试题详情
阅读理解-阅读单选 较易0.85 引用3 组卷195

Your DNS cache (域名存储器) stores the locations (IP addresses) of web servers that contain web pages which you have recently viewed. If the location of the web server changes before the entry in your DNS cache updates, you can no longer access the site.

If you encounter a large number of HTML 404 error codes, you may need to clear your DNS cache. After you clear your DNS cache, your computer will query(询问) nameservers (域名服务器) for the new DNS information. The following methods allow you to remove old and inaccurate DNSinformation that may result in 404 errors.

Windows 7

To clear your DNS cache if you use Windows 7,perform the following steps:

Click Start.

Enter cmd in the Start menu search text box.

Right-click Command Prompt and select Run as Administrator.

Run the following command:

Ipconfig/flushdns

If the command succeeds, the system returns the following message: Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows® 8

To clear your DNS cache if you use Windows 8, perform the following steps:

On your keyboard press Win+X to open the WinX Menu.

Right-click Command Prompt and select Run as Administrator.

Run the following command:

Ipconfig/flushdns

If the command succeeds, the system returns the following message:Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows XP, 2000, or Vista®

To clear your DNS cache if you use Windows XP, 2000, or Vista®, perform the following steps:

Click Start.

On the Start menu, click Run.

If you do not see the Run command in Vista, enter run in the Search bar.

Run the following command:

ipconfig/flushdns

If the command succeeds, the system returns the following message: Successfully flushed the DNS Resolver Cache.

MacOS® 10.10.4 and above

To clear your DNS cache if you use MacOS X version 10.10.4 or above, perform the following steps:

Click Applications.

Click Utilities.

Click Terminal.

Run the following command:

sudo killall-HUP mDNSResponde

If the command succeeds, the system does not return any output(输出信息).

Warning:

To run this command, you must know the computer‘s administrator account password.

【小题1】If the command succeeds, all the following systems return a massage except .
A.Windows® 8B.Windows 7
C.Windows XP, 2000, or Vista®D.MacOS® 10.10.4 and above
【小题2】What is the main purpose of writing the passage?
A.To introduce something about several systems on computer.
B.To explain how to solve some problem in several systems on computer.
C.To explain how to access some sites in several computer systems.
D.To explain how to install DNS cache in several computer systems.
【小题3】Which of the following is true about DNS cache according to the text?
A.DNS cache stores the IP addresses of web servers.
B.DNS cache needs to be cleared, if you meet a large number of error codes.
C.DNS information may result in 404 errors.
D.Unless the entry in your DNS cache updates, the location of the web server won‘t change.
19-20高一上·湖北荆州·阶段练习
知识点:信息技术 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!
类题推荐

Four Apps You Need While in NYC

It’s okay to get some help when exploring NYC. These free apps can help you determine the fastest and safest routes there.

Embark NYC

It got you to work, popular restaurants and house parties. Embark NYC provides details on train delays, accidents, and has scheduled updates to ensure you can stay ahead of the masses. The app also features an easy-to-read subway map so that you know where you’re headed next.

Devices: Android, iPhone, iPad, iPod

Citymapper

Citymapper is perfect for people internationally traveling in NYC. Available in Spanish, French, German, and Italian, the app allows you to customize your schedule to best suit your needs. The app works hand in hand with those who regularly use the car service. Citymapper will also tell you the nearest bus stations and departure times. It also provides weather up-dates, delays, and optimizes (使最优化) search results to ensure you are given the fastest routes available in your area.

Devices: Android, iPhone

MTA Subway Time

Straight from the source, this app offers quick access to all the trains. The app will help find stations to best suite your travels needs and can help find alternative travel routes in case of emergency. It also features updates on the Staten Island Railroad.

Devices: Android, iPhone

Cab Sense NYC

Cab Sense NYC updates street corners and areas where cabs are present. You don’t have to stand in the rain any longer, and simply use the app by shaking your phone to tell drivers in your area you’re looking for a cab.

Devices: iPhone

【小题1】What is special about Embark NYC?
A.It provides details on trains.
B.It can be downloaded for free.
C.It helps people travel in NYC.
D.It can be used on more devices.
【小题2】Who will show special interest in Citymapper?
A.A local train drivers.
B.A computer programmer.
C.A Spanish businesssman in NYC.
D.A Frenchman travelling by bus.
【小题3】Which app offers you information about taxis in NYC?
A.Embark NYC.B.Citymapper.
C.MTA Subway Time.D.Cab Sense NYC.

Today almost everyone knows computers and the Internet. If I ask you “What is the most important in your life?” Maybe you will say “Computers and the Internet.”

The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer has said, “People can’t live without computers today.”

The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, write letters, do shopping, play games or make friends.

Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages, and even sex. They are so interested in making the “unreal friends” that they can’t put their heart into study. Many of them can’t catch up with others on many subjects because of that.

We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet.

【小题1】Which of the following is TRUE?
A.Few students like going into the Internet.
B.Students use the Internet to make “unreal friends”.
C.These “unreal friends” often meet each other.
D.Students know the friends on the Internet very well.
【小题2】The Internet cannot be used for_____.
A.studyingB.shoppingC.thinkingD.playing
【小题3】The underlined part in Para. 4 can be replaced by “_____”.
A.concentrate onB.reflect onC.recover fromD.graduate from
【小题4】What does the writer think of the Internet?
A.It is wonderful.B.It can make students study harder.
C.It is not good for students.D.It is helpful, but we can’t do everything on it.

If you have been wanting to learn Spanish, or perhaps you once took a Spanish course in college and want to improve your skills, but are too busy to take more lessons, you might have thought about using an app.

Pimsleur

The Pimsleur app offers an audio-based method for learning foreign languages. Its program includes core lessons, role-play speaking challenges, practice activities and games, as well as cultural and historical facts. The Pimsleur system states that you’ll learn the language in just 30 minutes a day without boring grammar lessons or mindless repetition.

Babbel

Babbel is a popular app that is based on conversational skills. Its program is based on real-life conversations about useful topics, and it uses speech recognition technology to help you improve your pronunciation. The app provides you with grammar tips and lots of review activities, and it also tracks your learning progress so that you can see how you are improving.

Duolingo

Its program is made to be game-like to make it fun. It claims to adapt to your own learning style so that you can have lessons that can meet your specific needs. It also offers rewards to keep you motivated (有积极性的). Duolingo includes reading, writing, speaking, listening and conversation practice. People enjoy this method because they feel like they are playing a game instead of working.

Beelinguapp

It is a clean, user-friendly app that focuses on learning a language by reading. It places Spanish and another language side by side using different stories, so you can build awareness of how the language works and listen to a native speaker read your favorite stories. You can choose different text genres (类型) and create flashcards to keep track of everything you learn.

【小题1】What do Pimsleur and Duolingo have in common?
A.They both focus on grammar learning.
B.They both use relaxing ways to interest users.
C.They both reward users for their learning progress.
D.They both provide one-on-one instruction for beginners.
【小题2】What benefit can users get from Babbel?
A.Developing their interest in science.
B.Making friends with native speakers.
C.Getting better grades in Spanish exams.
D.Mastering expressions in daily communication.
【小题3】Which app provides users with reading materials in two languages?
A.Beelinguapp.B.Pimsleur.C.Duolingo.D.Babbel.

组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网