单项选择题

Since electrical burn victims may be in shock，the FIRST medical response is to check for（）

A.indication of broken bones
B.breathing and heartbeat
C.symptoms of concussion
D.bleeding injuries

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单项选择题

Since accumulations of H₂S gas on a ship can be dangerous to personnel，it is important to know that H₂S gas is（）.

A.lighter than air
B.heavier than air
C.a yellow gas that is easily recognized
D.mildly toxic

单项选择题

Severe exposure to chlorine gas can be fatal. Chlorine gas is primarily a（）.

A.respiratory irritant
B.skin burning agent
C.blood poisoning agent
D.nerve paralyzing irritant

单项选择题

Segregation of cargoes refers to（）.

A.separating cargoes so that the inherent characteristics of one cannot damage the other
B.separating cargoes by destination
C.classifying cargoes according to their toxicity
D.listing the cargoes in order of their flammability