每季度监测出水口处水的电导率,应( ):
A.≤17µS/cm(25℃).
B.>15µS/cm(25℃).
C.≤14µS/cm(25℃).
D.≤15µS/cm(25℃).
E.≤16µS/cm(25℃).
正确答案是D