题目

完形填空;通读下面的短文,从A、B、C三个选项中,选出一个最佳选项填空,使短文意思通顺,结构完整. Nowadays,WeChat is becoming more and more (1)   in China.No matter where we are,we can sign up and send text or voice messages to our friends.We can also find a stranger to talk to by shaking the (2)    .Another funny function(作用 ) is that WeChat can help to search for people (3)   live nearby with the program on.Many people like this function,(4)   it can help them to find more people who they may know如图所示,在电场强度为E的匀强电场中,一个电荷量为q的正点电荷,沿电场线方向从A点运动到B点,A、B两点间的距离为d.在此过程中电场力对电荷做的功等于( )A.B.C.qEdD.
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