题目内容

How to Protect Yourself from Hackers Online

An increase in cyber-attacks (网络攻击) makes the Internet seem like a scary place these days. How can individuals protect or make it more difficult for hackers to access their information? Here are several tips that can help you protect against cyber-attacks:

1.

Hard passwords include upper and lower case letters, numbers and special characters. They should be at least eight characters in length. They should also not spell out words easy for hackers to find, like your pet's name or the name of a family member.

Change your password regularly

A very common mistake made by users is to create one hard password, but then never change it. Remembering a long list of complicated passwords can be difficult. But no password is unbreakable. Hackers are better able to hack multiple accounts if those accounts all have the same password. A password management service, like Dashlane or PasswordBox, can help you keep track of hard passwords. 2.

Clear your browser (浏览器) history

This goes for all the devices you use in a day – your home computer, your work computer, or your friend's iPad. Internet browsers like Firefox or Chrome keep track of where you've been and what you've done online. They keep records of every site you visited. 3. It is very easy for anyone who sees that information to steal a detailed record of your online activities.

Do not use free Wi-Fi

4. Often, a user does not need a password to connect to these wireless networks. These services might be useful, but they're also an easy way for hackers to access everything on your device.

Use anti-virus protection

There are many anti-virus services available for users. 5. Some anti-virus services are even free. They are a great way to have a professional help keeping users one step ahead of hackers.

A. Be careful while using thumb drive.

B. These services permit users to easily store and secure their passwords.

C. Make your password harder to hack.

D. They can offer many different types of computer protection.

E. An increasing number of public places now offer free wireless access to the Internet.

F. Information about what you sent from or saved on your computer can be kept for days or weeks.

G. Unless you really need it, it is best not to use it.

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36.A.andB.yetC.soD.for
37.A.opinionB.impressionC.informationD.intention
38.A.makeB.keepC.handleD.change
39.A.anythingB.somethingC.everythingD.nothing
40.A.questionsB.commentsC.explanationsD.remarks
41.A.holdB.followC.evaluateD.form
42.A.happyB.livelyC.reliableD.punctual
43.A.messageB.mottoC.sayingD.suggestion
44.A.againB.moreC.insteadD.later
45.A.stepsB.controlC.chargeD.risks
46.A.improvedB.actedC.lookedD.reflected
47.A.easilyB.carefullyC.confidentlyD.proudly
48.A.introducedB.recognizedC.identifiedD.considered
49.A.confirmedB.decidedC.realizedD.acknowledged
50.A.withB.belowC.ofD.by
51.A.developedB.discoveredC.tookD.fostered
52.A.acceptB.careC.judgeD.wonder
53.A.boredB.lazyC.sadD.afraid
54.A.trustB.patienceC.curiosityDo interest
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Scientists announced on Thursday, February 11, 2016, at a press conference in Washington, D. C that the more than half-century search for gravitational waves finally succeeded. They confirmed that they had detected gravitational waves caused by two black holes mixing together about 1. 3 billion years ago. It had been the first time the phenomenon was directly detected since it was predicted by Albert Einstein l00 years ago.

A China led space gravitational wave detection project is recruiting (招募) researchers from around the world, china news, com reported. The Tianqin project was started by Sun Yat-sen University in Zhuhhai. It centers on research of key technologies in space gravitational wave detection. To make the project more competitive,global talents in areas such as gravity theory,space gravity experiments and precision measurement are sought with an annual salary of up to 1 million yuan ($ 153.000). according to the report.

Gravitational waves are not easily detectable. When they reach the Earth, an extremely sensitive detector is needed, as other sources of noise can overwhelm the signal. Luo Jun. president of Sun Yat sen University said the detection of gravitational waves is a huge challenge and the project reflects the research competence of China.

The 15-billion yuan project aims to send wave-detection satellites into space in 15 to 20 years with construction of a research center and observatory to be started soon. Researchers will likely cooperate with other scientists from the European Space Agency’s LISA Project.

Gravitational waves are ripples (涟漪) in space time generated during the earliest moment of the universe, when the universe experienced a brief but disordered period of expansion. The detection of gravitational waves is believed to help scientists understand more mysteries of the universe.

1.What can we learn about gravitational waves?

A. They caused black holes to mix together.

B. They came out about half a century ago.

C. They wore proved true by Albert Einstein.

D. They have been discovered recently.

2.According to the passage, the Tianqin project is intended to .

A. develop technologies to detect space gravitational waves

B. attract talented researchers from across the globe

C. conduct various space gravity experiments

D. seek precision measurement in space

3.The underlined word “overwhelm” in the third paragraph probably means “ .”

A. absorb B. replace

C. remove D. cover

4.The main purpose of the passage is to .

A. explain the importance of the gravitational wave detection

B. present some new findings in space exploration

C. introduce a gravitational wave research project

D. encourage international cooperation in scientific research

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36.A.changeB.explainC.learnD.show
37.A.troubleB.doubtC.wishD.opportunity
38.A.tookB.droppedC.gotD.pulled
39.A.come outB.stand byC.go backD.turn up
40.A.pleaseB.greetC.helpD.praise
41.A.sittingB.walkingC.ridingD.running
42.A.discussionB.lessonC.reportD.conversation
43.A.jokeB.responseC.cryD.story
44.A.unchangeableB.unpreparedC.unforgettableD.unfinished
45.A.desperatelyB.frequentlyC.simplyD.widely
46.A.allowB.warnC.orderD.advise
47.A.laterB.straighterC.closerD.slower.

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