用硫酸铝做混凝剂时，其合适的PH值范围为：（）
A.4.5-5
B.5.5-6.5
C.6.5-7.5
D.6.0-8.4
参考答案：C
— Tony, you are ____ making so much noise while I am working. Can't you keep quiet for a while?
— Sorry, Mum. I won't do it again. [ ]
A. constantly
B. necessarily
C. previously
D. regularly
装修能提取惠州住房公积金吗？
