循环水场5项水质指标是?控制值为?
参考答案:
五项指标为:PH值:6-9、浊度≤20NTU、含油量<10mg/L、余氯:0.2-1.0mg/L、总铁<2.0mg/L。
高压隔离开关运行时的温度不应超过( )℃。
A.60
B.65
C.70
D.75
— I'm sure I will get good grades (成绩) in the graduation exam. — If so, I believe your parents will ______ the result.
A. be satisfied withB. be angry aboutC. be bored ofD. be worried about