试题与答案

关于原电池的说法正确的是( ) A.在正极上发生氧化反应 B.化学性质相对活泼的

题型:选择题

题目:

关于原电池的说法正确的是(  )

A.在正极上发生氧化反应

B.化学性质相对活泼的金属为负极

C.在外电路电子从正极流出

D.在负极上发生还原反应

答案:

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题型:填空题


Directions:This section consists of three groups of pairs listed in two columns, A and B. You are to match the one marked 1), 2), 3),4) or 5) in Column A with the one marked a, b, c, d or e in Column B. One point is given to each pair you match.
1) ______ language acquisition device (LAD)
2) ______ stimulus and response
3) ______ the discourse theory
4) ______ acquisition and learning
5) ______ the input hypothesis
a) The former refers to the subconscious process leading to the development of "competence"; the latter refers to conscious study and knowledge of grammatical rules.
h) A sort of mechanism or device which contains the capacity to acquire one’ s first language.
c) It assumes that humans acquire language in only one way--by understanding messages, or by receiving "comprehensible input".
d) It believes there is little difference between the first language acquisition process and the process of second language acquisition--only through communication discourses.
e) The former serves to elicit behaviour; the latter is triggered by the former.

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