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【简答题】
一定温度下测得A、B、S三组元物系两液相的平衡数据如本题附表所示。表中的数据均为质量分数。欲将1000kg含溶质A30％(质量分数，下同)的原料液萃取分离。试求： (1)最小与最大萃取剂S的用量； (2)萃取后欲得到36％A的E相组成，求得到相应的R相的组成，并计算操作条件下的选择性系数β； (3)将E相和R相中的溶剂完全脱除后的萃取液和萃余液的组成和流量； (4)若组分B、S可视为完全不互溶，且操作条件下以质量比表示相组成的分配系数K=2．5，要求原料液中的溶质A有90％进入萃取相，则每千克原溶剂B需要消耗多少千克的萃取剂S? 溶质A的总萃取率；
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核
B.
账
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上作废标记
D.
账
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正确
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【单选题】______ is the effect that is caused by a drug and is different from the drug's intended effect.
A.
Side effect
B.
Drug allergy
C.
Drug interaction
D.
Nourishment
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【简答题】天气与气候的区别
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【单选题】As to the issue of drug approval, ______.
A.
to judge whether a drug is safe enough should rely on objective measures
B.
drug companies usually study for years to prove the safety and effectiveness of a drug
C.
drug companies prefer surrogate endpoints in the process of drug approval because F.D.A.encourages them to do so
D.
drug companies rely heavily on surrogated endpoints because this way of measurement takes less time and money
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【单选题】If your client is experiencing unpredictable abnormal symptoms including opposite drug action, it shows that the drug can cause ______.
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drug tolerance
B.
idiosyncratic effect
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D.
drug interaction
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A.
正确
B.
错误
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【单选题】The MIC value of drug A is 2 mg/ml, and the MIC value of drug B is 125 mg/ml, thus ( ).
A.
the antibacterial activity of drug A is weaker than drug B
B.
the antibacterial activity of drug A is stronger than drug B
C.
the antibacterial spectrum of drug A is broader than drug B
D.
the antibacterial spectrum of drug A is narrower than drug B
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查看完整题目与答案
【单选题】As to the issue of drug approval, ______.
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drug companies rely heavily on surrogated endpoints because this way of measurement takes less time and money
查看完整题目与答案
【单选题】If your client is experiencing unpredictable abnormal symptoms including opposite drug action, it shows that the drug can cause ______.
A.
drug tolerance
B.
idiosyncratic effect
C.
drug allergy
D.
drug interaction
查看完整题目与答案
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A.
正确
B.
错误
查看完整题目与答案
【单选题】The MIC value of drug A is 2 mg/ml, and the MIC value of drug B is 125 mg/ml, thus ( ).
A.
the antibacterial activity of drug A is weaker than drug B
B.
the antibacterial activity of drug A is stronger than drug B
C.
the antibacterial spectrum of drug A is broader than drug B
D.
the antibacterial spectrum of drug A is narrower than drug B
查看完整题目与答案