题目

人类染色体异常会造成流产、痴呆等疾病。人类第7号和第9号染色体之间可以发生易位，如图甲所示，但易位后细胞内基因结构和种类未发生变化。后代如果出现9号染色体“部分三体”（细胞中出现9号染色体的某一片段有三份），则表现为痴呆病患者；如果出现9号染色体“部分单体”（细胞中出现9 号染色体的部分缺失），后代早期流产。图乙为由于发生第7号和第9号染色体之间易位而导致的流产、痴呆病系谱图，已知Ⅱ-1染色体正常，Ⅰ-2、Ⅱ-2为图Michael Jackson’s sudden death really astonished(震惊) his fans, but soon they are glad to find another younger “King of Pop” has appeared.Wang Yiming, who is known as Xiao Bao, has already been popular across the world with his wonderful dance moves. He once appeared on U.S. television show “Ellen” and performed successfully at the World Expo 2010.     About seven years ago, Xiao Bao was born prematurely（早产）, which made his mother really worried. He was so weak. What could he do? Doctors suggested that moving his body to music would help make him strong, but soon his parents were surprised by how quickly Xiao Bao fell in love with music! “When he was young, we just started playing music to him and he started moving around like this. But we didn’t think that he had such a strong feeling for music. When he was just several months old, we would let him listen to music and he would stop crying and calm down at once,” the proud mother once said.So far, Xiao Bao has learned the moonwalk and other Jackson’s moves well. His fans are crazy about his wonderful shows. He has drawn more people’s attention. He is fast becoming internationally popular.There are lots of problems waiting for him, but Xiao Bao will never give up. He is serious about his dancing career(事业). Where there is a will, there is a way. We are sure that Xiao Bao’s dream will come true one day1.Xiao Bao has been famous for ______.A.his young ageB.his dance movesC.his television showsD.his strong body2.Why did doctors advise Xiao Bao to dance?A.Because they knew Xiao Bao’s feeling for musicB.Because Xiao Bao’s parents wanted them to do soC.Because Xiao Bao likes Michael’s dancing a lotD.Because they thought dancing would be good for his health3.How did Xiao Bao’s parents feel when they first saw his reaction(反应) to music?A.SurprisedB.HappyC.ProudD.Worried4.What can we learn from the passage?A.People have paid little attention to Xiao BaoB.Xiao Bao’s fans are not satisfied with his movesC.Xiao Bao works seriously and never gives up dancingD.His parents worry about their son’s crazy love for music5.What’s the best title for the passage?A.A Boy’s Dancing CareerB.A Younger “King of Pop”C.Michael Jackson’s MovesD.Wang Yiming’s Hobby