题目

下列物质中，不能储存遗传信息的是 A．核酸B．脱氧核糖核酸C．核糖核酸D．核苷酸 答案：DComplete the following passage with the words in the box. Each can be used only once.（将下列单词填入空格。每空格限填一词，每词只能填一次）A. where B. In this way C. Yet D. improving E. What’s moreF. written G. international H. information J. problemsIf you want to find out a piece of information about anything, the best place to search for it is Wikipedia. This online encyclopedia is 【1】(write) by thousands of people around the world. Anyone can add or change the information if he or she finds it not correct or not well written. 【2】, people who know a lot about a certain subject can write about it even they are not university professors.【3】, Wikipedia includes articles written in about 253 languages. This fact makes it one of the few websites (网站) on the Internet that are truly 【4】 . It was started in 2001 by Larry Sanger and Jimmy Wales, as a free online English-language encyclopedia project. By April 2008, over 10 million articles had be put on Wikipedia. A quarter of the【5】 is English. Wikipedia is also a place【6】 people can find the latest news.However, Wikipedia has its own 【7】. There have been many complaints that some of the information on Wikipedia is not accurate and some important subjects are not included. This has led to arguments between the writers of the articles. The people running Wikipedia say that the accuracy of the information is【8】 and that it is one of the top 20 visited websites on the Internet.So, if you are looking for some information, why not try Wikipedia?