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【单选题】
样品中的山梨酸在酸性溶液中，用水蒸汽蒸馏出来，然后用K2Cr2O7氧化成丙二醛和其它产物，丙二醛与硫代巴比妥酸反应，生成红色物质，颜色的深浅与山梨酸含量成正比。应选择()波长。A.
530nm
B.
225nm
C.
110nm
D.
650nm(包装专业)
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举一反三
【单选题】听力原文：M: I think it' s starting to snow. W: Starting to snow? The ground' s already covered. What does the woman mean?
A.
They're ready for the snow.
B.
Once it starts, it'll snow a lot.
C.
It has been snowing for some time.
D.
The winter has just begun.
【简答题】It Was in that big room__________I saw the great man．
【单选题】听力原文：M: I think it's starting to snow. W: Starting to snow? Look, the ground's already white. Q: What does the woman mean? (16)
A.
It has just begun snowing.
B.
She doesn't like snowy days.
C.
It has been snowing for some time.
D.
She doesn't think it's going to snow.
【简答题】I saw the man (knock) ______ down by a car in the street.
【单选题】听力原文：M: I think it's starting to snow. W: Starting to snow? The ground's already covered. Q: What does the woman mean? (19)
A.
The winter has just begun.
B.
Once it starts, it'll snow a lot.
C.
They're ready for the snow.
D.
It has been snowing for some time.
【单选题】下列项目中不属于交易性金融资产的实质性程序的是( )。
A.
向被审计单位核实其持有目的
B.
检查交易性金融资产核算范围是否恰当
C.
监盘库存交易性金融资产
D.
对期末结存的交易性金融资产,核实被审计单位持有的目的和能力
【简答题】国际民航组织的总部位于:
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