题目

某人群中某常染色体显性遗传病的发病率为19%，一对夫妇中妻子患病，丈夫正常，他们所生的子女患该病的概率是(     ) A． B． C． D． 答案：AI saw Mr．Green take care of his flowers ________ I went past his house．A.each timeB.at each timeC.for each timeD.with each time