润湿剂
参考答案:
是指降低固体与液体之间的表面张力,以促使液体在固体表面上散开的浮选剂。
考考你的记忆力,根据句意及首字母补全在本课中出现的单词。
1.We are d_____ from them.
2."R_____"means "again".
3.Can you s_____ the song in English?
4.I hope you r_____ to tell him about it.
5.Do you have a s_____ friend?
6.I'm good at ping-pong. That makes me u_____.
7.Can you write a letter to me to d_____ yourself?
8.Let me i_____ my friend to you.
9.Do you know how they c_____ the festival?
10.We should be c_____ in ourselves.
建设工程要避免不断提高质量目标的倾向,这是建设工程质量控制的(, )应考虑的。
A.系统控制B.全过程控制C.全方位控制D.投资控制