在海南举办的大力士比赛中,有一个项目是把车轮推上台阶。下面把车轮推上台阶的四种方法,推力的作用点相同,推力的方向不同,如图所示,则哪一种推法最省力 [ ]
A.
B.
C.
D.
答案:C
I spent all the money __________ for rainy days, so I started my part-time job. But it would be some time before I was ___________.
A.put aside, in the black
B.put away, in the red
C.push aside, feeling blue
D.taken away, green with envy
如何看出宝宝缺铁了?