题目

“神舟”飞船舱体使用了我国自主研制的具有坚固、轻巧、易于加工等特点的铝锂合金板材料．选用这种材料与下列哪个物理属性无关A. 导电性 B. 密度C. 硬度 D. 延展性 答案：【答案】A【解析】铝锂合金板材坚固就说明了其硬度大；轻巧说明了其密度小；易于加工说明其延展性好；而坚固、轻巧、易于加工与导电性无关，故A正确BCD错误。阅读理解。Is it wrong to use someone else’s wireless(Wi-Fi) connection?Just recently,a man was arrested for doing just that.At that time,he was sitting in the street with a laptop(便携式电脑)and using an unsecured(无安全保护措施)wireless connection to surf the Net.What do you think about this topic?Listen to the following different views on it.For a start,if someone is using your Internet service or downloading,this will affect your speed of access or download limit.Also,it’s bad for Internet service providers.They will suffer in the long run because fewer people will pay for an Internet service if they know they can get it for free.And finally,just imagine this:what if the person who is stealing your Internet connection is involved in an illegal activity?I think the police are totally right to arrest these criminals.—by Sandra WilkinsBasically,if the person who paid for the service still has everything they paid for,what’s the problem?It’s just like using the light from streetlamps to read your book,or watching someone else’s firework display.It’s not stealing.Also,if you leave your wireless connection unsecured,then it is your own fault(过错)if someone else uses it.Just as you wouldn’t leave your front door unlocked,or your car door open,neither should you leave your wireless connection open.By leaving your wireless connection open,you are inviting people to use it.Securing your wireless connection is as easy as clicking a few settings on your router(路由器).And finally,haven’t the police got more important crimes to solve?They’re always saying how they haven’t got the manpower to solve real issues.But this is just ridiculous(荒谬的).—by James Hoarley1.Why was the man mentioned in the first paragraph arrested?A.For stealing someone’s laptop.B.For surfing the Net in the street.C.For using an Internet service without permission.D.For destroying others’ wireless connection.2.What does Sandra Wilkins think of people using others’ Internet service?A.He thinks it is necessary sometimes.B.He thinks it is unacceptable.C.He thinks it requires good computer skills.D.He thinks it is good for Internet service providers.3.In James Hoarley’s opinion, .A.Internet service should be improvedB.using others’ Internet service is not stealing at allC.it is hard to secure one’s wireless connectionD.people should leave their wireless connection open4.What would be the best title for the passage?A.Wireless worries B.Wireless connectionC.Internet service D.Internet users