The author compares rain forests to coral reefs because ______.
A. they are approximately the same size
B. they share many similar features
C. most of their inhabitants require water
D. both have many different forms of life
用以表示药物解离度的参数
A. pKa
B. lgP
C. 酸性药物
D. 碱性药物
E. pH
与受体可以有偶极形式结合的基团
A. 酰胺基
B. 巯基
C. 磺酸基
D. 羟基
E. 烷基
增加亲脂性，一般可使药物作用时间延长的基团是
A. 卤素
B. 烷基
C. 羟基
D. 巯基
E. 硫醚
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