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【单选题】
听力原文:W: Do you live near your company? M: I live in the suburbs, and my company is in the center of the city. It's an hour's drive. I enjoy the beautiful scenery along the road. I can relax myself completely. How does the man feel about driving to work?
A.
Relaxed
B.
Tired
C.
Bored
D.
Lonely
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【简答题】在PC上,以3%~5% HAc展开时,()Rf值大:
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【单选题】在 PC 上,以 3% ~ 5% HAc 展开时,( ) Rf 值最大:
A.
三糖苷
B.
二糖苷
C.
单糖苷
D.
苷元
【单选题】在PC上,以3%~5% HAc展开时,()Rf值大:
A.
三糖苷
B.
双糖苷
C.
单糖苷
D.
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E.
葡萄糖
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【单选题】在PC上,以3%~5% HAc展开时,()Rf值大
A.
三糖苷
B.
双糖苷
C.
单糖苷
D.
苷元
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