当母线上接有m组电容器时,从投入第1组,第2组直到m组的全部投入,都应避开(),这是

题型:单项选择题

问题:

当母线上接有m组电容器时,从投入第1组,第2组直到m组的全部投入,都应避开(),这是电容器组安全运行的必要条件。

A.谐振

B.振荡

C.过电压-

D.过补偿

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
题型:单项选择题

阅读下面短文。根据要求完成下列各题。把答案写在每小题后横线上。

This is a story about a famous American woman.Her name is Helen Keller.When she was only nineteen months old.she got an illness.It made her blind(瞎的)and deaf(聋的).She couldn’t see or hear anything.So she couldn’t learn to speak.When she was six,a young teacher came and taught her to read and write.Her name was Ann Sullivan.

Later,when she was ten,Miss Sullivan took her to another teacher,Sarah Fuller.Sarah Fuller taught her to speak.Helen put her fingers(手指)on Miss Fuller’s face and into her month.In this way,she learned to speak.She went to school and became famous because she was one of the first blind and deaf persons to learn to speak.She began to write books and to help the blind in many parts of the world.Her hard work and her courage(勇气)made people in all countries love her.

小题1:How old was Helen Keller when she was blind and deaf?

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小题2:Why couldn’t she learn to speak?

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小题3:What did Miss Fuller teach her to do?

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小题4:Why did she become famous?

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小题5:What made all people love her?

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题型:单项选择题

狭义的咀嚼肌不包括()

A.咬肌

B.颞肌

C.翼内肌

D.翼外肌

E.舌骨上肌群

题型:单项选择题

宏大商业公司有一座六层的办公楼。7月,宏大商业公司向A银行贷款,将该办公楼抵押给A银行。12月,宏大商业公司因一购销合同与志新贸易有限公司发生纠纷,志新贸易有限公司向法院起诉,并申请财产保全,受诉法院裁定将宏大商业公司办公楼查封。在下列选项中哪个是正确的( )

A.法院所作的裁定是错误的,因该办公楼已事先抵押给了A银行

B.法院可以作出裁定,但应事先征得A银行同意

C.法院可以作出裁定,A银行对该办公楼仍有优先受偿权

D.法院作出裁定是正确的,但A银行因此对该办公楼丧失优先受偿权

题型:单项选择题

细菌性痢疾的肠溃疡特征为()。

A.溃疡呈环形与肠的长轴垂直

B.溃疡呈长椭圆形与肠的长轴平行

C.溃疡呈烧瓶状㈠小底大

D.溃疡表浅呈地图状

题型:单项选择题

美国全国公共关系协会(PRSA)成立的时间是()

A.1978年

B.1955年

C.1948年

D.1947年

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