A:will begin
B:is beginning
C:begins
D:has begun
一质点做匀速直线运动,现对其施加一恒力,且原来作用在质点上的力不发生改变,则( )
岑参《白雪歌送武判官归京》中想象之笔,以春花比喻冬雪,咏雪的千古名句是:____,____。
Excuse me for breaking in, ________ I have some good news to tell you.