使用”归一化法”的定量简化公式X=100A/∑A的条件是样品的各组分结构、性质相近。

If you want to find out a piece of information about anything , the best place to search for it is Wikipedia（维基百科）. This online encyclopedia is written 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. In this way, people who know a lot about a certain subject can write about it even if they are not university professors.

What is more, Wikipedia includes articles written in about 235 languages. This fact makes it one of the few websites (网站)on the internet that are truly international. 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 been put on Wikipedia. A quarter of the articles are in English. Wikipedia is also a place where people can find the latest news.

However, Wikipedia has its own problems. There have been many complaints that some of the information on Wikipedia is not accurate（准确的）and some important subjects are not included. This has led to arguments between the writers of articles. The people running Wikipedia say that the accuracy of the information is improving 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?

小题1:Wikipedia is ___________. 

A．a computer game

B．an online magazine

C．a free university

D．a website encyclopedia小题2: People who write on Wikipedia__________.

A．know much about a certain subject

B．likes writing different stories

C．should be university professors

D．are usually famous scientists小题3:Wikipedia is truly international because_________.

A．everything is written in English

B．the articles are in about 235 language

C．there are over 10 million articles

D．each writer can write in Various languages小题4:Besides information about different subjects, people can also__________ on Wikipedia.

A．watch interesting movies

B．send e-mail to friends

C．read about the latest news

D．play exciting games

已知⊙O₁与⊙O₂相切，两圆半径分别为3和5，则圆心距O₁O₂的值是　   　．

临床上评价蛋白质营养状况的常用指标是（）

A.清蛋白

B.球蛋白

C.运铁蛋白

D.前清蛋白

E.视黄醇结合蛋白

赔偿请求人无正当理由拒不参加听证的，或者未经听证法官许可中途退出听证的，视为撤回赔偿申请。

选择涂料时，要考虑其使用环境和工件特点。( )