问题
单项选择题
Corrosive liquids and acids should have which kind of label?（）
A.Skull and crossbones
B.Yellow and white
C.Red and white
D.White and black
答案
参考答案：D
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Corrosive liquids and acids should have which kind of label?（）
A.Skull and crossbones
B.Yellow and white
C.Red and white
D.White and black
参考答案：D