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问题 单项选择题

从班委会5名成员中选出3名，分别担任班级学习委员、文娱委员和体育委员，其中甲、乙二人不能担任文娱委员，则不同的选法共有( )种。

A．24

B．26

C．30

D．32

E．36

答案

参考答案：E

解析：

[分析]： 分三个步聚完成，第一步从5人中选取1人担任文娱委员，共有

＝3种选法；第二步选学习委员，共有

＝4种选法；第二步选体育委员共有＝3种选法，总的不同选法为·

·

＝36(种)

补全对话，情景问答
情景交际：根据对话内容，从方框内选择合适的句子补全对话。(有两项多余)
A. How can I get there?
B. How much does it cost?
C. When are we going there?
D. It's the right time to go there now.
E. Why not call a taxi to go there with your friends?
F. Our sightseeing bus will take you around the city.
G. Could you introduce me a nice place for vacation?
M: Good morning. Can I help you, madam?
W: Yes.   1   
M: OK. Qingdao is a nice place to visit.   2   The weather is neither hot nor cold.
W: Sounds good.  3   
M: You can get there by train.
W: Shall I visit places of interest by bus in Qingdao?
M: Sure.  4   
W: Really perfect.  5   
M: 580 yuan each person. It includes hotel and meals.
W: Well, it's nice. I'd like to book (预定) the tour for two.
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多项选择题

社会促进现象包括（）。

A.光环效应

B.结伴作用

C.观众效应

D.异性效应
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