炮采工作面使用的乳化液配置的浓度是()
A.2~3%
B.3~5%
C.3~15%
参考答案:A
__ _in a heavy traffic jam in a taxi while you are hurrying to the airport is quite a unpleasant experience.
A.Having caught
B.Being caught
C.Caught
D.Having being caught
涂料的涂布应先涂立面后涂平面。( )