单选题Which of the listed characteristics can be applied to R- 12 vapor?（）AIt is corrosiveBIt is odorlessCIt is visible as h blue fogDIt has a distinctive taste
单选题
Which of the listed characteristics can be applied to R- 12 vapor?（）
A
It is corrosive
B
It is odorless
C
It is visible as h blue fog
D
It has a distinctive taste
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