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【单选题】
气-液色谱中,保留值实际上反映的是物质间的相互作用力,这些相互作用的物质是( )
A.
组分和载气
B.
载气和固定液
C.
组分和固定液
D.
组分和载体
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举一反三
【简答题】A.By sending water directly back to the sea with great force. B.By reducing wave energy. C.By reducing beach width. D.By stabilizing beachfront construction.
【单选题】Mary ______ her shoulders when I asked her what we should do.
A.
tapped
B.
shrugged
C.
threw
D.
shook
【单选题】That is the only way we can imagine _____ the overuse of water in students' bathrooms. [     ]
A.
reducing
B.
to reduce
C.
reduced
D.
reduce
【简答题】在铁碳相图中,ECF线是共晶线,其温度为____。
【单选题】Mary is currently buying apples and oranges such that the last unit of apples has 30 units of utility and the last unit of oranges has 40 units of utility. She has allocated her entire budget. If the ...
A.
buy more apples and fewer oranges
B.
buy fewer apples and fewer oranges
C.
buy more oranges and fewer apples
D.
continue to buy the same amounts of both goods
E.
None of the above answers is correct.
【判断题】蛋白质的生物学价值,是动物吸收氮占总摄入氮的百分比,能反应被吸收蛋白质的利用程度
A.
正确
B.
错误
【判断题】江山代有才人出,各领风骚数百年的作者是清代的龚自珍
A.
正确
B.
错误
【单选题】Thai is the only way we can imagine _________the overuse of water in students' bathrooms.
A.
reducing
B.
to reduce
C.
reduced
D.
reduce
【单选题】一般性货币政策工具中,最灵活的、最常用的货币政策工具为( ) 。
A.
存款准备金率
B.
再贴现率
C.
再贷款率
D.
公开市场业务
【多选题】What should Mary do before and during the interview?
A.
Dress properly
B.
Be punctual
C.
Express thanks to the interviewer
D.
Use strong perfume
E.
Close the door after you
F.
Express herself clearly
G.
Forget important things
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