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问题 单项选择题 A1/A2型题

对于儿童期常见的心理一行为问题，下列哪种在女童中的患病率高于男童（）

A.注意缺陷多动障碍

B.习惯性抽动

C.儿童癔症

D.儿童孤独症

E.品行问题

答案

参考答案：C

选择题

一株豌豆自花传粉后，所结的豌豆有圆粒也有皱粒，这株豌豆是[ ]

A．显性纯合子

B．隐性纯合子

C．杂合子

D．上述三种可能都有
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选择题

Aunt Mary is crazy about shopping. She must be snapping up the bargains in the department store during

such a sale, _____? [ ]

A. mustn't she?

B. isn't she

C. needn't she

D. doesn't she

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