent, good, moderate and poor. In most years, the social economic benefits of export was obtained at the cost of the deterioration of environment and the depletion of resources, and the economic profit of export did not increase with the enlargement of the export scale because of the deterioration of the terms of trade. Therefore, China should be careful about the problem of poverty accompanied by the increase of export. 展开更多
关键词 export sustainable development grey correlation grey cluster empirical research
下载PDF
Empirical Research on Sticky Cost in Strategic Emerging Industries
7
作者 Zhangxin Wu Yuewen Li 《International English Education Research》 2015年第3期78-80,共3页
Cost Stickiness theory believe that costs do not linearly change with the volume ofbusiness, when business increased it increases more cost than when business volume decreased by the same amount it reduces. Use sticky... Cost Stickiness theory believe that costs do not linearly change with the volume ofbusiness, when business increased it increases more cost than when business volume decreased by the same amount it reduces. Use sticky cost theory to the process of cost management can improve the efficiency of enterprises' cost plan and cost control. The national twelith five year plan proposed to vigorously develop strategic emerging industries, if the strategic emerging industry also has the cost stickiness, we can apply sticky cost theory to the process its cost management. The author selected 120 listing corporations' financial data in China during 2007-2012 belongs to the emerging industries. Through empirical study, we found that the strategic emerging industry does not exist sticky cost beheavior. This may because China's strategic emerging industrie is still in the initial reason. 展开更多
关键词 strategic emerging industry sticky cost listed cost empirical research
下载PDF
Cost Climate Survey Scale in Construction:Development and Empirical Research
8
作者 HE Wei CHEN Song 《Journal of Donghua University(English Edition)》 EI CAS 2018年第3期220-227,共8页
To develop the cost climate survey scale( CCSS) used in construction enterprises,the design concepts,principles and the process diagrams of CCSS are proposed.Through questionnaire investigation and expert interviews,3... To develop the cost climate survey scale( CCSS) used in construction enterprises,the design concepts,principles and the process diagrams of CCSS are proposed.Through questionnaire investigation and expert interviews,314 projects are established and the CCSS that is made up of 7 dimensions framework and 30 levels is preliminarily determined.After categorized merger,pre-test analysis and multiple items refining,16 projects of CCSS are eventually compiled.In order to verify the credibility and validity of the CCSS,200 employees in Qinhuangdao construction company as the samples are tested.SPSS 21.0 is used to analyze the reliability,validity and rationality of level divisions,and Amos 22.0 is for analyzing the degree of model adaptation in this survey.Finally,the current cost climate situation of the construction site in the company is evaluated,the deficiencies of the cost culture of the construction site are pointed out.This study shows that strengthening the cost knowledge training has a significant positive effect on the cost climate cognition of the employees.Nevertheless,accumulation of work experience has a dual impact on that.The CCSS is not only an important foundation for the cost climate research and its theoretical development,but also the premise of the cost climate quantitative research.An appropriate CCSS,to some extent,can reflect the cognitive level of all kinds of employees in one enterprise and cost savings degree of the enterprise in a certain time.The development of CCSS reflects the originality and interactivity,and fills a blank of the CCSS in construction,which is considered to be an effective tool for cost climate research in construction. 展开更多
关键词 cost climate scale development reliability validity empirical research
下载PDF
DEA-based Empirical Research on the Performance Analysis of China's Commercial Bank Information Security System Application
9
作者 Xinghua LU 《International Journal of Technology Management》 2013年第6期35-38,共4页
In this paper, the operating performances of the main commercial banks' information security management system applications are empirically researched using the DEA method of operating efficiency's multi-stage super... In this paper, the operating performances of the main commercial banks' information security management system applications are empirically researched using the DEA method of operating efficiency's multi-stage super efficiency. The DEA model of multi-stage super efficiency is established for the commercial bank information security system applications of China's banks using data envelopment analysis (DEA), and then output efficiency, taxation efficiency, and comprehensive efficiency are analyzed by choosing eight banks such as Industrial and Commercial bank of China as sample data, and finally the operating performance of Chinese commercial banks' information security management system is concluded. 展开更多
关键词 DEA Operating Performance empirical research
下载PDF
Empirical Research of Complex Adaptive Blended Learning in English Intensive Reading Teaching
10
作者 刘培栋 《海外英语》 2021年第11期293-296,共4页
This research intends to employ Complex Adaptive Blended Learning(CABL)in English Intensive Reading teaching.This empirical research tries to work out what is Complex Adaptive Blended Learning Literature review,Defini... This research intends to employ Complex Adaptive Blended Learning(CABL)in English Intensive Reading teaching.This empirical research tries to work out what is Complex Adaptive Blended Learning Literature review,Definition of blended learning.It would further analyze the core concepts and framework of CABL and discuss the principles of CABL.This empirical study of Complex Adaptive Blended Learning in English Intensive Reading Teaching would be conducted on the Super-star Learning Management System(SLMS).The activities designed in the Complex Adaptive Blended Learning would be analyzed and how they work before class,in class,and after class would be described.The Complex Adaptive Blended Learning not only offers a platform for students to develop their potential in English Intensive Reading class,but also facilitates the data collection for the teachers in their teaching research. 展开更多
关键词 CABL core concept FRAMEWORK PRINCIPLES empirical research
下载PDF
An Empirical Research on the Evolution Model of Competitiveness Between Different Life Cycle Stages in Chinese Enterprises
11
作者 Xiaohong Chen Yu Cao Yueru Ma 《Journal of Systems Science and Information》 2008年第4期351-370,共20页
The characteristic of enterprise competitiveness is different between different life cycle stages. In this paper we surveyed the enterprise competitiveness's differences in various stages of the life cycle and the ev... The characteristic of enterprise competitiveness is different between different life cycle stages. In this paper we surveyed the enterprise competitiveness's differences in various stages of the life cycle and the evolution model of three aspects of enterprise com- petitiveness as resource, capability and dynamic capability by questionnaire survey. The result shows that there are significant differences between different life cycle stages of en- terprise competitiveness in China. The enterprise competitiveness is stronger and stronger during the periods from the enterprise's birth to maturity, while in the enterprise's recession period the competitiveness becomes much weaker. The competitiveness's constitutive features in each stage are as follows: in the enterprise's born stage the enterprise is lack of resources and its competition mainly relies on the ability; in the enterprise's growth stage the enterprise's resources become richer and are as important as enterprise's ability in the constitution of enterprise competitiveness; in the maturity stage the enterprise's people, money and material resources all become very rich but the role of capability in enterprise competitiveness begins to decrease; in the enterprise's recession stage the en- terprise resources begin to exhaust, and the enterprise's competitiveness returns to rely on capability, and in this period the enterprise's learning ability, innovation ability and dynamic mechanisms perform worst, which will affect the enterprise's revival and lead to the ultimate death of enterprise. These conclusions have great value for reference to the enterprise's competitive strategy making for different life cycle stages. 展开更多
关键词 enterprise competitiveness evolution model empirical research life cycle
原文传递
On Chinese empirical accounting research
12
作者 ZHANG Wen-xian MAO Yu 《Journal of Modern Accounting and Auditing》 2007年第4期1-6,共6页
This paper reviews and analyzes the achievements of Chinese empirical accounting research during more than ten years. The development of Chinese empirical accounting research can be divided into three phases. Each pha... This paper reviews and analyzes the achievements of Chinese empirical accounting research during more than ten years. The development of Chinese empirical accounting research can be divided into three phases. Each phase has its different characteristics. The fields of Chinese empirical accounting research include: the efficient market, the choice of accounting policies, financial crisis warning, stock dividend policy, earnings management, capital structure, auditing opinions, asset reorganization and merger, international accounting harmonization. This paper tries to analyze some basic essential factors of Chinese empirical accounting research such as hypothesis, sample and data, methods, conclusion and so on. We find that it is necessary to strengthen empirical accounting research in order to make up the shortcomings of traditional normative research. However, the current research has some limitations. (1) Some Chinese empirical accounting articles directly select samples and data to test without literature reviews, theory analysis and hypothesis; (2) The time of selected samples is shot; (3) Some articles utilize variables to represent certain concepts; (4) Most of the models are literary models; (5) Some researches focus on model and fix quantify, sometimes neglect some factors; (6) Most researches lack great findings, some conclusions are even opposite. 展开更多
关键词 empirical accounting research research conclusion CHINESE
下载PDF
Comprehensive Evaluation of Talent Training Model for Modern Rehabilitation Therapy Technology:A Case Study of School Y
13
作者 Wei Yan Chunxia Hu +1 位作者 Surui Zhao Chen Wang 《Journal of Contemporary Educational Research》 2024年第7期24-29,共6页
The purpose of this study is to comprehensively evaluate the modern training model of rehabilitation therapy technology talents.Selecting the third-year students of the rehabilitation therapy technology program in Sch... The purpose of this study is to comprehensively evaluate the modern training model of rehabilitation therapy technology talents.Selecting the third-year students of the rehabilitation therapy technology program in School Y as the research subject,300 questionnaires were collected and the effective response rate was 92%.The strengths and weaknesses of the modern training model were analyzed through a mixed qualitative and quantitative research method.It was found that 68%of the students thought that the modern model had obvious advantages in practical teaching,but 42%of the students thought that it still needed to be improved in personalized teaching.This study provides an empirical basis and specific suggestions for optimizing the cultivation of rehabilitation therapy technology talents. 展开更多
关键词 Rehabilitation therapy technology Talent training model Mixed qualitative and quantitative research empirical research
下载PDF
Empirical Study on Protection of Drinking Water in China——Taking Lin'an as an Example 被引量:6
14
作者 JIANG Chun-hua 《Meteorological and Environmental Research》 2012年第5期35-38,42,共5页
[ObjectiveJ Taking Lin'an City in Zhejiang Province as an example, the protection of drinking water in China was studied. [Method] Through consulting historical data, questionnaire, and interview, and based on the ex... [ObjectiveJ Taking Lin'an City in Zhejiang Province as an example, the protection of drinking water in China was studied. [Method] Through consulting historical data, questionnaire, and interview, and based on the experience and achievement of protecting drinking water in Lin'an during the "eleventh five-year plan" period, problems in the protection of drinking water in Lin'an was proposed. [ Result] Through empirical study, huge achievement in protecting drinking water in Lin'an in recent years was achieved. However, there were still problems such as safety problem in the water protection area, room for improving pollution management, investment input and public participation, etc. In response to the problems, it was proposed to strengthen the publicity and education, fortify pollution management and innovate fund raising mechanism, etc. to construct all- round water protection network. [Conclusion] The study provided experience for the protection of drinking water in China. 展开更多
关键词 Lin'an City Protection of drinking water empirical research China
下载PDF
Research on Financial Performance of State-owned Enterprise Mixed Ownership Reform 被引量:2
15
作者 DU Qian 《International English Education Research》 2018年第4期13-16,共4页
Mixed ownership is an important form of realization of China's economic system reform and development, and it is also the main direction of state-owned enterprise reform. In order to further promote the deepening of ... Mixed ownership is an important form of realization of China's economic system reform and development, and it is also the main direction of state-owned enterprise reform. In order to further promote the deepening of the reform of mixed ownership, this paper randomly selects 200 listed state-owned enterprises as research objects, and studies the trends of the financial performance of these enterprises from the mixed state-owned enterprises and non-mixed-modification enterprises in the five years from 2013 to 2017, and compares their various trends. Financial indicators, a comprehensive evaluation of the problems and causes in the reform of the mixed ownership system, and then propose countermeasures to further deepen the reform of mixed ownership based on the research conclusions. 展开更多
关键词 state-owned enterprises mixed ownership reform financial performance empirical research
下载PDF
Educational Practices in the Model of Music Learning Theory of E. Edwin Gordon: An Observational Research 被引量:1
16
作者 Antonella Nuzzaci 《Journal of Literature and Art Studies》 2013年第5期263-277,共15页
This paper analyzes the supervision activity, to which educators and teachers enrolled with AIGAM (Gordon Italian Association for the Musical Learning) are subject to every year and intends to verify the application... This paper analyzes the supervision activity, to which educators and teachers enrolled with AIGAM (Gordon Italian Association for the Musical Learning) are subject to every year and intends to verify the application of those principles expressed in the learning model of the MLT (Music Learning Theory) developed by educational psychologist E. Edwin Gordon (1989, 1999, 2000, 2001, 2007) and promoted internationally by various institutions and organizations specifically accredited. It describes the influence of the videotaped supervision on the process, functions of monitoring, and evaluation of educational practices, starting with an empirical model that has guided the interventions in a study of supervision on training aimed at consolidating and developing professional skills in music education in early childhood. This paper sought to understand: the kind of practices, interactions, communications developing during an educational actions, the existence of a consistent relationship between the principles expressed in the MLT and their application, the type and benefits of supervision performed by of video recording on stakeholders in terms of change in professional behavior, and finally whether the active supervision could be comparable with other kinds of approaches. 展开更多
关键词 music education MLT (Music Learning Theory) empirical research in music education observational tool
下载PDF
Empirical antibiotic treatment with piperacillin-tazobactam in Patients with microbiologically-documented biliary tract infections
17
作者 Gabrio Bassotti Fabio Chistolini +2 位作者 Francis Sietchiping-Nzepa Giuseppe de Roberto Antonio Morelli 《World Journal of Gastroenterology》 SCIE CAS CSCD 2004年第15期2281-2283,共3页
AIM: To report our experience with empiric antimicrobial monotherapy (piperacillin/tazobactam, of which no data are available in such specific circumstances) in microbiologically-documented infections in patients with... AIM: To report our experience with empiric antimicrobial monotherapy (piperacillin/tazobactam, of which no data are available in such specific circumstances) in microbiologically-documented infections in patients with benign and malignant conditions of the biliary tract.METHODS: Twenty-three patients, 10 with benign and 13 with malignant conditions affecting the biliary tree and microbiologically-documented infections were recruited and the efficacy of empirical antibiotic therapy was assessed.RESULTS: The two groups featured similar demographic and clinical data. Overall, the infective episodes were most due to Gram negative agents, more than 60% of such episodes (mostly in malignant conditions) were preceded by invasive instrumental maneuvers. Empirical antibiotic therapy with a single agent (piperacillin/tazobactam) was effective in more than 80% of cases. No deaths were reported following infections. CONCLUSION: An empiric therapeutic approach with piperacillin/tazobactam is highly effective in biliary tract infections due to benign or malignant conditions. 展开更多
关键词 ADULT Aged Aged 80 and over Anti-Bacterial Agents Biliary Tract Diseases Biliary Tract Neoplasms Drug Combinations empirical research FEMALE Humans Infection MALE Middle Aged Penicillanic Acid derivatives PIPERACILLIN
下载PDF
An Empirical Study on Hainan Citizens'Participation in Urban Community Governance under the Background of Free Trade Port Construction
18
作者 Yuanyuan Zhou 《Journal of Architectural Research and Development》 2020年第3期8-16,共9页
Hainan is in the period of high-speed development and transformation of government management.To build a free trade port with Chinese characteristics requires a modern social governance system that confirms to the tre... Hainan is in the period of high-speed development and transformation of government management.To build a free trade port with Chinese characteristics requires a modern social governance system that confirms to the trend of the times,and community governance is important part of whole social governance system.Citizens'cooperative participation in grass-roots community governance has the functions of creating a good living environment,reducing social conflicts,improving residents'sense of well-being and attracting all kinds of talents.Based on the perspective of multi cooperative social governance,this paper empirically investigates the current situation of Hainan urban resident's participation in community governance,explores the reasons for the lack of citizen participation in community governance,and puts forward suggestions for improving citizen participation in community governance. 展开更多
关键词 Citizen participation Community governance empirical research
下载PDF
Georgian Farmers' Attitudes Towards Genetically Modified Crops 被引量:1
19
《Economics World》 2017年第4期362-369,共8页
Although, genetically engineered products (GM) have to be a broadly debated topic in different countries, there has been much less attention devoted to farmers' attitudes towards GM crops. This paper attempts to re... Although, genetically engineered products (GM) have to be a broadly debated topic in different countries, there has been much less attention devoted to farmers' attitudes towards GM crops. This paper attempts to research farmers' insights on GM crops in Georgia through February-March 2014. An in-depth survey of 611 farmers revealed that respondents lack sufficient knowledge about genetic engineering. They tend to have a negative attitude towards GM crops and are strongly against of import and adoption of GM seeds. An empirical examination based on analysis of variance and Pearson's correlation coefficient verified that both education and age were significant determinants of awareness of farmers about genetically engineered crops, while income used to have no significant influence on the farmers' decision to adopt GM crops. In addition, relationship between awareness about genetic engineering and farmers' decision to adopt GM crops has to be insignificant, as well. 展开更多
关键词 genetically modified crops FARMERS ATTITUDES empirical research AWARENESS Georgia
下载PDF
Analyzing the Operational Performance Migration of Telecom Operators
20
作者 Xiaohang Zhang Yu Du +1 位作者 Zhengren Li Qi Wang 《China Communications》 SCIE CSCD 2018年第6期139-157,共19页
Due to the rapid development of mobile Internet services, such as Skype and WeChat, traditional telecom services have suffered a large decline in the business volumes in recent years. Thus, telecom operators pay much ... Due to the rapid development of mobile Internet services, such as Skype and WeChat, traditional telecom services have suffered a large decline in the business volumes in recent years. Thus, telecom operators pay much attention to analyzing the changes of the enterprise performance, in order to adjust market strategies in time. In this paper, we propose a new methodology to analyze the operation data of telecom operators dynamically,which can characterize the changing process of the operating states and predict the developing trends. In particular, the proposed methodology contains two steps: migration pattern analysis and trajectory pattern analysis.Firstly, migration analysis is based on the changing of operating states between two points-in-time, which is referred to as the migration paths. Applying the clustering analysis to the migration paths can obtain the migration patterns, which characterize the changing feature of telecom operators during a short period, e.g. one month. Secondly, we combine a sequence of consecutive migration paths to obtain the migration trajectory. Through analyzing different trajectories based on the hierarchical cluster method and the Markov chain model, we obtain the trajectory patterns,which describe the changing progress during a relatively long period, e.g. one year. Based on the trajectory patterns, we can predict the possible performance changes. Finally, we apply the proposed method to a Chinese telecom operator for an empirical research, and has obtained a lot of development rules which provides insights into current telecom. 展开更多
关键词 performance measurement clustering migration telecom operators empirical research development models
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部