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【单选题】
二种药物与血浆蛋白竞争性结合 ,可使A.
结合率高的药物活性增强
B.
结合率低的药物活性增强
C.
结合率低的药物活性减弱
D.
结合率高的药物作用维持时间短
E.
对二药活性无影响
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【单选题】Mary is ill today. If she _____， she ____ absent from school.
A.
were not ill ， wouldn't be
B.
had been ill ， wouldn't have been
C.
had been ill ， should have been
D.
hadn't been ill ， could be
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