下列化学消毒剂中,可用于空气消毒的是()
A.2%戊二醛
B.75%乙醇
C.2%过氧乙酸
D.3%过氧化氢
E.0.5%氯己定
参考答案:C
The government should develop system to predict when wildfires occur and
give warnings in time.
A.previous
B.reliable
C.reasonable
D.responsible
有机酸对金属零件表面会产生强烈的(),因此应严格限制机油中有机酸的含量。
A.磨损
B.保护
C.腐蚀
D.润滑