如图所示，带负电的金属环绕轴OO′以角速度ω匀速旋转，在环左侧轴线上的小磁针最后平衡的位置是( )_刷题宝

题干

如图所示，带负电的金属环绕轴OO′以角速度ω匀速旋转，在环左侧轴线上的小磁针最后平衡的位置是( )

A：N极竖直向上

B：N极竖直向下

C：N极沿轴线向左

D：N极沿轴线向右

上一题下一题 0.0难度选择题更新时间:2019-05-17 01:48:24

答案(点此获取答案解析）

C

同类题1

一个两位小数精确到十分位是5.0，这个数最小是（　　）

同类题2

从方框中选择合适的选项补全对话。

(Mary's family are in a restaurant.)

Waiter: Good afternoon! Can I help you?

Dad: Yes, please.____

Mary: A large bowl (碗) of noodles with carrots and beef. I'm hungry.

Dad:____

Mary: Yes. A glass of apple juice.

Dad: OK.____

Mum: Just a bowl of beef soup.

Dad: All right.____

Waiter: Anything else? Would you like some chicken?____

Mum: Yes, a small piece, please.

Waiter: No problem.

A. What about you, darling?

B. It's delicious.

C. Anything to drink?

D. Are you ready to order?

E. What would you like, Mary?

F. And I'd like thirty dumplings and a cup of black tea.

G. How many do you want?

同类题3

下列句子中，没有语病的一项是（）

同类题4

是____图形，它有____条对称轴。

同类题5

—Have you seen the movie Rush Hour?

—Yes. I__________ the movie with my friend last night.

小学学科试题库

初中学科试题库

高中学科试题库