Vocabulary learning strategies have been studied by a lot of scholars and teachers to a different extent on language learner of different levels.Little research has been done on three-year Business English majors.This...Vocabulary learning strategies have been studied by a lot of scholars and teachers to a different extent on language learner of different levels.Little research has been done on three-year Business English majors.This study is intended to examine the vocabulary learning strategies applied by those students to their vocabulary learning during the course of English learning.This study is carried out in the form of doing a questionnaire among 117 three-year Business English majors.The collected data is analyzed in the computer by using the SPSS software.The result is that most of the students give up the concept and strategy of repetition and accept the concept of context and practicing.In addition,most of the students know how to make use of cognitive strategies to learn vocabulary.However,those students seldom employ metacognitive strategies and social/affective strategies to facilitate their vocabulary learning.In light of these,some recommendations have given to those students to help them learn more vocabulary by appropriately using the vocabulary learning strategies.展开更多
This paper deals with the bio-oxidation of galena particles （-80 meshes） using Acidithiobacillus ferrooxidans and compares it with Fe^3＋ oxidation. Experimental results show that, at least, 0.00197 mol galena was l...This paper deals with the bio-oxidation of galena particles （-80 meshes） using Acidithiobacillus ferrooxidans and compares it with Fe^3＋ oxidation. Experimental results show that, at least, 0.00197 mol galena was leached from lOOmL pulp （density of 3.8%） with 39 days＇ bio-oxidation, as compared to 0.00329 mol galena by Fe^3＋ with 9 days＇ oxidation. Because Fe^3＋ was constantly consumed, leaching by Fe^3＋ almost stopped after 9 days. Large amounts of lead sulfate were detected in both bio-oxidation and Fe^3＋ oxidation of galena. A. ferrooxidans followed a unique growth pattern during the bio-oxidation of galena. In the initial 15 days, the bacteria attached themselves to the galena surface with the formation of erosion pits similar in shape and length to those of the bacteria, and there were hardly any bacteria suspended in the solution. After 15 days, suspended bacteria increased. It is thus suggested that A. ferrooxidans may directly oxidize galena.展开更多
文摘Vocabulary learning strategies have been studied by a lot of scholars and teachers to a different extent on language learner of different levels.Little research has been done on three-year Business English majors.This study is intended to examine the vocabulary learning strategies applied by those students to their vocabulary learning during the course of English learning.This study is carried out in the form of doing a questionnaire among 117 three-year Business English majors.The collected data is analyzed in the computer by using the SPSS software.The result is that most of the students give up the concept and strategy of repetition and accept the concept of context and practicing.In addition,most of the students know how to make use of cognitive strategies to learn vocabulary.However,those students seldom employ metacognitive strategies and social/affective strategies to facilitate their vocabulary learning.In light of these,some recommendations have given to those students to help them learn more vocabulary by appropriately using the vocabulary learning strategies.
基金This work was supported by the National Natural Science Foundation of China （Grant Nos. 40532011, 40403004 and 40473032）；Important Direction Project of Knowledge Innovation Program of the Chinese Academy of Sciences （Grant No. KZCX3-SW-223）.
文摘This paper deals with the bio-oxidation of galena particles （-80 meshes） using Acidithiobacillus ferrooxidans and compares it with Fe^3＋ oxidation. Experimental results show that, at least, 0.00197 mol galena was leached from lOOmL pulp （density of 3.8%） with 39 days＇ bio-oxidation, as compared to 0.00329 mol galena by Fe^3＋ with 9 days＇ oxidation. Because Fe^3＋ was constantly consumed, leaching by Fe^3＋ almost stopped after 9 days. Large amounts of lead sulfate were detected in both bio-oxidation and Fe^3＋ oxidation of galena. A. ferrooxidans followed a unique growth pattern during the bio-oxidation of galena. In the initial 15 days, the bacteria attached themselves to the galena surface with the formation of erosion pits similar in shape and length to those of the bacteria, and there were hardly any bacteria suspended in the solution. After 15 days, suspended bacteria increased. It is thus suggested that A. ferrooxidans may directly oxidize galena.
