空气干燥基成分中，煤是没有水分的。

Mrs. Smith persuaded her husband __________the right th...

单项选择题Mrs. Smith persuaded her husband __________the right thing.

Dogs have a very __________sense of smell.A.clearB.nice...

单项选择题Dogs have a very __________sense of smell.

制冷机突出部分与配电盘之间的距离和主要通道的宽度应不小于( )m。A.0.7B.0.8C.1.0D.1.5

单项选择题制冷机突出部分与配电盘之间的距离和主要通道的宽度应不小于( )m。