下列不属于轿车用的电动玻璃升降器组成部分的是（）。
A. 电动机
B. 减速器
C. 导向板
D. 起动机
You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）
A. Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned
B. The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank
C. The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue
D. Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
冲裁模按照工序组合的形式同样可以分为复合冲裁模、（）和连续冲裁模。
冲床的装模高度是指滑块在（）时，滑块下表面与工作台垫板上表面的距离。
微信支付 
支付宝支付