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【单选题】
The staff who work in public places would favor the ban becauseA.
they don't have to inhale foul air.
B.
they don't have to serve smokers.
C.
they will get more tips from non-smokers.
D.
there will be a rise on their salaries.
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【简答题】矿物油在常温时的密度约为 ,水的密度为 。
【单选题】We don’t suppose this happened to him, ________?
A.
do we
B.
did it
C.
did this
D.
didn’t it
【单选题】—You can have a pet dog，but suppose you get bored with it in a few days？________？ —We won't，we promise！(2011·安徽，29)
A.
Then what
B.
All right
C.
How come
D.
So what
【单选题】We don’t suppose this happened to him, ________?
A.
did it
B.
do we
C.
did this
D.
didn’t it
【简答题】盐度小于24.9的海水，密度最大时的温度比冰点高，在冰下可以保持高于冰点温度的水层；在盐度为（）的海水中密度最大时的温度与冰点相同：24.9‰、-1.35℃，纯水在（）时密度最大。
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