提高金属板表面亲水性的方法是()。
A.镀铜
B.镀铬
C.涂布非极性膜层
D.形成氧化膜
E.涂腊克
参考答案:B, D
-How was Robert's cooking?
-Oh,pretty good.I was quite ________.[ ]
A.admired
B.interested
C.impressed
D.inspired
上升管、桥管不清扫,就会()上升管或桥管。