问题
单项选择题
Camphor oil is classified as a（）.
A.Grade A flammable liquid
B.Grade C flammable liquid
C.Grade D combustible liquid
D.Grade E combustible liquid
答案
参考答案：C
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Camphor oil is classified as a（）.
A.Grade A flammable liquid
B.Grade C flammable liquid
C.Grade D combustible liquid
D.Grade E combustible liquid
参考答案：C