单选题Severe exposure to chlorine gas can be fatal. Chlorine gas is primarily a（）.Arespiratory irritantBskin burning agentCblood poisoning agentDnerve paralyzing irritant
单选题
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
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