单选

Passage One  Questions 21 to 25 are based on the following passage.

If you start each day desperately wishing for an extra hour in bed, the following is likely to leave you feeling even more bad-tempered. Scientists have identified a"sleepless elite"-a small group of people for whom staying in bed longer is a waste of time.Rather than being tired and bad-tempered losers, they are an energetic, outgoing and optimistic group who can happily and healthily get by on just four or five hours of sleep a night. and, they tend to be slim, able to hold down two jobs at the same time, and handle their extra-long days easily without needing coffee or catnaps(小睡).Working out how the gene(基因) cuts sleep without any obvious impact on health could help in the design of drugs that give us all a few extra hours in our day. The bad news is that while many of us get by on a few hours' sleep a night, just one to three people in 100 qualify to be part of the sleepless elite.The research team is now calling for members of the lucky group to come forward to allow their DNA to be studied. Harvard University researcher Dr. Christopher Jones said: "My long-term goal is to someday learn enough so we can control the sleep mechanism without damaging our health. Everybody can use more waking hours, even if you just watch movies."Many of those who have already volunteered share fascinating characteristics.They are cheerful, thinner than average, and seem to have a high tolerance for physical pain and psychological setbacks.Dr. Christopher Jones told the New York Times: "Typically, at the end of a long phone interview, they will admit they have been sending short text messages and surfing the Internet and doing word games at the same time, all on less than six hours of sleep."

21. According to the passage, the sleepless elite________.

  • A.perform less well than others
  • B.regard sleep as a waste of time
  • C.are energetic despite less sleep
  • D.are likely to make others angry
参考答案
您可能感兴趣的试题

The writer seems to think that fastwords________.

  • A.offer a decisive resolution
  • B.are as safe as passwords
  • C.offer a hopeful inspiration
  • D.are as simple as passwords

One unique advantage of fastwords is that they can be used________.

  • A.with more certainty
  • B.with greater speed
  • C.with more flexibility
  • D.with greater security

Passage Three  Questions 31 to 35 are based on the following passage.Are passwords out-of-date? It is starting to seem like it. Everybody hates them.These days a typical Internet user has dozens of online accounts. If you really want to be safe, you need to generate a different password for each one, and each password needs to be extremely complicated, with a mix of letters, symbols, and numbers. Who can keep all that stuff in their head?Most people do not bother. Some just create one password and use it everywhere. Others might have a few passwords—one for all their banking and financial stuff, one for their social networks, one for email accounts. Problem is that if one site gets hacked, the bad guys now have the password you use elsewhere. These attacks are happening so frequently these days that you might as well assume there is no way to keep a password secret.Computer scientists realize the system is broken, and they are looking for alternatives. But most attempts have not been very good. Fingerprint readers require special hardware, and many people find them scary and don’t want to use them. Smart cards can be lost or stolen. Scientists have tried all sorts of other approaches, but they end up back with passwords. They are the least worst in a series of bad choices.Markus Jakobsson, a researcher in computer science, has produced something he calls"fastwords." Instead of inventing a password, you join three simple words that come from a thought known only to you. If one day you were driving to work and ran over a frog that ended up flat, you might choose"frog work flat." You can enter the three words in any order, and the system still knows that you are you. If your mind goes totally blank, the fastwords system will tell thought and thus the three keywords.The fastwords system represents a step in the right direction, but it is not the promised land. Someone, somehow, needs to come up with something radically different-and radically better-than what we have today.

31.Today people find passwords________.

  • A.difficult to create
  • B.hard to remember
  • C.easy to figure out
  • D.apt to be replaced

We learn from paragraph 2 that many people use passwords________.

  • A.without due caution
  • B.in a rational manner
  • C.with frequent changes
  • D.in simple combinations

According to paragraph 3, a joke should support________.

  • A.the nature of an issue
  • B.the fame of a speaker
  • C.the subject of a speech
  • D.the taste of an audience
¥

订单号:

遇到问题请联系在线客服

订单号:

遇到问题请联系在线客服