题目内容

The design of for a flash type evaporator is of critical importance because it must provide an optimum feedwater spray pattern that facilitates the flashing process, and it must also maintain a pressure differential between successive stages（）

A. condenser
B. flashing device
C. lashing device
D. vacuum pum

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供应

上、下山提升运输过程中，行车时行人者（在行车过程中下扒钩有人上行，追究下扒钩工、信号工的责任，上扒钩有人下行，追究上扒钩工、信号工的责任），各罚款（）元，记严重“三违”一次。

A. 50
B. 100
C. 200

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