某二叉树中有n个度为2的结点，则该二叉树中的叶子结点数为( )。A．n+1 B．n- 发布时间：2017-06-08 23:33 │ 来源：www.tikuol.com 题型：单项选择题 问题： 某二叉树中有n个度为2的结点，则该二叉树中的叶子结点数为( )。A．n+1B．n-1C．2nD．n/2
题型：单项选择题 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．EvernoteUse:note-takingCan 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．WikipanionUse:research databaseCan be used on: iPhone/iPad/iPod touchPrice :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 DaysUse: English learning applicationCan be used on : iPhone/iPad/iPod touchPrice: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 efficientB．introduce some apps used on gadgetsC．advertise high-tech teaching waysD．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 funC．college students used to do research work in the library or via computersD．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． 查看答案
题型：单项选择题 老李不幸在车祸中受伤。因有意外伤害险，老李出院后获得了保险公司赔偿，他便放弃了对肇事者请求赔偿的权利，那么( )。A．老李的行为无效B．老李的行为有效C．老李的行为部分有效D．老李的行为延期生效 查看答案