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【单选题】
脑出血与脑梗死的CT表现相似的时期是( )。A.
亚急性晚期
B.
超急性期
C.
亚急性早期
D.
急性期
E.
慢性期
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【简答题】Foam is a very effective smothering agent and ______.A. it provides cooling as a secondary effectB. works well on extinguishing electrical firesC. can be used to combat combustible metal firesD. All ...
【单选题】Production of mechanical foam by a portable in-line foam proportioner（）.
A.
increases the size of foam bubbles formed
B.
increases the rate of foam production
C.
improves the extinguishing properties of foam
D.
gives the nozzleman more freedom of movement，since it can be placed anywhere in the hose line
【简答题】1841 年 1 月,通过非法的《穿鼻草约》,英国侵略者派兵占领了
【单选题】Foam is a very effective smothering agent and ______.
A.
it provides cooling as a secondary effect
B.
works well on extinguishing electrical fires
C.
can be used to combat combustible metal fires
D.
all of the others
【单选题】Why is the plan called 'carrot-and-stick' approach?
A.
Because it is very hard to take effect just like a carrot.
B.
Because it is too strict to student athletes just like a stick.
C.
Because it grants rewards and gives penalties together.
D.
Because it gives up a lot and sticks to some basic rules.
【单选题】Foam is a very effective smothering agent and ______.
A.
it provides cooling as a secondary effect
B.
works well on extinguishing electrical fires
C.
can be used to combat combustible metal fires
D.
All of the others
【单选题】One of the limitations of foam as an extinguishing agent is that foam ______.
A.
cannot be made with salt water
B.
is heavier than oil and sinks below its surface
C.
is corrosive and a hazard to fire fighters
D.
conducts electricity
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