选用方框内的单词填空。 about love food drink milk (1) —Would you like some tea?—No, I'd likesome . (2) —What would you like to , Dad?—Tea. (3) — Beef is my favourite . What you, Mum?—I chicken. 答案:【1】milk
【1】drink
【1】food【2】about【3】love
下列说法中正确的是:
A.
滑动摩擦力的大小与正压力成正比
B.
滑动摩擦力可以跟物体的重力无关
C.
滑动摩擦力的方向总是与物体的运动方向相反
D.
滑动摩擦力总是对物体的运动起阻碍作用