在测定化学需氧量的过程中,水中的有机物被氧化转化为()和()。
参考答案:CO2/sub>,H2/sub>O
— Look at the sign on the right.
— Oh, smoking ____ here. [ ]
A. doesn't allow
B. isn't allowed
C. didn't allow
D. wasn't allowed
建筑面积在( )万平方米以上的住宅建设工程必须实行监理。
A.2
B.7
C.9
D.5