不定项选择题:14.如图,两平行的带电金属板水平放置。若在两板中间a点从静止释放一带电微粒,微粒恰好保持静止状态。现将两板绕过a点的轴

  • 题目分类:理综
  • 题目类型:不定项选择题
  • 查看权限:VIP
题目内容:
14.如图,两平行的带电金属板水平放置。若在两板中间a点从静止释放一带电微粒,微粒恰好保持静止状态。现将两板绕过a点的轴(垂直于纸面)逆时针旋转 ,再由a点从静止释放一同样的微粒,改微粒将 A.保持静止状态
B.向左上方做匀加速运动
C.向正下方做匀加速运动
D.向左下方做匀加速运动
参考答案:
答案解析:

Where did Michael go last year?

Where did Michael go last year?A.Russia. B.Norway. C.India.

查看答案

0.001,0.002,0.006,0.024,(  )

0.001,0.002,0.006,0.024,(  )A.0.045 B.0.12 C.0.038 D.0.24

查看答案

39. A. note

39. A. note A.poster B.bill C.report

查看答案

根据下列材料,请回答题:It was a rainy morning and the children, mainly

根据下列材料,请回答题:It was a rainy morning and the children, mainly boys with various l

查看答案

Where is the man?

Where is the man?A.At the station. B.At home. C.At the office.

查看答案