Choose the sentence which is NOT correct.well and healthy
A. George isn't looking very well these days, is he?
B. George isn't looking very healthy these days, is he?
C. Bright eyes are a sign of a healthy dog.
D. Bright eyes are a sign of a well dog.
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Choose the sentence which is NOT correct.ill and sick
A. I don't like hospitals. They're full of ill people.
B. I don't like hospitals. They're full of sick people.
C. Dave's not coming to work today. He's ill.
Dave's not coming to work today. He's sick.
关于磺胺类药物的构效关系的叙述，错误的是（ ）
A.基本结构为对氨基苯磺酰胺
B.芳伯氨基与磺酰胺基在苯环上必须互成对位
C.磺酰胺基N-双取代化合物多可使抑菌作用增强
D.磺酰胺基N-以杂环取代，抑菌作用明显增强
通过抑制细菌的二氢叶酸合成酶而起到抑菌作用的药物是（ ）
A.硫酸链霉素
B.甲氧苄啶
C.磺胺嘧啶
D.异烟肼
下列有关喹诺酮类抗菌药构效关系的描述不正确的是（）
A.N-1位若为脂肪烃基取代时，以乙基或与乙基体积相似的乙烯基、氟乙基抗菌活性最好
B.2位上引入取代基后活性增加
C.3位羧基和4位酮基是此类药物与DNA回旋酶结合产生药效必不可缺少的部分
D.5位取代基中以氨基取代最佳，其它基团活性均减少
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