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)，则图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， 4、5的名称分别是、。此结构中与另一种核酸相比较，其特有的碱基中文名称是。 （3） 通常由条图示的核苷酸长链构成一个DNA分子，真核细胞中其主要分布在。阅读理解。     Sport is very popular in England. In other words lots of English people like the idea of sport. A lot watch sport on TV. But the number who take part in (参加) sport is quite small. On the whole English people prefer to be fat rather than thin. 　　     The most popular sport in England is football. Football is played on Saturday afternoon in most towns and the supporters (球迷) of a certain team will travel from one end of the country to the other to see their team play. There are four divisions (级别) of the football league. Not surprisingly the best teams are in the first division. But the best supporters are often in the fourth division. You have to be a good supporter to watch the fourth division football! 　　     Many other sports are also played in England, such as golf, in which you try to knock a ball into a hole; basketball, in which you try to got a ball through a net (篮筐); tennis, in which you try to hit a ball so that your opponent (对手) can not hit it. As you see, if the ball had not been invented, there would have been no sport. 　　     Actually (其实), that is not quite true. Athletics (田径) isn't played with a ball; nor horseracing (赛马). Perhaps that is why they are not so popular as football! 1. ________ is the most popular sport in England. 　A. Basketball B. Football C. Golf D. Tennis 2. You have to be a good supporter to watch ______division football. 　A. the first B. the second C. the third D. the fourth3.Why do many English people not take part in sport? A. They would like to be fat. B. They like watching sport on TV. C. They are too busy. D. They prefer to be thin. 4.Why are English people interested in sport? 　A. They have their football team. 　B. The sport games are played on Saturday afternoon. 　C. They like the idea of sport. D. They like the famous players.