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问题 多项选择题

电动机启动时应满足()。

A．启动时，对电网造成的电压降不超过规定的数值

B．启动功率应超过供电设备和电网的过载能力

C．电动机的启动转矩不应大于传动机械的静阻转矩

D．启动时，应保证电动机及启动设备的动稳定和热稳定性

答案

参考答案：A,D

秦末农民起义中以少胜多的著名战役是

A．牧野之战

B．城濮大战

C．长平之战

D．巨鹿之战
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完形填空

当你遇到下面这些问题时，你会怎么解决呢？请对以下问题和解决办法给予合理的配对。

Problems:

小题1:Some boys are swimming in the river without permission.

小题2:Sometimes you just get so angry about something.

小题3:You cheat(作弊) at school because you are afraid of failing the exam.

小题4:Someone in our district often wastes water.

小题5:You like to play computer games and spend too much time on them.

Solutions:

A．Work harder at your lessons .If you have problems at school, just turn to your teachers

B．Tell them to leave the river quickly. It is dangerous.

C．Make a time table and reduce the time on computer games little by little.

D．Use your pen to tell your feelings. Write down why you are angry or draw it on a paperE. Put up some posters to ask him or her to save water.
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