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问题 选择题

四位同学分别设计了用锌制取较纯净氢氧化锌的方案，下面用化学方程式体现的设计方案正确的是（　　）

A．2Zn+O2═2ZnO；ZnO+H2O═Zn（OH）2↓

B．Zn+稀H2SO4═ZnSO4+H2↑；ZnSO4+Ba（OH）2═Zn（OH）2↓+BaSO4↓

C．Zn+2HCl═ZnCl2+H2↑；ZnCl2+2KOH═Zn（OH）2↓+2KCl

D．Zn+Cl2═ZnCl2；ZnCl2+Mg（OH）2═Zn（OH）2↓+MgCl2

答案

A、金属氧化物除了氧化钠、氧化钾、氧化钙、氧化钡会与水生成碱，其他都不会与水反应生成碱，故A错误；

B、硫酸锌和氢氧化钡生成的硫酸钡和氢氧化锌都是沉淀，不易分离，故B错误；

C、活泼金属和酸会生成盐，盐和可溶性的碱反应会生成不溶性的碱，故C正确；

D、碱和盐反应时都必须是可溶的，但是氢氧化镁不可溶，故D错误．

故选C．

阅读理解

Gadgets make study fun
Now in a world piled high with smartphones, tablets (平板电脑)and e-readers, technology has entered the classroom in ways unimaginable． Taking classes can be fun too． All you have to do is swipe your fingers on your phone screen and download some apps (应用程序), which can make your study more fun and efficient ． Balancing study and play in a college setting has never been easy-and with the following few apps, it’ll be tough to tell the two apart．
Evernote
Use:note-taking
Can be used on: iPhone/iPad/iPod touch, Android , BlackBerry, Palm OS and Windows , Phone 7 price :free
If you take notes to stay organized，then Evernote is for you． The main thing about Evernote  is that all of your notes are automatically sent into the cloud-and then you can access them from any web-connected computer via the Evernote app or a web browser(浏览器)． Evernote also supports audio and photo notes-rather handy if you want to record your lecture or take photos of any projected notes． But, of course, ask for permission first．
Wikipanion
Use:research database
Can be used on: iPhone/iPad/iPod touch
Price :free ( Wikipanion Plus for $4．99,or 31．87 yuan )
Now , you don’t necessarily have to go to a library or anywhere with computer services to do research work for your paper anymore． You can get access to the research databases just on your smartphone or tablet．
Conquering Bilingual News Listening in 7 Days
Use: English learning application
Can be used on : iPhone/iPad/iPod touch
Price:For a limited time you can get the App for only $0．99—half price．Still learning English with a workbook? If so, you are behind the times．Get 21st Century Newspaper’s new iPhone App, “Conquering Bilingual News Listening in 7 Days”．When you download the App on your iPhone, you can listen to the hottest bilingual news selected from the newspaper’s official website (w．w．w．i2lst．cn)and read by native speakers, “Conquering Bilingual News Listening in 7 Days” has ranked No 1 on the Chinese education App list． For a limited time you can get the App for only $0．99—half price．
小题1:The purpose of this passage to                   ．
A．make your study more fun and efficient
B．introduce some apps used on gadgets
C．advertise high-tech teaching ways
D．promote new application programs
小题2:According to the passage, we can know that             ．
A．the three apps all support audio and photo forms．
B．college study is undoubtedly full of ease and fun
C．college students used to do research work in the library or via computers
D．students can record lectures and send them to the cloud without permission
小题3:Which of the following is true about the apps?
A．They can only be used on smartphones．
B．Evemote and Wikipanion Plus are free．
C．Evemote can merely be used on a computer．
D．They improve learning efficiency and pleasure．
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单项选择题

项．目融资的过程分为五个阶段：(1)投资决策分析；(2)融资结构分析；(3)融资决策分析；(4)项目融资的执行；(5)融资谈判，其正确的顺序应该是( )。

A．(1)(2)(3)(4)(5)
B．(1)(3)(2)(5)(4)
C．(1)(2)(5)(3)(4)
D．(1)(5)(2)(3)(4)
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