A:当 ω>2Kg3L 时,A,B相对于转盘会滑动
B:当 ω>Kg2L 时,绳子一定有弹力
C:ω在 Kg2L<ω<2Kg3L 范围内增大时,B所受摩擦力变大
D:ω在 Kg2L<ω<2Kg3L 范围内增大时,A所受摩擦力不变
(report报告;umbrella雨伞)
Cities
Weather
Beijing
It's sunny, but it will be ____ in the afternoon.
Qingdao
The weather is fine and ____.
Harbin
It's snowy and ____.
Xi'an
It's sunny and warm.
Guangzhou
It's ____ and ____
下列说法正确的是( )