作用力与反作用力间的关系是()。
A、平衡力
B、作用在两个物体上,但大小不等
C、同时存在,同时消失
D、作用在同一物体上,大小相等,方向相反
参考答案:C
下列事件不是随机事件的是( )
A.东边日出西边雨
B.下雪不冷化雪冷
C.清明时节雨纷纷
D.梅子黄时日日晴
— John had nothing to do ______ the matter, ______?
— Yes, he did. [ ]
A. with; did he
B. with; didn't he
C. from; had he
D. from; hadn't he