A:Are you wearing
B:Did you wear
C:Have you wor
D:Were you wearing
如图所示,在同一竖直面内,小球a、b从高度不同的两点,分别以初速度va和vb沿水平方向抛出,经过时间ta和tb后落到与两抛出点水平距离相等的P点,若不计空气阻力,下列关系式正确的是( )
为下列句子排序.组成一段完整通顺的对话。
(____)A.Nice to meet you too.
(____)B.Where are you from?
(____)C.Mum,this is Mike.He is my new friend.
(____)D.I am from Canada.
(____)E.Hi,Mike.Nice to meet you.