题目

在医学高速发展和人们生活水平大幅度提高的今天，人类遗传病的发病率和死亡率却呈相对增高的趋势，以下关于遗传病的概念和类型叙述，正确的是（ ）A.遗传病就是指控制生物性状的基因发生突变而引起的疾病B.多基因遗传病的患者后代发病率低于单基因遗传病患者后代的发病率C.没有致病基因的个体不可能患有遗传病D.出生时就患的病为遗传病听对话和问题，选择适当的选项。(     )1. A. Nothing special.?           B. Jiaozi.??           C. Anything delicious.? (     )2. A. Christmas.?           B. The Spring Festival.?           C. Mother's Day.? (     )3. A. He often goes out for a trip.??            B. He often visits his friends and relatives.?            C. Both A and B. (     )4. A. Li Ping is a foreigner.?            B. The woman is Chinese.?            C. The woman isn't Chinese. (     ) 5. A. The woman.?            B. Li Ping.?            C. The man.?