【单选题】电子在匀强磁场中做匀速圆周运动,下列说法正确的是( )
【简答题】以单词的 正确形式 完成句子 (请将完整答案填写在表格内, 包括首字母) 小题1: The Chinese _______ (文明) is one of the oldest in the world. 小题2: Lin Tao works very hard and her g______ is to go to Beijing University. 小题3:The temple was st...
【简答题】What was the cab driver doing when the author wanted to take the taxi? (para. 1&2) 2. Whom did the driver talk about with the author? (para. 3,4&5) 3. How long had the driver and Ed been friends? (par...
【判断题】环境水样的色度越深,则其浊度就越大。( )[扬州大学2014年研]
【单选题】在圆周运动中下列说法正确的是( )
B.
由公式 可知,做圆周运动半径大的物体,角速度一定小
C.
飞轮转动的角速度越大,轮上同一点的线速度也越大
D.
由公式 可知,物体转动的半径与它的线速度大小成正比