In 2016, there is a reform of the TEM-4 cloze test, which changes from multiple choice cloze test toward banked cloze test. The study takes multiple choice cloze test in 2015 before reform and bank cloze test after re...In 2016, there is a reform of the TEM-4 cloze test, which changes from multiple choice cloze test toward banked cloze test. The study takes multiple choice cloze test in 2015 before reform and bank cloze test after reform in 2016 as research subjects, and research data are from true test results of 48 test-takers. The performance analysis was done by using FACETS(Version 2.7) and SPSS 19.0. This research aims at exploring the relationships between two different cloze forms and the differentiated performance of test-takers, and also testing reliability and validity of two cloze forms. Results show that multiple choice cloze test and banked cloze test have great difference on reflecting test-takers' English ability. Banked cloze test can better reflect test-takers' English ability if more items are added.展开更多
A survey was carried out in this study to find out the factors that the raters perceived as affecting the rating of TEM-4 Oral Test, a large-scale tape-mediated oral English testing system in China. The findings show ...A survey was carried out in this study to find out the factors that the raters perceived as affecting the rating of TEM-4 Oral Test, a large-scale tape-mediated oral English testing system in China. The findings show that what the raters perceived as affecting the rating included training, raters' interaction with the rating criteria, raters' physical and emotional conditions, raters' attitudes towards the rating work, raters' oral English proficiency level, and the recording quality. Raters' educational and research background were perceived not to affect the rating.展开更多
The residues of organophosphorus pesticide(OPs)on fruits and vegetables pose a threat to human health,so it is very meaningful to explore simple and fast detect methods for OPs residual.In this work,nickel ferrite/nic...The residues of organophosphorus pesticide(OPs)on fruits and vegetables pose a threat to human health,so it is very meaningful to explore simple and fast detect methods for OPs residual.In this work,nickel ferrite/nickel oxide nanoparticles co-loaded three-dimensional reduced graphene oxide(3DRGONiFe2O4/NiO NPs),as a new low cost nanocomposite,was prepared.Based on its high performance mimetic peroxidase activity,a colorimetric method for the detection of OPs has been developed.Dichlorvos was chosen as model compounds to evaluate the detection performance.The detection linear range for dichlorvos is from 50μg/mL to 2.5×10^4μg/mL with a detection limit of 10μg/mL.Furthermore,a test paper can be developed based on the 3 DRGO-NiFe2O4/NiO NPs for visual detection of dichlorvos,and the image information of the paper sensor can be converted into digital signal and quantitative detection by a smartphone.Notably,this method can also be used to detect dichlorvos in real samples,including vegetables and fruits.Thus,the developed naked assay holds great potential in simple,inexpensive and rapid detection of OPs in fruit and vegetable samples.展开更多
文摘In 2016, there is a reform of the TEM-4 cloze test, which changes from multiple choice cloze test toward banked cloze test. The study takes multiple choice cloze test in 2015 before reform and bank cloze test after reform in 2016 as research subjects, and research data are from true test results of 48 test-takers. The performance analysis was done by using FACETS(Version 2.7) and SPSS 19.0. This research aims at exploring the relationships between two different cloze forms and the differentiated performance of test-takers, and also testing reliability and validity of two cloze forms. Results show that multiple choice cloze test and banked cloze test have great difference on reflecting test-takers' English ability. Banked cloze test can better reflect test-takers' English ability if more items are added.
基金This study is one part of the TEM-4 Oral Test project funded by Institute of Oral English Studies of Nanjing University The author here shows her gratitude to the institute and TEM-4 Oral Test Center for both financial and data support
文摘A survey was carried out in this study to find out the factors that the raters perceived as affecting the rating of TEM-4 Oral Test, a large-scale tape-mediated oral English testing system in China. The findings show that what the raters perceived as affecting the rating included training, raters' interaction with the rating criteria, raters' physical and emotional conditions, raters' attitudes towards the rating work, raters' oral English proficiency level, and the recording quality. Raters' educational and research background were perceived not to affect the rating.
基金financially supported by the National Natural Science Foundation of China (Nos.21874061,21207057,21405159, 21505061)the Fundamental Research Funds for the Central Universities (Nos.lzujbky-2016-43,lzujbky-2018-80)
文摘The residues of organophosphorus pesticide(OPs)on fruits and vegetables pose a threat to human health,so it is very meaningful to explore simple and fast detect methods for OPs residual.In this work,nickel ferrite/nickel oxide nanoparticles co-loaded three-dimensional reduced graphene oxide(3DRGONiFe2O4/NiO NPs),as a new low cost nanocomposite,was prepared.Based on its high performance mimetic peroxidase activity,a colorimetric method for the detection of OPs has been developed.Dichlorvos was chosen as model compounds to evaluate the detection performance.The detection linear range for dichlorvos is from 50μg/mL to 2.5×10^4μg/mL with a detection limit of 10μg/mL.Furthermore,a test paper can be developed based on the 3 DRGO-NiFe2O4/NiO NPs for visual detection of dichlorvos,and the image information of the paper sensor can be converted into digital signal and quantitative detection by a smartphone.Notably,this method can also be used to detect dichlorvos in real samples,including vegetables and fruits.Thus,the developed naked assay holds great potential in simple,inexpensive and rapid detection of OPs in fruit and vegetable samples.
