A:玻利瓦尔
B:拿破仑
C:克伦威尔
D:罗伯斯庇尔
我国人口最多的少数民族是( )
如图所示,在匀速转动的水平圆盘上离转轴某一距离处放一小木块,该木块恰能跟随圆盘做匀速圆周运动而不发生相对滑动,则在改变下列哪种条件时,物体仍能与圆盘保持相对静止( )
Hello,friends! My name is Jack.I am a Chinese boy.My favourite food is chicken.I like beef noodles,too.I don't like fish but egg is OK.Potatoes are my favourite vegetable.My favourite fruit is bananas.They are so sweet.