关于受体的叙述，不正确的是

A．可与特异性配体结合

B．药物与受体的复合物可产生生物效应

C．受体与配体结合时具有结构专一性

D．受体数目是有限的

E．拮抗剂与受体结合无饱和性

根据句子意思和首字母提示完成单词 (10分)

小题1:Don’t read in the sun. It does great h_________ to your eyes.

小题2:It is polite to wait in the l_________ when you are waiting to buy tickets.

小题3:My friends gave me a lot of g_______ on my birthday.

小题4:He feels l_________ from time to time because he misses his old friends.

小题5:I didn’t know it was you. You have c________ a lot.