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问题 单项选择题

通过生活在另一种文化或亚文化环境中和参与被观察人的日常生活而收集资料的方法是（）

A.深入访谈

B.专题小组讨论

C.选题小组讨论

D.参与性观察

E.案例调查

答案

参考答案：D

句型转换

根据要求完成句子

1. He is too young to look after himself.(改为同义句)

    He is not _______ _______ to look after himself.

2. My parents allow me to stay up until 9:30 pm. (改为同义句)

    I _______ _______ to stay up until half _______ nine.

3. We can't decide when we should go to walk. (改为同义句)

    We can't decide _______ _______ go to school.

4. He walked so fast that I couldn't follow him. (改为同义句)

    He walked _______ fast _______ _______ _______ _______ him.

5. I have some ideas. It may help. (合并成一个句子)

    I have some ideas ________ ________ help.

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多项选择题

宽频探头的接收方式有哪几种

A．选频接收

B．动态接收

C．宽频接收

D．高频接收

E．二次谐波接收
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