起重机作业后,起重臂应转至()
A、顶风方向
B、顺风方向
C、挡风方向
参考答案:A
珠穆朗玛峰最高处海拔8844米,吐鲁番盆地低于海平面155米,两地的相对高度为[ ]
A.8689米
B.8999米
C.9899米
D.8000米
Our monitor was absent. Otherwise I _________ the chair.
A.would not take
B.didn't take
C.hadn't taken
D.wouldn't have taken