酸碱指示剂的变色范围与其电离平衡常数有关。

如图实验装置，既可用于制取气体，又可用于验证物质性质．

（1）甲同学利用I、Ⅱ装置进行的实验是______（填序号）．

①锌与稀硫酸反应制取氢气

②过氧化氢与二氧化锰混合制取氧气

③大理石与稀盐酸反应制取二氧化碳

（2）乙同学利用I、Ⅱ装置进行过氧化钠（Na₂O₂）固体与水反应制取氧气并测定其体积的实验，该反应的另一产物为氢氧化钠，反应的化学方程式为______，为达到该实验目的，如何改进装置______．

（3）丙同学利用I、Ⅲ装置进行“硫燃烧现象及酸雨危害模拟实验”．实验操作步骤：①连接仪器，装好药品；②将玻璃棒下端在酒精灯上烧红，迅速伸入广口瓶中点燃硫粉；③向锥形瓶中注入双氧水；④硫粉完全燃烧后，用注射器向广口瓶中喷水．

实验过程中观察到的现象是______．

实验结束时，用注射器向装置Ⅲ中注入NaOH溶液以吸收剩余的SO₂气体．

A “blogger” is a person who writes on an Internet computer web site called a “blog”．The word “blog” is a short way of saying web log, or personal web site．Anyone can start a blog, and they can write about anything they like．

There are millions of blogs on the Internet today．They provide news, information and ideas to many people who read them．They contain links to other web sites．And they provide a place for people to write their ideas and react to the ideas of others．

A research company called Perseus has studied more than 3,000 web logs．It says that blogs are most popular with teenage girls．They use them to let their friends know what is happening in their life．The study also says that more than 100,000 bloggers stopped taking part in the activity after a year．

However, some people develop serious blogs to present political and other ideas．For example, the Republican and Democratic parties in the southern state of Kentucky recently started their own blogs．And American companies are beginning to use blogs to advertise their products．

At the same time, some long-standing blogs have ended．Last week, blogging leader Dave Winer closed his free blog service, weblogs．com．He says the site became too costly to continue．He started the blog four years ago, and thousands of people had written on it．

One blog that is still going strong is called Rebecca’s Pocket．It involves much useful information for readers．Rebecca Blood created the web site in 1999．She wrote about the history of blogs on the site．That article led to a book called “The Weblog Handbook”．It has been translated into four languages so far．

Ms Blood says Rebecca’s Pocket gets about 30,000 visitors a month．She writes about anything and everything----politics, culture and movies．She recently provided medical advice．And she wrote about how to prevent people from stealing money from online bank accounts．

小题1:The text is written mainly to _____

A．introduce an Internet computer web site called “blog”

B．introduce a way of reading on blogs．

C．tell readers how to write blogs

D．tell readers about blogs小题2:From the text we can learn that blogs cover almost everything except ____．

A．different ideas   B．medical advice    C．account codes D advertisements．

小题3:According to this passage, which of the following is NOT true?

A．A lot of bloggers no longer write or read blogs

B．Politicians don’t use blogs at all

C．Those who like to use blogs are mostly teenage girls

D．Dave Winer closed his “weblogs．com” because of money shortage小题4:The reason why Rebecca’s Pocket is still going strong is that_____

A．it provides plenty of useful information and advice

B．it was created by a woman

C．it is about the history of books

D．it has editions in at least four different languages

通过对建设项目及水源选择进行环境卫生监督属（）

A.经常性卫生监督

B.预防性卫生监督

C.环境调查

D.环境监测

E.环境监督

中国外交部发言人姜瑜表示，钓鱼岛及其附属岛屿自古就是中国领土，要求日本巡逻船不得在钓鱼岛附近海域进行所谓 * * 活动，更不得采取任何危及中国渔船和人员安全的行为。外交部发言人的表态表明（）。

①政府必须维护我国人民的根本利益

②我国以经济和科技为基础的综合国力增强

③日本推行强权政治

④主权是一个国家的生命和灵魂

A.①②

B.③④

C.①③

D.①④

韶山8型电力机车基础制动装置的制动率是（）。