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问答题

在电机控制器或功率电子装置内安装有电容器，电容器具有[填空(1)] 和[填空(2)] 的功能。

【参考答案】

储电;放电

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相关考题

单项选择题
Bill and his family have been living in the same old building for eight years.The landlord（房东）also lives there,and usually all the tenants（房客）get alongfairly well with one another.Recently,however,there has been a change in their relations.
A nice,quiet old couple used to live there,too.The old lady would sometimes bringsome small cakes she made to Bill′s mother,who in return would give her somemeat or help her with shopping.Unfortunately,the old lady died last month.Asher husband couldn′t live alone,his grandson moved in.
The grandson,a youth of about twenty,has become a problem to Bill′s family because he is so noisy.Bill′s family members were used to peace and quiet,but the youth likes to listen to his radio late at night.Sometimes his friends came for a visit,and they also made a lot of noise.Everyone in Bill′s family has been bothered by the new comer and getting angry.
Bill′smother once politely asked the old man if he was able to sleep well at night,but it seemed that he didn′t understand what she meant and so never spoke tohis grandson about it.If he did,the grandson apparently didn′t listen,sincethings have not changed any.Everyone in Bill′s family agrees that somethinghas to be done,but no one wants to hurt the old man′s feelings or cause himany problems.
What do you think should be done?
The grandson makes a lot of noise as
A.henevercareswhethertheneighborsmightwanttoliveinpeaceandquiet
B.thewallsofthebuildingarethin
C.helikestolistentohisradioearlyinthemorning
D.friendscometovisithim
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“现代建筑不是老树上的分枝，而是从根上长出来的新株”，这一观点由谁提出的？( )
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