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问题 单项选择题

在追越过程中，被追越船的协助避让行动为：（）。

A.只要航道情况和周围环境允许，就应同意追越船追越

B.尽可能让出部分航道，适当减速，减少两船并行时间，使追越船迅速通过

C.前方发现情况及时通知追越船注意

D.以上都是

答案

参考答案：D

改错题

短文改错。

We all know that healthy is very important to us. Both         1.          

study and work depend by strong bodies. Doing sports       2.          

and games help us keep strong and healthy. If we do not     3.          

take any exercise, we may feel tired but get sick easily.        4.          

There're many different kinds of sports we can do them,      5.          

such as playing ball games, running, walking and swim         6.          

However, now we have too much homework to do in         7._____

every day. We hope that we'll be giving less homework       8.          

and have more time take part in sports. We also hope         9._____

that our school can hold the sports meeting every term.          10.          
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单项选择题

某车间想利用一台离心泵，把储液槽液面压强101.2K（A）293K的清水送到水塔内，其流量和扬程都符合要求，泵铭牌标出的允许汽蚀余量[△h]=3.2m。设吸入管路中的全部压头损失为1.5m，已知293K时水的相对密度为0.998，饱和蒸气压为2.33KPa，则该泵的允许安装高度为（）。

A.6.9m

B.8.6m

C.5.4m

D.10.1m
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