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单项选择题

汽油的质量是用（  ）表示的

A．甲烷值
B．辛烷值
C．戊烷值
D．丙烷值
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涂膜防水层的平均厚度应符合设计要求，最小厚度不应小于设计厚度的( )倍。
A.0.80
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C.0.85
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单项选择题
Throughout history, more than a few famous people were vegetarians. For example, Pythagoras, the famous Greek mathematician who lived in the fifth century B. C., kept to a wimple diet of bread, honey, and vegetables. Plato and Aristotle were also vegetarians, The poet Percy Bysshe Shelley became a convert to vegetarianism at twenty-one and later wrote a pamphlet in its defense. And Count Tolstoi, the Russian author famous for War and Peace, not only ate no animals; he would eat no eggs. 
A、Most authors have been vegetarians.
B、Some vegetarians eat eggs.
C、Most vegetarians are men.
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