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问题 判断题

热油泵停运后，在降温过程中，注意要每隔15～30分钟盘车一次，直至泵体温度降至100℃以下为止。（）

答案

参考答案：对

解析：一般来讲，离心泵抽空时泵出口压力为零，流体打不出去，将直接打乱装置平稳操作。

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Do you have any hobbies? If students don’t have any interest e___1___ school work, they may become boring people. And that can influence their studies.

Studying without relaxing isn’t good for health. We can’t get good g___2__ if we have bad health. We should do something we like. Some people like singing, taking photos and drawing p__3__. Other people prefer collecting stamps, reading or shopping. I have a few hobbies, but my f___4___ is collecting stamps. I like it best because I can learn a lot from stamps.

Some people collect stamps because they can m__5__ money from the stamps. But I am just i__6__ in collecting them and enjoy looking at them when I am free.

Stamp collecting is becoming more and more p__7__ all over the world. I know an Australian boy and a French girl through the Internet. They both like collecting stamps. We show stamps to each other o__8__. That is cool.
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问答题 简答题

旅游者要求亲友随团活动，如何处理?
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