题目

任务型阅读 As we all know, friendship is of greatimportance in our daily life. A friend can give us help and share our difficultiesand happiness. But how to make friends is still difficult for some of us. Be friendly to others. You should try to make a stranger feel at homewherever he happens to be. Think more of others than of yourself and neverjudge a person by his appearance and clothes. Be reliable. If you and your friends agreeto meet somewhere, don't be late. If you're not going to make it on time ormake it at all, call them as soon as you realize it. Be someone that people know t以下是一种伴性遗传病的家系图，该病与一对等位基因有关。下列叙述正确的是（   ）  A．该病是显性遗传病B．致病基因只位于X染色体上C．III—8与正常女性结婚，子女都不患该病D．该病在男性人群中的发病率高于女性人群