在玻璃管中放一个乒乓球并注满水,然后用软木塞封住管口,将此玻

在玻璃管中放一个乒乓球并注满水,然后用软木塞封住管口,将此玻璃管固定转盘上,处于静止状态.当转盘在水平面内转动时,如图所示,则乒乓球的位置会(球直径比管直径略小)  (  )

A.向外侧运动   B.向内侧运动

C.保持不动    D.无法判断

 

答案

B

解析:略

 

相关题目

1         2   3   
1         2   3   
如果要进行新民主主义革命时期的革命传统教育,你可以选
如果要进行新民主主义革命时期的革命传统教育,你可以选择的实地考察路线是 A.虎门销烟遗迹——天津义和团遗址——北京故宫 B.中共“一大”会
A boy was born to a couple after eleven years of marriage. They were a loving c
A boy was born to a couple after eleven years of marriage. They were a loving couple and loved the boy very much. When the boy was around two years old, one morning the husband saw a medicine bottle
 —___________ is it from here to Xing Yi Hotel ?  —About twenty minutes
 —___________ is it from here to Xing Yi Hotel ?  —About twenty minutes’ walk. A. How far           B. How long      C. How often         D. How soon   
(3分)阅读以下有关“空气成分”的卡通图,填空:
(3分)阅读以下有关“空气成分”的卡通图,填空:
下列做法或说法正确的是                       
下列做法或说法正确的是                                            A.处理废水时加入明矾作为消毒剂可以除去水中的杂质   B
A wonderful idea ________ me that day when I met with a tough problem,.   
A wonderful idea ________ me that day when I met with a tough problem,.    A. happened to        B. occurred to      C. seemed to         D. compared to
已知向量,向量与向量夹角为,且. (1)求向量; (2)若
已知向量,向量与向量夹角为,且. (1)求向量; (2)若向量与向量的夹角为,向量,其中 为的内角,且.求的取值范围.

最新题目