题目

缺词填空 根据短文内容和所给首字母提示，在下文空格处填入适当的词使短文完整。（每空一词） Once there was a man c  1 _Terry Fox, who was good at sport. But u  2 , he had bone cancer(癌症) in 1977 and he had to have one of his legs cut. At that time he was only 18 years old. As he knew he would leave the world soon, he decided to do something useful to help others, especially the people who had cancer. He d  3  to run across the country with a man-made leg to raise money for cancer research. He began his Marathon of Hope Run on April 12, 198013．孟德尔用豌豆进行两对相对性状的杂交实验不必考虑的是（　　）A．亲本的双方都必须是纯合子B．两对相对性状各自要有显隐性关系C．对母本去雄，授以父本花粉D．显性亲本作父本，隐性亲本作母本