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问题 单项选择题 A1/A2型题

正常人血量约占体重的（）

A.4%～6%

B.6%～8%

C.8%～10%

D.6%～10%

E.40～8%

答案

参考答案：C

解析：正常成人血量约为(70±10ml)／kg体重，成人4～5L，占体重的6%～8%。

填空题

1) ______ the Oral Approach
2) ______ the Cognitive Approach
3) ______ the Communicative Approach
4) ______ the Audiolingnal Method
5) ______ the Direct Method
a) The use of drills and pattern practice is one of its distinctive features.
b) The practice techniques adopted in this approach generally consists of guided repetition and substitution activity.
c) Written work should be graded.
d) Role play and simulation activities are often thought to be one of the most effective ways of integrating language skills in the language classroom.
e) It seeks the intellectual understanding by the learner of the language as a system.
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问答题 简答题

十八世纪的化学家拉瓦锡宣布了关于燃烧的氧化学说，从而推翻了什么学说？
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