工程质量自控主体有( )。
A．施工单位
B．建设单位
C．监理单位
D．质量监督站
参考答案：A
— Excuse me. You smoke here.
— Sorry, I won't do it again. [ ]
A. are supposed to
B. had better
C. aren't supposed to
D. don't suppose to
铁细菌一般能生活在含氧（）但溶有较（）铁质和二氧化碳的水中。（填“多”或“少”）
