单项选择题

A.Smoking can lengthen life expectancy.
B.Smoking can shorten life expectancy.
C.We haven't found out yet.
D.There is no connection between smoking and life expectancy.

A.Smoking
B.
B.Smoking
C.
C.We
D.
D.There
E.
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单项选择题
A.It's useless.B.It's unnecessary.C.It's doubtful.D.It's helpful.
A.It's
B.
B.It's
C.
C.It's
D.
D.It's
E.
单项选择题
某建筑装饰公司承担了某宾馆200套客房的装修施工任务。施工按先木门。窗安装、吊顶后铺设实木地板,最后对吊顶及墙面进行涂饰的施工顺序。在涂料施工中,为防止门扇、玻璃及木饰面被污染,在施涂工作面周边粘贴美纹纸。吊顶工程中的预埋件,钢筋吊杆和型钢吊杆应采取的表层处理方法是( )。
A.防水处理
B.防碱处理
C.防锈处理
D.防腐处理
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