蒸汽发生器 steam generator

1、James Watt（）the steam engine.

James Watt（）the steam engine.Awas inventingBinventedChad inventedDhas invented

2、STEAM研究的患者为（）

STEAM研究的患者为（）A轻度哮喘患者B重度哮喘患者C轻中度哮喘患者D中重度哮喘患者

3、Voltage generated by most AC generator

Voltage generated by most AC generators is fed from the machine to the bus by means of（）.Abrushes on a commutatorBbrushes on slip ringsCslip rings on a commutatorDdirect connections from the stator

4、The engine（）smoke and steam.

The engine（）smoke and steam.Agives upBgives awayCgives inDgives off

5、Steam smoke will occur when（）.

Steam smoke will occur when（）.Aextremely cold air from shore passes over warmer waterBwarm dry air from shore passes over cooler waterCcold ocean water evaporates into warm airDcool rain passes through a warm air ma

6、Before starting a reciprocating, steam

Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）.Aopen the steam line mot valveBdrain the steam cylinderCclose the steam cylinder drainsDopen the liquid cylinder drai