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问题 解答题

两个棱长总和相等的长方体和正方体，它们的体积相等．______（判断对错）

订正：______．

答案

两个棱长总和相等的长方体和正方体，它们的体积不一定相等．

故答案为：×，两个棱长总和相等的长方体和正方体，它们的体积不一定相等．

单项选择题

不可以对UPS电源的蓄电池过渡（）.

A.通电

B.放电

C.充电

D.充电、放电
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阅读理解

I used to travel by air a great deal when I was a boy. My parents used to live in South America and I used to fly there from Europe in the holidays. An airhostess would take charge of me and I never had an unpleasant experience. I am used to traveling by air and only on one occasion have I ever felt frightened. After taking off, we were flying low over the city and slowly gaining height, when the plane suddenly turned round and flew back to the airport. While we were waiting to land, an airhostess told us to keep calm and to get off the plane quietly as soon as it had touched down. Everybody on board was worried and we were curious to find out what had happened. Later we learned that there was a very important person on board. The police had been told that a bomb had been planted on the plane. After we had landed, the plane was searched thoroughly(被彻底搜查). Fortunately, nothing was found and five hours later we were able to take off again.

根据短文内容判断正（T）误（F）

(      ) 1. The writer used to fly much when he was a boy.

(      ) 2. The writer’s parents used to live in South Africa.

(      ) 3. While they were waiting to land, an airhostess told them to be calm.

(      ) 4. Nine hours later they could take off again.

(      ) 5. There was really a bomb on the plane.
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