居民生活中常用的消毒方法是()。
A.臭氧消毒
B.ClO消毒
C.紫外线消毒法
D.氯化消毒
E.过量氯消毒法
参考答案:D
—He’s not married Laura, ____?
—____. They will celebrate their one year of marriage this Sunday.
A.has he; Yes
B.is he; Yes
C.has he; No
D.is he; No
何谓金属腐蚀和金属侵蚀?它们之间有何区别?