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问题 选择题

鲤鱼的身体呈流线型，这有利于（　　）

A．捕食

B．游泳

C．漂浮

D．保持平衡

答案

鱼生活在水中，用鳃呼吸，用鳍游泳，鳍能控制方向和保持身体的平衡，鱼的头部和尾部较尖，躯干部宽大，身体侧扁，为梭形，可以在游泳时减少水的阻力，适于在水中生活．

故选B

多项选择题

避免阳光直接照射仪器，其目的是（）

A、防止仪器老化

B、防止视准轴偏差

C、保护水准器灵敏度

D、防止脚架扭曲
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完形填空

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（每小题1分，共5分）

M：Hi．Jenny．Nice to meet you here! Have you got everything ready for Christmas?

W：61．What about you，Mike?

M：62．By the way，have you read this news in the newspaper? Two men broke into a store near here last night and took more than $4,500 in cash．

W：63．Two young men held up my husband on the street last week in the middle of the afternoon.

M：Really? 64．Where did that take place?  

W：65．Right in front of the cinema．

A．I’m sorry to hear that

B．No．I came here to get some meat and fruit

C．Only a block from here

D．I think I can get everything ready todayE. How much did it cost you?

F. That’s nothing

G. Good luck to you

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