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问题 单项选择题

河流水质采样断面一般情况下应设置（）。

A.对照、控制、选择三种类型

B.对照、选择两种类型

C.对照、控制、消减三种类型

D.控制、消减两种类型

答案

参考答案：C

单项选择题

The Direct Method got its name from the assumption that meanings are to be connected directly with ______, without going through the process of translating into the students' native language.

A. the first language



B. the native language
C. the target language


D. the learner's language
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问答题 简答题

简述我国家庭的结构类型？
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