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【简答题】
活动结束的形式
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皮皮学刷刷变学霸
举一反三
【单选题】The class of fire on which a blanketing effect is essential to extinguish the fire is____.
A.
Class A
B.
class B
C.
class C
D.
class D
【单选题】If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes n...
A.
stop
B.
start
C.
speed up
D.
slow down
【单选题】When something is on fire, people throw sand on it to put out the fire. The main use of the sand is to _________.
A.
protect the thing on fire
B.
add weigh to the thing on fire
C.
keep the air away from the thing on fire
D.
lower the temperature of the thing on fire
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