一质量为2kg的物体,以5 m/s的速度匀速运动时,其动能为____J。
25
本题考查的是动能的计算,根据,计算出为25J;
(2013·江西抚州五校二模)It's a headache trying to ________ in a strange, new town. I will just take a taxi and avoid all the trouble.
A.settle down
B.work out
C.get around
D.hold out
成天忙于内部具体事务、内部运转无序是一种()
A.井蛙式自满生态
B.秋虫式自悲生态
C.封闭式无序生态
D.蚕茧式自我束缚生态