覆膜以透明塑料薄膜过热压覆贴到印刷品表面，起 ___ 的作用。
参考答案：保护及增加光泽
The boss often ______ the workers ______ for 12 hours a day.[ ]
A. make, work
B. makes , to work
C. makes , work
D. make , working
ZB3阀结构产品需要对进出油口。
