一对表现型正常的夫妇生了一个血友病A患儿，他们女儿患血友病A的概率是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24532' and id < 2108154 and id<>'2108154' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24532' and id > 2108154 and id<>'2108154' order by id asc limit 5