在起升过程中，当吊钩滑轮组接近起重臂（）时，应用低速起升，严防与起重臂顶撞。
A.2m
B.3m
C.5m
参考答案：C
If you have any problem, you can _____me for help. Which is wrong?[ ]
A. come to
B. ask
C. turn around
D. turn to
各事业部通常宜被确定为____。
