问题 问答题 简答题

如何进行主要通风机的电源倒闸操作?

答案

参考答案:

准备工作:

(1)各受电开关、联络开关、送电开关都应编号,并应与图纸、操作规程上的编号一致。

(2)除紧急事故外,倒闸必须有上级主管的命令、签发的倒闸作业票,接受命令时复述。

(3)与有关单位进行必要的联系。

(4)检查接地装置、绝缘用具。

(5)检查开关、母线、合闸连杆、仪表等有无异状。

操作:

(1)按倒闸规定顺序并使用绝缘用具按顺序操作。

(2)每步操作完毕必须注意电气设备有无异样,各种仪表指示是否正常。

倒闸后:

(1)检查电气设备有无异状。正确挂好“运行”、“备用”牌。

(2)向有关方面汇报。

单项选择题
阅读理解

Recipients(接受者)of this year's Annenberg scholarships were announced on June 19. Brittany Blythe was one of them.

In seventh grade,Brittany Blythe dreamed of being a cheerleader(啦啦队队员). Her school’s coaches were less than enthusiastic. “They said. ‘I don't know how you’ll be able to do it’. ”she recalls. “‘You won’t be able to do it’.”

But Brittany,now a junior at Strath Haven High School near Philadelphia,refused to give up. And when the junior school cheerleaders won a tournament last year, she was right there,dancing and cheering with the rest of the team.

Not bad for someone whose legs were cut off below the knee when she was two years old.

Brittany,18,was born without shinbones(胫骨)—“just blood and muscle tissue,”as she puts it. When she tried to walk, her legs twisted.    

After the operation, she adapted quickly. “From day one,I basically jumped up and wanted to do everything,’’ she says. Prostheses(假肢)allowed her to move around upright. But too slowly to keep up with her friends. Brittany’s solution was to take the legs off and walk on her knees something she still does when safety and comfort permit.

She has been rarely discouraged. Other children laughed at her through the years,especially in junior high school,but she says the challenge only made her stronger. Now she’s trying to convince her coaches to let her remove the prostheses and be a flyer. The cheerleader who's thrown in the air and caught by her teammates.

Brittany doesn’t think her problems put her at a disadvantage. “My disability was the first thing I had to get through., and that’s going to prepare me for the future. ”she says. “It’s all just a test:If someone throws you a difficult problem,what are you going to do?”   

小题1: What was the coaches’ first attitude towards Brittany's dream?

A.Supportive

B.Enthusiastic

C.Optimistic

D.Doubtful小题2: What was Brittany’s reaction after the operation?

A.She abandoned herself to self-pity.

B.She refused to use the prostheses.

C.She accepted the result and tried to get used to it.

D.She challenged the children who laughed at her.小题3: What does Brittany want to achieve at the moment?

A.To stop others’laughing at her.

B.To prove her coaches wrong.

C.To remove her prostheses.

D.To be a flyer.小题4: We can learn from the last paragraph that Brittany _________.

A.doesn’t think she is better than others

B.is not well prepared for the future

C.takes a positive attitude towards life

D.likes the challenge of learning new things小题5:. What's the best title for the text?

A.A new leg,a new life

B.A new cheerleader, a new record

C.Passing the test

D.Seeking advantages