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问题 选择题

有下列生活，生产现象：

①用两个钉子就可以把木条固定在墙上．

②从A地到B地架设电线，总是尽可能沿着线段AB架设．

③植树时，只要确定两棵树的位置，就能确定同一行树所在的直线．

④把弯曲的公路改直，就能缩短路程．

其中能用“两点之间，线段最短”来解释的现象有（　　）

A．①②

B．①③

C．②④

D．③④

答案

根据两点之间，线段最短，得到的是：②④；

①③的依据是两点确定一条直线．

故选C．

单项选择题

Ban the Band

Every year, our school has a dance for all the students. It’s a little funny seeing friends in clean shoes and trousers or colorful (1) , instead of the usual school uniform.

Most of us think the dance is great (2) even the teachers enjoy being there. (3) , two weeks ago someone said that there would be no (4) band this year— only CDs. "I don’t (5) it!" Amy cried out during the lunch break.

"Someone said the school couldn’t (6) a band, and they think it’s too noisy anyway, "added Daniel.

"Well, I don’t think it’s (7) enough without a band!" declared Angela, "and I’m going to see what can be done. "

Angela was as good as her (8) . In the afternoon she went to see the school headmaster who agreed to give the (9) some more thought. And he suggested that one (10) for having a band was to increase the price of each ticket from MYM5 to MYM10. Angela had to (11) out whether the students would like to do that."I need all of you to help me, " she (12) to our group before school the next day. "Mr. Berry gave me a list of all the names, and suggested we ask each one their (13) about the band and the extra cost. " (14) the day we asked around as Angela suggested, and wrote down people’s feelings about the band and the cost. We were amazed how much (15) there was for the band and everyone agreed to pay the extra MYMS."I’m surprised, " smiled Mr. Berry, when we gave him the (16) . "I really thought that only a few people (17) their band and that the cost would be too high. OK. Angela, your next (18) is to find a good band and line them up for the dance. "Angela was all smiles and (19) the news to Amy and Daniel. "You’re (20) , " smiled Daniel to Angela as he thought how close they came to having a less than perfect dance.

15（）

A.trust 

B.money 

C.support 

D.care
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单项选择题

微处理器按其字长可以分为( )。

A．4位、8位、16位

B．8位、16位、32位、64位

C．4位、8位、16位、24位

D．8位、16位、24位
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