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问题 多项选择题

根据观察对象的工作周期和工作突发性的不同，观察法可以具体分为（ ）

A．工作表演法

B．阶段观察法

C．直接观察法

D．问卷调查法

E．工作实践法

答案

参考答案：A,B,C

选择题

一Mr. Johnson, we have found your watch.

一My watch! Thank you. Where _______ it? [ ]

A. do you find

B. have you found

C. did you find

D. were you finding

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单项选择题

Nobody knew how he came up with this ______ idea about the trip.

A．weary

B．twilight

C．unanimous

D．weird
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