题目

如图是某核苷酸与核苷酸长链的示意图，据图回答问题： （1） 已知图1的分子结构式右上角的含氮碱基为腺嘌呤（A）．请观察后回答下列问题：图1所示的核苷酸的名称是．该核苷酸是构成哪一种核酸的原料． （2） 图2为一条核苷酸长链的片段，据图回答：①图中所示1、2、3的名称分别是、、，4、5的名称分别是、．②此结构中与另一种核酸相比较，其特有的碱基中文名称是．Many parents want their children to be famous one day. But do children have the same 　 41　 . A new 　 42　 -Hi, Ke’ai is on at Beijing Children’s Art Theatre. It tells the story of a boy called Ke’ai. His parents would like him to become a painter or a 　 43　 one day. They teach him to 　 44　 and to play the violin, but Ke’ai doesn’t enjoy these activities. Then one day Ke’ai’s parents see Liu Xiang 　 45　 a gold medal at the Athens Olympic Games, and they want him to be a sportsman. “　 46　 do they want me to be someone else?” Ke’ai asks and says, “I only want to be 　 47　 ” The play shows us that it is good for parents to learn to 　 48　 their children. It helps parents to think about what kids want to do. Young audiences(观众) enjoy the story, and also the 　 49　 in the play. There are two songs in the play. One of them, “Ke’ai’s Song” is very 　 50　 to learn, so the audiences can sing the song on their way home after the play! (　 ) 41. A. jobs　　　　　　　　　　 B. dreams　　　　　 C. habits　　　　　　 D. hobbies (　 ) 42. A. song　　　　　　　　　 B. film　　　　　　　　 C. week　　　　　　　 D. opera (　 ) 43. A. writer　　　　　　　　 B. teacher　　　　　 C. sportsman　　　 D. musician (　 ) 44. A. paint　　　　　　　　　 B. write　　　　　　　 C. speak　　　　　　　 D. drive (　 ) 45. A. run　　　　　　　　　　 B. buy　　　　　　　　 C. win　　　　　　　　 D. race (　 ) 46. A. How　　　　　　　　　 B. Why　　　　　　　 C. When　　　　　　 D. Where (　 ) 47. A. myself　　　 　　 B. different　　　　 C. alone　　　　　　　 D. great (　 ) 48. A. encourage　　　　　 B. understand　　　 C. criticize　　　　　 D. inspire (　 ) 49. A. light　　　　　　　　　 B. clothes　　 C. skill　　　　　　　　 D. music (　 ) 50. A. easy　　　　　　　　　 B. difficult　　　　　 C. important　　　　 D. necessary