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【单选题】
—_____? —They're our soccer balls. [ ]A.
What's that
B.
What are those
C.
Who are they
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举一反三
【简答题】extrinsic protein
【简答题】用三种形式绘制企业培训项目的工作分解结构图。
【单选题】Selective precipitation of a protein from a crude extract is MOST effective by which molecule?
A.
ammonium sulfate
B.
urea
C.
sodium dodecyl sulfate
D.
EDTA (ethylenediaminetetraacetic acid)
E.
All of the answers are correct.
【单选题】Crude protein contents were measured in crab fed with diets ( ) methionine.
A.
complementing
B.
supplementing
C.
supplemented
D.
complemented
【单选题】关于中药制剂的稳定性叙述错误的是（ ）。
A.
许多酯类药物常受H+或OH-催化水解
B.
介电常数低的溶剂将降低药物分解速度
C.
加入表面活性剂可使稳定性增加
D.
微量金属离子对自氧化反应有抗氧化作用
E.
药物的吸湿，取决其临界相对湿度(CRH)的大小
【单选题】The isoelectric point of the protein is( )
A.
The pH of the solution when the positive and negative charges on the protein are equal
B.
The pH of the solution when the pH of the protein solution is equal to 7
C.
The pH of the solution when the protein molecule is a facultative ion
D.
The pH of the solution when the protein molecule is in a positive ion state
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