A、water
B、fuel
C、steam
D、air
更多“Care must be taken to condition the （）in the boiler to prevent scaling, and corrosion, which can weaken the pressure vessel.”相关的问题
A、Care to be not taken B、Care not to be taken C、Care to be taken not D、Not care to be taken
A、should be correctly carried out B、should correctly be taken place C、should carded with care D、must to carry out with great care
A、should be correctly carried out B、should correctly be taken place C、should carried with care D、must to carry out with great care
A、A. take great care of B、B. take great careful of C、C. taken great care of D、D. taking great care of
A、took good care of B、was taken good care C、was taken good care of D、was taking good care
A、sparking being taking place B、to spark taking place C、sparking to be taken place D、sparking taking place
A、The tank must be gas freed B、The tank must be ballasted C、The tank must be vented to the atmosphere D、The bypass valve must also be closed
A、A.The tank must be gas freed B、B.The tank must be ballasted C、C.The tank must be vented to the atmosphere D、D.The bypass valve must also be closed
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