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【单选题】
葡萄糖是自然界分布最广且最为重要的种单糖,植物可通过光合作用产生葡萄糖。它是一种多羟基醛。水溶液旋光向右,故亦称“右旋糖′′。葡萄糖是活细胞的能量来源和新陈代谢中间产物。1个葡萄糖彻底生成CO和HO生成多少还原当量A.
10
B.
12
C.
14
D.
16
E.
18
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举一反三
【单选题】Food packages, bottles and tins for drinks can cause ______.
A.
air and water pollution
B.
both a litter problem and a waste of resources
C.
to pay for the service
D.
to produce the receipt
【单选题】What can be inferred about the irony mentioned in Paragraph 3?
A.
Scientists and thieves both opened the coffins.
B.
Only clever people could be this type of thief.
C.
Nobody wants to be a thief but is forced to sometimes.
D.
This kind of thief is respected by some people.
【单选题】Job sharing is popular with young mothers mainly because______.
A.
they can take care of both work and family
B.
they are over ideal working ages
C.
they seek equal opportunities with men
D.
they have difficulty finding full-time jobs
【简答题】BOT(建设-经营-转让)
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