按照搬运空间不同，搬运设备可分为（）
A.平面搬运设备
B.高位搬运设备
C.人力搬运设备
D.电动搬运设备
参考答案：A, B
The government spokesman has to ___ his words before responding to reporters.[ ]
A. pass
B. weigh
C. cover
D. express
