硅酸盐水泥的生产方法按煅烧窑结构分为回转窑和立波尔窑两种。
参考答案：错
If you are a supermarket's _____, you will get things at a lower price. [ ]
A. friend
B. member
C. customer
D. manager
将八度分成十二个均等半音的律制，称为（）。
