高二英语阅读理解强化训练数学笑话附解析Day 104
Passage 1
Opening a suspect suitca to arch its contents usually means breaking the lock. This is why America's transportation Security Administration (TSA) worked with luggage makers to create special types of luggage locks. The locks can' be opened by a t of master keys held by airport curity.
That might em an elegant solution but a Washington Post story about the TSA last year included photos of a complete t of the master keys. Commonly available software can turn any picture of an object into a digital design. Now a group of amateur lock openers have proudly posted online that they had ud 3D printers to make perfect copies of the master keys, and published the files so that others could do the same.
From a technological point of view, this is nothing special: the dangers of publishing pictures of keys are well known. But the scale (规模) of this particular ca is astonishing: a
傻怎么读大学英语作文大全round 300 million luggage locks have been sold with the TSA's stamp. The damage to curity is probably slight. Luggage locks are known to be weak: they rve more to protect privacy than posssions. But the ca does expo the danger in official thinking about curity, particularly at a time when the FBI is advocating having back-doors — in effect cret master keys — built in to commercial encryption (加密) products. The reason is that spies and criminals can shelter behind encrypted communications. Making big Internet companies build hidden weakness into the software that, runs messaging and e-mail rvices would give the authorities a chance to catch up.
The ca of TSA's master keys expos the problem in this argument. The ability to decrypt (解密) everyone's messages would indeed be uful for agencies like the FBI. But wrong-doers would like the master keys too, and make every effort to steal them. We have now en what happened to the TSA's master keys. Who will still believe that any electronic master keys will be stored safely?
1. The author introduces the topic of the text in Paragraph 1 by ________ .
郑州室内设计培训A. showing a ca
B. raising a question
C. making a comment
D. predicting an event
2. What does he Washington Post story about the TSA suggest?________
A. It is not very difficult to make copies of the master keys.
宵禁令是什么意思
B. Amateur lock openers are actually as skillful as experts.
C. Specific software can turn photos of objects into real ones.
D. Any digital design can be copied with the help of 3D printing.
3. Why does the FBI favour the u of cret master keys?________
A. Secret master keys are safer than ordinary ones.
canteen怎么读
B. Secret master keys can help the FBI spy on crimes.
C. The FBI wants to control tho big Internet companies. 黑洞吞噬的东西去哪了
D. The FBI can check whether messaging software has weakness.
4. What is the real concern of the author?________
A. The intelligence of wrong-doers.
B. The skill in decrypting messages.
C. The existence of TSA's master keys.
D. The risk in official thinking about curity. 让它去吧
Passage 2
Teens don't understand the big fuss (小题大做). As the first generation are to grow up in a wired world, they hardly know a time when computers weren't around, and they eagerly
catch the chance to spend hours online, chatting with friends. So what?
英语作文 中秋节
But rearchers nationwide are increasingly worried that teens are becoming isolated, less skillful at person-to-person relationships, and perhaps numb to the cheating that is so much a part of the e-mail world. "And a teen's n of lf and values may be changed in a world where personal connections can be limitless, " said Shetty Turkle. abn
Another rearcher, Robert Kraut, said he's worried about the "opportunity costs" of so much online time for youths. He found that teens who ud computers, even just a few hours a week, showed incread signs of loneliness and social isolation. "Chatting online may be better than watching television, but it's wor than hanging out with real friends, " he said.
Today's teens, however, don't e anything strange in the fact that the computer takes up a central place in their social lives. "School is busy and full of pressure. There's almost no time to just hang out, " said Parker Rice, 17, "Talking online is just to catch time. "
Teens say they feel good about what they say online or taking the time to think about a reply. Some teens admit that asking someone for a date, or breaking up, can be easier in the form of a message, though they don't want to do so. But they insist there's no harm.
1. The rearchers argue that.
A. teens develop a different n of values
B. nothing is wrong with teens' chatting online
C. teens can manage their social connections
D. spending hours online does much good to teens
2. The text mainly deals with.
A. teens' pleasant online experience
B. teens' computer skills and schoolwork
C. the effects of the computer world on teens
D. different opinions on teens' chatting online
3. Which of the following is TRUE?
A. Teens are more skillful at person-to-person relationships.
B. Teens showed decreasing signs of loneliness and social isolation.
