渗透探伤前,零件表面的油脂不主张采用哪种方法去除?()
A、蒸汽除油
B、碱性清洗剂清洗
C、溶剂清洗
D、热水清洗
参考答案:D
When she realized that the bike______towards her, she quickly turned aside.
A.ran
B.was running
C.had run
D.has run
鸡内金用于消食的最佳剂型是()
A.汤剂
B.丸剂
C.丹剂
D.膏剂
E.散剂