用硫酸铝去除水中的浊度时,最佳PH值为()。
A.6.5~7.5
B.6.0~7.0
C.6.5~7.0
D.6.5~8.5
参考答案:A
— Hebi is really a beautiful city and there are many places of interest.
— So it is. Why not stay here for ______ two days? [ ]
A. other
B. others
C. the other
D. another
发电机定子线棒最高与最低温度间的温差达8℃或定子线棒引水管出水温差达8℃时,应查明原因并加强监视,此时可以降低负荷。