题目

W: Hi，dad! Come over here! Be quick! M: Yes? What for? W: There’s a football match   61    TV. Hurry up, dad? M: Yes, I’m coming. W: Let’s turn   62   the TV a little so that we won’t bother our neighbors. It’s too   late now. M: Yes. Ah, what time is it now? W: Let me have a look first. Er. It’s half past eleven by   63   ( I ) watch . M: Eleven thirty? I think   64   is high time that you went to bed now, Rose. W: But the football match is so exciting! I enjoy   65   ( watch ) football matches    just like you. I don’t want to miss such 一个物体从静止出发以加速度a做匀加速直线运动.经过时间t后,改作以t时刻末的速度做匀速直线运动,则在2t时间内的平均速度是    A.      B.          C.3at       D.