题目内容

能够产生重氮化一偶合反应的药物是

A. 麻黄碱
B. 肾上腺素
C. 异丙基肾上腺素
D. 克仑特罗

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对肾上腺素能受体激动剂构效关系叙述正确的是

A. 苯环与侧链氨基相隔2个碳原子时作用较强
B. 苯环上引入羟基时作用强度增加
C. R-构型光学异构体活性较
D. 碳原子上引入甲基毒性降低
E. 侧链氨基上的烃基增大,B受体效应逐渐增强

It is hard to imagine how we could spend a day without ____(electronic) today.

It is____(typically) of Jack to wear formal clothing on such an occasion.

Professor Wang is very____(productivity) as a linguist.