罪犯装卸工在装卸货时()。
A.必须戴手套
B.可以不着标记服
C.必须着专用标记服
D.不可以戴手套
参考答案:C
The boss made him work 14 hours a day. That means, he _______ work 14 hours a day. [ ]
A. was made
B. made
C. was making
D. was made to
铁路信息系统设备维修与管理应坚持什么原则?