— What's the ________ of the book?

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问题选择题

— 10 dollars.

[ ]

A. price

B. number

C. color

D. much

答案

答案：A

选择题

In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.

A．signal

B．chance

C．mark

D．measure

单项选择题

塑料管道埋深，应根据工程要求及铺设地段的土质和环境条件等因素符合长途塑料管道埋深要求的规定，高等级公路中央分隔带的最上层管面至路面埋深应（）米

A.≥0.6

B.≥0.8

C.≥1.0

D.≥1.2