已知一个电容器的电容为8μF,计算在50Hz时的容抗是多少?电压为220V时,计算通

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问题:

已知一个电容器的电容为8μF,计算在50Hz时的容抗是多少?电压为220V时,计算通过这个电容的电流是多少?

考点:变电检修工考试变电检修高级工变电检修高级工题库
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阅读理解。

     A famous foreign company in China wanted a clerk for its public relation department.

     A beautiful girl with a master’s degree went through a lot of challenges and her name was on the list. In

the final stage she faced an interview together with another girl. Both of them were outstanding, not only in

looks but also in education.

       The girl was successful in the interview. It seemed that she would get the chance. At last the examiner asked her, “Can you come to the office next Monday?” Shocked by unexpected question, the beautiful girl

couldn’t make a decision at the moment. So she said , “I have to talk with my parents before I give an

answer.” The examiner felt surprised but said calmly. “If so, let’s wait till you are ready.”

     The next day, the girl came to tell the examiner that her parents had agreed to let her begin word next Monday. But the examiner said regretfully “Sorry, another suitable candidate has got the job. You had

better try another place.” The beautiful girl was surprised. She asked for an explanation and was told,

"What is needed here is a person who knows her own mind.”

     That was how a good opportunity right under the nose of a beautiful girl ran away.

1.The beautiful girl wanted to ask her parents for advice because ______.

A. she didn’t like the job

B. she didn’t expect the examiner would ask such a question    

C. she didn’t want to answer the question     

D. her parents would be angry if she didn’t ask them

2. We can learn from the passage that_______.

A. the company lost its best clerk    

B. no girl got the job    

C. the other girl who failed at the last interview might got the job.    

D. the examiner was very pleased with the girl

3. The examiner regarded ______ as the most important.

A. a person’s confident      

B. a person’s knowledge      

C. a person’s age          

D. a person’s beautiful looks

4. The underlined phrase “right under the nose of” probably means_______.

A. 就在鼻子下          

B. 想要得到的    

C. 没有把握的          

D. 就在眼前

5. The best title for the passage above might be ______.

A. Make Decision With Your Parents    

B. A Successful interview    

C. Use Your Own Mind      

D. Answer the Examiner’s Question Quickly

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下列属于共生现象的是

A.苏云金杆菌杀灭松毛虫

B.链球菌使人患扁桃体病

C.真菌引起棉花枯萎病

D.真菌与藻类形成地衣

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下面各句中有歧义的一句是( )。

A.我不揍扁了他才怪
B.三个年轻人的热情和姿态使我大受鼓舞
C.他吩咐我领人收拾收拾东西
D.没有人想到,他和儿子彼此扶助,完成了一个残疾者几乎无法完成的事情

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()是利用生物对环境污染产生的反应和变化进行环境污染程度的监测和评价环境质量状况的一种生物技术。

A.环境常规监测

B.环境自动监测

C.环境遥感监测

D.环境生物监测

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