每班运送人员前,把钩工必须检查人车的()安全门或安全链等安全装置是否完好。
A、连接装置
B、保险绳
C、手动落闸
D、电机
E、自动落闸
参考答案:A, B, C, E
––Tom is ill. He is now.
–– I’m sorry to hear that. Let’s go to to see him.
A.in the hospital; a hospital
B.in hospital; a hospital
C.in the hospital; the hospital
D.in hospital; the hospital
消费者购买力的变化对期货商品需求及价格的影响要小于对现货市场的影响。()