水()
A.极性溶剂
B.非极性溶剂
C.半极性溶剂
D.防腐剂
E.增溶剂关于液体制剂常用的溶剂和附加剂
参考答案:A
“Would you like a cup of coffee or a glass of beer?” “____ will do, but milk is _____ popular with me.”
A.Neither, not
B.Both, more
C.Either, the most
D.All, the most
()清理方法容易使钢坯表面脱碳。
A、火焰
B、风铲
C、酸洗