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问题 解答题

小强家有一只圆柱形铁皮油桶，从内量得底面直径是3分米，高是4分米，如果汽油每升的质量是0.72千克，问这只油桶能灌得下20千克的汽油吗？

答案

3.14×（3÷2）2×4×0.72=20.3472（千克），20.3472>20，所以这只油桶灌的下20千克的汽油。

改错题

短文改错（共10 小题，每小题1分，满分10分）

My brother Tom was very selfish when he was little boy. He did not want share things with

other people. For example, when he bought a chocolate cake, he put them in a secret place,

that I couldn’t find. Then he ate it all by himself. He never helped other. He said he is busy.

In other words, a game of tennis made him very busy. He did not care if something that he did

it made people angry. For instance, one night he played strongly and loud music till four o’clock

in the morning. But he is difference now. He often helps grandma with houseworks, helps mom

with cooking and helps his classmates with their lessons.
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多项选择题

GPS静态控制网野外观测作业时，下述做法正确的是（）

A.电话、对讲机等无线设备在使用时远离GPS接收机（10m以上）

B.GPS测站应远离大面积水域

C.观测时段最好选择在白天，以提高GPS信号接收质量

D.接收机天线高量测1次，并做好记录

E.各测站应同步观测
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