问题 问答题 简答题

单母线分段的接线方式有什么特点?

答案

参考答案:

单母线分段接线可以减少母线故障的影响范围,提高供电的可靠性。

当一段母线有故障时,分段断路器在继电保护的配合下自动跳闸,切除故障段,使非故障母线保持正常供电。

对于重要用户,可以从不同的分段上取得电源,保证不中断供电。

阅读理解

阅读理解。

     Andy: I think being honest is the most important. Honesty is the best policy(原则). It is where a good

friendship(友谊) starts. Friends must be able to trust one another. If you don't tell the truth(事实), you

may lose your friends' trust. Good friends always trust in one another and do things honestly.

     Jim: Being generous(慷慨的) is important. It means sharing things with each other and sharing makes

a friendship grow. Being generous doesn't mean you have to give your lunch money or your clothes to

others. It means we share our ideas and feelings. By sharing them, we help our friends know us better.

      Mary: I think it's necessary for us to understand a friend. Everyone needs understanding. When

friends have a problem, talking about the problem can make it easier to solve. I must try to put myself

in my friend's place, so I can understand the problem and my friend better.

1. What does Andy think is the most important to make friends?

A. Being honest

B. Being generous.

C. Understanding a friend

D. Keeping a secret.

2. Jim thinks friends should share_______.

A. their ideas

B. their feelings

C. their money

D. their ideas and feelings

3. Mary tries to put herself in her_______ place to understand her friend better.

A. own

B. friend's

C. classmate's

D. teacher's

4. Friends must be able to trust one another. "trust" means_______.

A. 表扬

B. 批评

C. 反对

D. 信任

5. When friends have a problem, _______ can make it easier to solve.

A. fighting(打架)against each other

B. throwing it away.

C. talking about the problem

D. asking the friends to forgive.(宽恕)

单项选择题