问题 问答题 简答题

GB7588规定的安全电路元件指的是什么?

答案

参考答案:

指的是主接触器和用于安全电路的继电器和接触器,如门联锁接触器它应符合下列要求:它的动断触点中的一个闭合,则全部动合触点断开,它的动合触点中一个闭合,则全部动断触点断开,这种安全电路元件的触点是必须常闭,动静触点的接触为桥式触点。保证失电时常开触点可靠断开,得电时常闭触点可靠断开。

完形填空

第二节 (共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

The organization,Keep Time for Children,was started in 2002 to make people realize the importance of family time on weekends,particularly for families with school age children.  51

We will try to help parents take one day off on weekends to be with their family.

52  What children want and need most is to spend time with their parents,not with toys or taking part in activities.But with more and more people working on weekends,many children of school age don’t see their parents anywhere near as often as they should.

53  The movement is designed for families of all types and sizes under increasing pressure to work on weekends.Because weekends are the very time when school age children are at home and in need of their parents.we are going to put forward a Family Day Bill(议案) to the government.  54   It is aimed to solve the problems of increasing”shift (换班的) - parenting”and of young children being left “home alone”on weekends.

55  If parents have a day off,they can spend a lot of time and energy with their children to share their happiness.

A.Keep Time for Children is now starting a movement.

B.The law is likely to make sure that parents take good care of their children.

C.Our aim is mainly to encourage parents to spend time with their children.

D.An American set up the organization.E.It would give every parent of children under the age of 16 the fight in law to a weekend day off each week.

F.Our time is the most important thing that we can give our children.

G.Parents who do not share enough time with their children are to blame.

选择题