问题 单项选择题

关于剩余电流动作保护装置的运行和管理的表述中,正确的是( )。

A.对使用中的剩余电流动作保护装置应定期用试验按钮检查其动作特性是否正常
B.采用相线直接对地短路进行试验
C.电子式剩余电流动作保护装置,工作年限一般为8年
D.运行中剩余电流动作保护器动作后,应认真检查其动作原因,排除故障后再合闸送电

答案

参考答案:A

阅读理解

阅读理解。

     Now I'm studying in the US, I find there are some differences between schools in the US and in

Vietnam.

     One big difference is the clothes students wear at school and how they look. In my country, all the

students should wear uniforms when they go to school. Boys aren't allowed to have long hair. Girls aren't

allowed to have long or colored nails (指甲).

     Another difference is about the rules for parents. In Vietnam, when we begin a new year, our parents

have to go to a meeting in our class. If they don't go to that meeting, their children won't have a grade or

a report card from school.

     However, in the US, there aren't such strict rules above.

     In Vietnam, a class is only 45 minutes and we have only five classes each weekday. When the bell

rings, all the students just sit in their classroom. They can't move to a different room, but students can in

the US.

     In Vietnam, students can't go to work because they can't find a job if they're under 18. But in the

US, many students work after school. This helps them make money. More importantly, this helps them

become more independent. They're able to do things by themselves in their own way, without asking

other people for help.

1. Which country is the writer's hometown?

A. America.          

B. The UK.        

C. China.            

D. Vietnam.

2. What are the girl students allowed to in the writer's country?

A. To have long nails.

B. To color their nails.

C. To grow their hair long.

D. To wears their own clothes.

3. What does the underlined word "independent" mean in Chinese?

A. 勇敢的            

B. 独立的

C. 依赖的            

D. 不礼貌的

4. Which is TRUE about the Vietnamese students according to the passage?

A. They have twenty-five classes a week.

B. They can design their school uniforms.

C. They don't get a report card from school.

D. They can find a job whenever they want.

5. From the passage, we can learn that _____.

A. in Vietnam, the students must sit quietly and can't move around in class

B. the US students don't have such strict rules as the Vietnamese students

C. at the end of a school year, parents in Vietnam have to go to a parents' meeting

D. American parents don't pay for their children's education because they work after school

选择题