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【简答题】
D-葡萄糖的α和β异头物的比旋分别为+112.20和+18.70。当α-D-吡喃葡萄糖晶体样品溶于,比旋将由+112.20平衡至+52.70。计算平衡混合液中α和β异头物的比率。假设开链形式和呋喃形式可以忽略不计。
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相关题目:
【单选题】单组分体系的固-液两相平衡的p-T曲线如图4-32所示,则( )【图片】
A.
Vm,l=Vm,s
B.
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C.
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D.
无法确定
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B.
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A.
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B.
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in
B.
how
C.
when
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A.
freezing at -70 degrees C
B.
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C.
autoclaving the liquid
D.
filtering the liquid
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【单选题】The most likely location for a liquid cargo fire to occur on a tanker would be ______.
A.
in the pumproom
B.
at the vent header
C.
at the main deck manifold
D.
the midships house
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【单选题】The most liquid asset of commercial banks is______.
A.
their holdings of government securities
B.
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