期刊文献+
共找到54篇文章
< 1 2 3 >
每页显示 20 50 100
全媒体时代“云学霸”现象分析及教育引导
1
作者 李坦楼 董欢 《思想理论教育》 CSSCI 2020年第5期82-86,111,共6页
全媒体时代,网络已成为大学生获取信息、交流思想、接受教育的重要场域。"云学霸"现象是全媒体时代一种契合大学生个性偏好的自发性网络学习模式。"云学霸"现象有助于高校打造新的网络育人空间、拓展新的网络文化... 全媒体时代,网络已成为大学生获取信息、交流思想、接受教育的重要场域。"云学霸"现象是全媒体时代一种契合大学生个性偏好的自发性网络学习模式。"云学霸"现象有助于高校打造新的网络育人空间、拓展新的网络文化平台、创设新的网络育人场景,同时也对高校思想政治工作模式、知识传授模式及师生关系模式等构成了新的挑战。推进高校"云学霸"模式,应从价值引领、融合创新、协同育人、引导监管等方面着手,提升高校思想政治工作精准度和有效性,助力高校网络育人工作。 展开更多
关键词 全媒体 云学霸” 网络育人
原文传递
Boehmeria nivea var. strigosa (Urticaceae), a new variety from Southwest China 被引量:1
2
作者 ZHAO Ying Richard I.MILNE +2 位作者 LI Zhipeng Amos KIPKOECH WU Zengyuan 《广西植物》 CAS CSCD 北大核心 2024年第9期1617-1624,I0001-I0006,共14页
Boehmeria nivea var.strigosa Zeng Y.Wu&Y.Zhao,a new variety of B.nivea(Urticaceae)from Southwest China,is here described based on evidence from morphology and molecular phylogeny.This new variety is mainly charact... Boehmeria nivea var.strigosa Zeng Y.Wu&Y.Zhao,a new variety of B.nivea(Urticaceae)from Southwest China,is here described based on evidence from morphology and molecular phylogeny.This new variety is mainly characterized by its green abaxial leaf blade,partly connate stipules,and densely patent strigose hairs on stems and potioles.The phylogenetic analysis based on rbc L,nrDNA and rbc L+nrDNA datasets,revealed that all individuals of B.nivea var.strigosa formed a monophyletic group.The conservation status of B.nivea var.strigosa is assessed as“Near Threatened”(NT)according to IUCN evaluation criteria.The discovery of this new variety is not only crucial for the taxonomy of ramie,but also provides reference for the exploration and utilization of ramie. 展开更多
关键词 Boehmeria nivea MORPHOLOGY molecular phylogeny new variety Southwest China YUNNAN
下载PDF
Cosmic Ray-driven Bioenergetics for Life in Molecular Clouds
3
作者 FENG Lei 《天文学报》 CAS CSCD 北大核心 2024年第6期26-31,共6页
According to models such as panspermia or the Nebula-Relay hypothesis,the ancestors of life on Earth once lived in molecular clouds.Then what are the energy source and bioenergetics for such lifeforms?A new bioenerget... According to models such as panspermia or the Nebula-Relay hypothesis,the ancestors of life on Earth once lived in molecular clouds.Then what are the energy source and bioenergetics for such lifeforms?A new bioenergetic mechanism powered by cosmic ray ionization of hydrogen molecules is proposed and its relation with the origin of chemiosmosis is also discussed in this paper.Based on this mechanism,the Last Universal Common Ancestor may be a type of lifeform that utilizes hydrogen molecules as donors of electron transport chains. 展开更多
关键词 ASTROBIOLOGY ASTROCHEMISTRY interstellar medium(ISM) NEBULAE cosmic ray
下载PDF
Morphology of Pyrocoelia pygidialis Pic (Coleoptera:Lampyridae) with Notes on Its Biology 被引量:4
4
作者 李学燕 解萌 +1 位作者 董平轩 梁醒财 《Entomotaxonomia》 CSCD 北大核心 2008年第4期300-308,共9页
Morphology of different development stages from egg, larva, pupa to adult (male and female) of the firefly, Pyrocoelia pygidialis Pic, was described in details. Some biological habits were noted according to the rec... Morphology of different development stages from egg, larva, pupa to adult (male and female) of the firefly, Pyrocoelia pygidialis Pic, was described in details. Some biological habits were noted according to the records of field collection and observation, with references to the rearing in the laboratory. With weakly luminous egg, larva, pupa and female adult, and much weaker luminous male adult only when disturbed, P pygidialis Pic is considered as a diurnal firefly, and chemical signal, instead of light signal, is possibly its dominant means of male-female recognition. 展开更多
关键词 COLEOPTERA LAMPYRIDAE Pyrocoelia MORPHOLOGY BIOLOGY YUNNAN
下载PDF
Chemical Constituents of Rubia yunnanensis Root 被引量:1
5
作者 徐晓莹 周金云 方起程 《Journal of Chinese Pharmaceutical Sciences》 CAS 1995年第3期157-160,共4页
从云南茜草[Rubiayunnanensis(France.)Diels]根部的乙醚提取物中分离得到六个化合物,经光谱(UV,IR,MS, ̄1HNMRand ̄13CNMR)分析和文献对照,证明其中五个为已知化合物:茜... 从云南茜草[Rubiayunnanensis(France.)Diels]根部的乙醚提取物中分离得到六个化合物,经光谱(UV,IR,MS, ̄1HNMRand ̄13CNMR)分析和文献对照,证明其中五个为已知化合物:茜草乔木醇A,茜草乔木醇G,茜草乔木酮A,1,3,6-三羟基-2-甲基蒽醌和β-谷甾醇。一个新化合物7β,19α,28-三羟基乔木-9(11)-烯-3-酮(Ⅲ),命名为茜草乔木酮B。 展开更多
关键词 Rubia yunnanellsis TRITERPENES Rubiarbonone B AnthraquinoneReferences
下载PDF
Chemical constituents from Coriolus versicolor L.
6
作者 毕诚 郭晓宇 车庆明 《Journal of Chinese Pharmaceutical Sciences》 CAS 2007年第1期38-40,共3页
Aim To study the chemical constituents from Coriolus versicolor L.. Methods Chromatographic techniques were employed for separation and purification. The structures were identified on the basis of spectroscopic analys... Aim To study the chemical constituents from Coriolus versicolor L.. Methods Chromatographic techniques were employed for separation and purification. The structures were identified on the basis of spectroscopic analysis. Results Eight compounds were isolated and identified as ergosta-7, 22-dien-313 -yl palmitate (1), ergosta-7, 22-dien-313 -ol (2), betulic acid (3), 4-hydroxy benzoic acid (4), 3- methoxy-4-hydroxy benzoic acid (5), 3, 5-dimethoxyl-4-hydroxy benzoic acid (6), 2-furoic acid (7), and nicotinic acid (8). Conclusion Eight compounds were reported for the first time from Coriolus versicolor L.. 展开更多
关键词 Coriolus versicolor L. Chemical constituents STEROID
下载PDF
Kinetics of extracting magnesium from mixture of calcined magnesite and calcined dolomite by vacuum aluminothermic reduction 被引量:7
7
作者 傅大学 冯乃祥 +2 位作者 王耀武 彭建平 狄跃忠 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第3期839-847,共9页
The vacuum aluminothermic reduction of the mixture of calcined magnesite and calcined dolomite was studied. An isothermal reduction method satisfying the vacuum aluminothermic reduction was proposed. The experiments w... The vacuum aluminothermic reduction of the mixture of calcined magnesite and calcined dolomite was studied. An isothermal reduction method satisfying the vacuum aluminothermic reduction was proposed. The experiments were carried out at 4 Pa. The results indicate that the reduction rate is increased with increasing temperature, content of aluminum and pellet forming pressure. The XRD patterns of pellets at different reduction stages confirm that the reduction process can be roughly classified into three stages:the formation of MgAl2O4, and Ca12Al14O33 phases;the phase transformation from MgAl2O4 and C12A7 to CaAl2O4;the formation of CaAl4O7 phase. The experimental data were divided into three parts according to the kinetic models. The apparent activation energies of the three parts were determined to be 98.2, 133.0 and 223.3 kJ/mol, respectively. 展开更多
关键词 Amagnesium KINETICS aluminothermic reduction MAGNESITE DOLOMITE
下载PDF
再现 品句 多读——我这样教《火烧云》一课
8
作者 刘学英 《湖北教育》 1999年第3期33-32,共2页
《火烧云》是一篇讲读课文,作者抓住火烧云颜色、形状多和变化快这两个特点,描绘了火烧云的绚丽多彩和美妙奇异。那么,怎样才能让学生体会到文美和景美呢?我是这样做的—— 一、再现情境。教学前,我把夏天的火烧云这一自然景现实录下来... 《火烧云》是一篇讲读课文,作者抓住火烧云颜色、形状多和变化快这两个特点,描绘了火烧云的绚丽多彩和美妙奇异。那么,怎样才能让学生体会到文美和景美呢?我是这样做的—— 一、再现情境。教学前,我把夏天的火烧云这一自然景现实录下来,配上录音。教学时,我先让学生一边听录音一边看录像。 展开更多
关键词 《火烧云》 自然景现 象束 云学 快读 建始县 再现情 教学前 讲读课文 生儿
下载PDF
Comparison of Genetic Diversity Between Local Cultivated Aromatic and Non-aromatic Rice in Yunnan Province 被引量:6
9
作者 白现广 程在全 +2 位作者 蔺忠龙 吕广磊 黄兴奇 《Agricultural Science & Technology》 CAS 2009年第1期56-59,共4页
[ Objective] The genetic diversity of the local cultivated aromatic rice and non-aromatic rice in Yunnan Province were compared to provide further genetic resources for breeding practice. [Method] Genetic diversity of... [ Objective] The genetic diversity of the local cultivated aromatic rice and non-aromatic rice in Yunnan Province were compared to provide further genetic resources for breeding practice. [Method] Genetic diversity of 10 aromatic rice and 45 non-aromatic rice were analyzed by 64 SSR primers covered on 12 rice chromosomes. [ Result] Per locus 5.44 and 7.98 alleles in average were detected, ranging from 2 to 12 and from 2 to 17 in aromatic and non-aromatic rice, respectively. Average genetic multiplicity index(Hs) was 0.46 and 0.67 respectively. The average polymorphism information content (PIC) was 0.43 and 0.58 in aromatic and non-aromatic rice respectively. [ Conclusion] The results indicated that genetic diversity was higher in non-aromatic rice than in aromatic rice. 展开更多
关键词 Aromatic rice Local cultivated rice SSR markers Cluster analysis Genetic diversity
下载PDF
守成不泥脱成不背——记程派宗师、京剧表演艺术家程砚秋
10
作者 邵章 《满族研究》 1987年第1期82-83,共2页
程砚秋(1904~1958)是京剧旦角表演艺术大师,程派的创始人,与梅兰芳、荀慧生、尚小云並誉为京剧四大名旦,工青衣。 他是满族人,生于北京,姓瓜尔佳氏,是荣禄的侄辈,原名承麟,后改“承”为“程”姓。早年艺名程菊农,后更名艳秋,号玉霜。1... 程砚秋(1904~1958)是京剧旦角表演艺术大师,程派的创始人,与梅兰芳、荀慧生、尚小云並誉为京剧四大名旦,工青衣。 他是满族人,生于北京,姓瓜尔佳氏,是荣禄的侄辈,原名承麟,后改“承”为“程”姓。早年艺名程菊农,后更名艳秋,号玉霜。1932年易名砚秋,改号御霜。他在艺术上艰苦探索,卓然成家。幼年家贫,6岁从荣蝶仙、荣春亮习武功和武生,后从陈桐云学花旦,继而又师从陈啸云学青衣。12岁登台正式演出,颇获赞誉。后得诗人罗瘿公的多方支持(二人结为忘年之交,切磋艺术,瘿公专门为程砚秋创作和改编剧本达十一部)。 展开更多
关键词 程砚秋 京剧表演艺术 守成 宗师 云学 传统剧目 程派艺术 王瑶卿 改编剧本 满族人
下载PDF
RESEARCH ON SATELLITE IMAGE PROCESSING AND RECOGNITION WITH PARALLEL ALGORITHM 被引量:1
11
作者 刘正光 郭爱民 +1 位作者 程彦 刘勇 《Transactions of Tianjin University》 EI CAS 1999年第2期73-77,共5页
Using the method of mathematical morphology,this paper fulfills filtration,segmentation and extraction of morphological features of the satellite cloud image.It also gives out the relative algorithms,which is realized... Using the method of mathematical morphology,this paper fulfills filtration,segmentation and extraction of morphological features of the satellite cloud image.It also gives out the relative algorithms,which is realized by parallel C programming based on Transputer networks.It has been successfully used to process the typhoon and the low tornado cloud image.And it will be used in weather forecast. 展开更多
关键词 satellite cloud image extraction of morphological features mathematical morphology parallel processing
下载PDF
遗失启事
12
《贵州农机化》 2010年第3期40-40,共1页
关键词 遗失 启事 驾驶证 行驶证 金国 云学 天才 春菊 陈国 中华
下载PDF
Mineral Elements in Different Varieties of Camellia sinensis 被引量:15
13
作者 李春华 王云 《Agricultural Science & Technology》 CAS 2009年第1期105-107,共3页
To understand the mineral elements in different varieties of tea ( Camellia sinensis), 17 mineral elements in eight tea varieties including Yunnan Dayezhong, No. 43 Longjing and No. 6 Zaobaijian, were measured. The ... To understand the mineral elements in different varieties of tea ( Camellia sinensis), 17 mineral elements in eight tea varieties including Yunnan Dayezhong, No. 43 Longjing and No. 6 Zaobaijian, were measured. The results showed that nine elements, such as P, K, Ba, Mn, Cu, were significantly different among varieties, others did not. Black tea varieties usually contain high contents of Cu and K. As a conclusion, mineral elements should be extensively considered in breeding tea varieties. 展开更多
关键词 Camellia sinensis BREEDING Mineral element
下载PDF
Studies on diversity of higher fungi in Yunnan, southwestern China:A review 被引量:5
14
作者 Bang Feng Zhuliang Yang 《Plant Diversity》 SCIE CAS CSCD 2018年第4期165-171,共7页
Yunnan is exceedingly rich in higher fungi(Ascomycota and Basidiomycota). Given that the number of fungi(including lichens) occurring in a given area is, as Hawksworth suggested, roughly six times that of local vascul... Yunnan is exceedingly rich in higher fungi(Ascomycota and Basidiomycota). Given that the number of fungi(including lichens) occurring in a given area is, as Hawksworth suggested, roughly six times that of local vascular plants, a total of approximately 104,000 fungal species would be expected in Yunnan.However, to date only about 6000 fungal species, including roughly 3000 species of higher fungi, have been reported from the province. Although studies on Yunnan's fungi started in the late nineteenth century, significant progress has been made only in the last forty-five years. Over the first twenty-five years of this period, studies on fungal diversity in this area have largely been about taxonomy based on morphological characters and partially on geographical distribution. Over the past twenty years, the combination of both morphological and molecular phylogenetic approaches has become the preferred method to help understand the diversity and evolution of higher fungi. This review focuses on our current knowledge of how geological, geographical, and ecological factors may have contributed to the diversity patterns of higher fungi in Yunnan. Based on this knowledge, three aspects for future studies are suggested. 展开更多
关键词 ASCOMYCOTA BASIDIOMYCOTA BIOGEOGRAPHY Evolution Fungal diversity YUNNAN
下载PDF
Recovery of valuable metals from lepidolite by atmosphere leaching and kinetics on dissolution of lithium 被引量:14
15
作者 Jin-lian LIU Zhou-lan YIN +2 位作者 Xin-hai LI Qi-yang HU Wei LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第3期641-649,共9页
The lepidolite located in Yichun, Jiangxi Province, China, was adopted to investigate the recovery of alkali metals and leaching kinetics of lithium with sulphuric acid solution under atmospheric pressure. The results... The lepidolite located in Yichun, Jiangxi Province, China, was adopted to investigate the recovery of alkali metals and leaching kinetics of lithium with sulphuric acid solution under atmospheric pressure. The results show that the recoveries of alkali metals were achieved under the leaching conditions: mass ratio of lepidolite with particle size less than 180 μm to sulphuric acid 1.2, leaching temperature 411 K, liquid-solid ratio 2.5∶1, and leaching time 10 h. Under the selected conditions for leaching experiment, the leaching rates of lithium, potassium, rubidium and caesium are 94.18%, 93.70%, 91.81% and 89.22%, respectively. The X-ray diffraction analysis for leaching residue indicates that no insoluble product forms during leaching. The chemical compositions of leaching residue reveal that trace iron, manganese and calcium disappear after acid leaching. The kinetics of leaching process for lithium follows shrinking core model of mixed control and the apparent activation energy is 17.21 kJ/mol. The reaction orders with respect to sulphuric acid concentration and liquid-solid ratio are determined to be 2.85 and 1.66, respectively. A semi-empirical rate equation was obtained to describe the leaching process. The kinetic analysis shows that the leaching process is controlled by diffusion through the insoluble layer of the associated minerals. 展开更多
关键词 KINETICS LEPIDOLITE LITHIUM activation energy LEACHING
下载PDF
A CLOUD-RESOLVING MODELING STUDY OF SURFACE RAINFALL PROCESSES ASSOCIATED WITH LANDFALLING TYPHOON KAEMI(2006) 被引量:8
16
作者 崔晓鹏 许凤雯 《Journal of Tropical Meteorology》 SCIE 2009年第2期181-191,共11页
The detailed surface rainfall processes associated with landfalling typhoon Kaemi(2006) are investigated based on hourly data from a two-dimensional cloud-resolving model simulation. The model is integrated for 6 da... The detailed surface rainfall processes associated with landfalling typhoon Kaemi(2006) are investigated based on hourly data from a two-dimensional cloud-resolving model simulation. The model is integrated for 6 days with imposed large-scale vertical velocity, zonal wind, horizontal temperature and vapor advection from National Center for Environmental Prediction (NCEP) / Global Data Assimilation System (GDAS) data. The simulation data are validated with observations in terms of surface rain rate. The Root-Mean-Squared (RMS) difference in surface rain rate between the simulation and the gauge observations is 0.660 mm h^-1, which is smaller than the standard deviations of both the simulated rain rate (0.753 mm h^-1) and the observed rain rate (0.833 mm h^-1). The simulation data are then used to study the physical causes associated with the detailed surface rainfall processes during the landfall. The results show that time averaged and model domain-mean Ps mainly comes from large-scale convergence (QWVF) and local vapor loss (positive QWVT). Large underestimation (about 15%) of Ps will occur if QWVT and QCM (cloud source/sink) are not considered as contributors to Ps ,QWVF accounts for the variation of P during most of the integration time, while it is not always a contributor to Ps,Sometimes surface rainfall could occur when divergence is dominant with local vapor loss to be a contributor to Ps - Surface rainfall is a result ofmulti-timescale interactions. QWVE possesses the longest time scale and the lowest frequeney the second and QCM of variation with time and may exert impact on P on longer time scales. QWVF possesses longest time scale and lowest frequency and can explain most of the variation of Ps. QWVT possess shorter time scales and higher frequencies, which can explain more detailed variations in Ps. Partitioning analysis shows that stratiform rainfall is dominant from the morning of 26 July till the late night of 27 July. After that, convective rainfall dominates till about 1000 LST 28 July. Before 28 July, the variations of QWVT in rainfall-free regions contribute less to that of the domain-mean QWVT while after that they contribute much, which is consistent to the corresponding variations in their fractional coverage. The variations of QWVF in rainfall regions are the main contributors to that of the domain-mean QWVF, then the main contributors to the surface rain rate before the afternoon of 28 July. 展开更多
关键词 surface rainfall processes landfalling typhoon cloud-resolving modeling study
下载PDF
A Numerical Study of Vortex and Precipitating Cloud Merging in Middle Latitudes 被引量:3
17
作者 平凡 罗哲贤 琚建华 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第5期1222-1225,共4页
We mainly focus on the study of precipitating cloud merging associated with vortex merging. The vortex and precipitating cloud merging are simulated by the cloud resolving model from 0000 21 to 1800 23 July 2003. The ... We mainly focus on the study of precipitating cloud merging associated with vortex merging. The vortex and precipitating cloud merging are simulated by the cloud resolving model from 0000 21 to 1800 23 July 2003. The results show that the model well simulates vortex circulation associated with precipitating clouds. It is also proven that the vortex merging follows the precipitating cloud merging although vortices show the spatial and temporal differences. The convection vorticity vector is introduced to describe the merging processes. Two merging cases are identified during the 42-h simulation and are studied. 展开更多
关键词 ISOLATED OBSTACLE CUMULUS CLOUDS CONVECTION EVOLUTION MERGERS LAYER GATE
下载PDF
GRADIENT DISTRIBUTION OF ACID RAIN IN THE SCENIC RESORT OF THE BAIYUN MOUNTAIN IN GUANGZHOU 被引量:1
18
作者 黄健 李福娇 +1 位作者 江奕光 李琼 《Journal of Tropical Meteorology》 SCIE 2004年第1期95-105,共11页
This paper analyzes the samples of rainwater from January to October 1999 at three monitoring sites of Baiyun Mountain and of aerosol composition in near-surface layer in January and June 1999 at two sites. The result... This paper analyzes the samples of rainwater from January to October 1999 at three monitoring sites of Baiyun Mountain and of aerosol composition in near-surface layer in January and June 1999 at two sites. The results suggest that (1) The pH value of rainwater is between 3.13 and 7.18, and the frequency of acid rain is more than 58 %. With the ascent of the monitoring sites, the pH value of rainwater decreases, and the frequency of acid rain increases. (2) In January, the chemical aerosol compositions at different altitudes are similar, but in June the acidity of aerosol rises at the higher site because of the increase of SO42-. (3) In rainwater, the proportion is such that SO42- is the most significant anion and Ca2+ is the most important cation, but both of them decrease as the altitude ascends. The proportion of NO3- and NH4+ rise at the higher site and have more contribution to the acidity of rainwater. (4) As the impact of automobile emissions around Baiyun Mountain, the proportion of NO3-/SO42-molecular concentration reaches 0.40, and NO3- is relatively more important to the rain acidity at the higher site. 展开更多
关键词 Baiyun Mountain RAINWATER aerosol chemical composition
下载PDF
The AHP analysis on Quality Evaluation oriented to Bilingual Teaching Practices in Yunnan' s Universities 被引量:1
19
作者 Lingling Liu 《International English Education Research》 2014年第4期97-100,共4页
A number of studies show that bilingual education in private universities is worth studying in recent years, but its feasibility causes many debates at the same time which students are not as superior in both English ... A number of studies show that bilingual education in private universities is worth studying in recent years, but its feasibility causes many debates at the same time which students are not as superior in both English proficiency and expertise as what we have expect- ed.However, it is undeniable that teaching process of teachers becomes significant influence on students' learning results. In my research I focus on the comprehensive view and procedures of teaching and set up the index system for evaluation of bilingual teaching process from teachers' perspective. In addition, I calculate the weighted value of each index at each level by using the root method, and determine the key success factors which affecting the quality of bilingual teaching process. Lastly, taking Oxbridge college as an example, I try to study what types of factors that constitutes conditions and limitations for a successful effect for bilingual teaching and to propose the solutions for improving and self-supervising in bilingual teaching process. 展开更多
关键词 Bilingual teaching Teaching process Analytic Hierarchy Process Key Success Factors
下载PDF
Numerical Simulation of Effects of Cloud Top Temperatures and Generating Cells on Secondary Ice Production in Stratiform Clouds with a Detailed Microphysical Model 被引量:1
20
作者 Yang Jie-Fan Lei Heng-Chi 《Atmospheric and Oceanic Science Letters》 2012年第2期75-81,共7页
This paper outlines a one-dimensional,heightdependent bin model with detailed microphysical processes in which ice splinters are produced by a riming process.The model is then applied to simulate the shift of particle... This paper outlines a one-dimensional,heightdependent bin model with detailed microphysical processes in which ice splinters are produced by a riming process.The model is then applied to simulate the shift of particle size distribution effected by the secondary ice production process within clouds with different generating cells and cloud top temperatures.The result of model simulations reveals the general effects of cloud updrafts on increasing ice particle concentration by extending the residence time of ice particles in clouds and providing sufficiently large supercooled water droplets.The rimesplintering mechanism is more effective in clouds with lower ice seeding rates than those with higher rates.Evolutions of hydrometeor size distribution triggered by the rime-splintering mechanism indicate that the interaction between large ice particles and supercooled water drops adds a "second maximum" to the primary ice spectra. 展开更多
关键词 MULTIPLICATION generating cells bin model size spectra
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部