如图所示,平行板电容器电容为C,带电量为Q,板间距离为,今在两板正中央处放一电荷

题型:选择题

问题:

如图所示,平行板电容器电容为C,带电量为Q,板间距离为,今在两板正中央处放一电荷,则它受到的电场力大小为( )

A.

B.

C.

D.

考点:带电粒子在复合场中的运动
题型:选择题
Do you want to be a good child?
I have a friend whose parents live in another city. One day I went to see her. We had a nice conversation. Then she wanted to 21 . So she dialed the number , but then she put down the phone. After about fifteen seconds, she dialed the number again “I, Mom.”
Later I asked , “22 did you dial the number twice?”She smiled, “My parents are old and 23 . They can’t get close to the telephone quickly. I always do so when I call them. I just want to give them enough time to answer the call.”
My friend is a good girl. She is 24 thinking about her parents. You also want to be a good child, right? Please remember to 25 your parents in every situation, not just on some important days.
小题1:
A.make a call B.pay a visitC.have a rest D.have a walk
小题2:
A.HowB.WhatC.whyD.When
小题3:
A.fastB.slowC.healthy D.careless
小题4:
A.alwaysB.never C.seldomD.sometimes
小题5:
A.look after B.think of C.ring upD.listen to
题型:选择题

某商店举办有奖销售活动,办法如下:凡购买货物满100元得奖券1张,多购多得,现有100000张奖券,设特等奖1个,一等奖10个,二等奖100个,那么1张奖券中特等奖 [ ]

A .不可能

B.一定

C.不太可能

D.很有可能

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在公司成立以后增发新股时,发行价格由股东大会或______决定。

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软件工程研究的内容主要包括:______技术和软件工程管理。

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以下哪项不属于BBOSS中数字电路出租业务套餐()

A、区内数字电路出租

B、本地区间数字电路出租

C、地区间数字电路出租

D、国际电路出租

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