题目内容
The failed Skylab will come screaming home to the earth in disappointment sometime next month, but we don’t know where it will fall. That precise(准确的) information is beyond even the calculations of scientist and their computers.
The best they can tell us is that the space station, weighting 77 tons and as high as a 12-story building, will break into hundreds of pieces that will be scattered(散落) across a track 100 miles wide and 4,000miles long.
We are again exposed(暴露) to one of those unexpected adventures, or misadventures, of science that attract our attention from the boring routines of daily existence and encourages us to think a lot about man’s future.
What worries Richard Smith, the Skylab’s director, is the “big pieces” that will come through the atmosphere. Two lumps, weighing 2 tons each, and ten, weighing at least 1,000 pounds each, will come in at a speed of hundred of miles an hour, and if they crash on land they will dig holes up to 100 feet deep.
What worries us, with our lack of scientific knowledge and our quick imagination, is both the big and little pieces, although project officials say there is a very small chance that anyone will be injured by them.
That’s good to know, but it doesn’t remove the doubt of the millions who still remember the nuclear accident at Three Mile Island. That accident took place in 1979 in spite of what scientists had assured(向…保证) us as to the safety of the nuclear reactor(反应堆).
59. Where the Skylab will fall____.
A. is kept secret
B. will be announced soon
C. is foretold by scientists
D. can’t be foretold
60. The broken Skylab will come into view ____.
A. in two lumps---- one weighing 2 tons and the other weighing 10 tons
B. falling with the force of a 12-story building
C. as 12 bigger pieces and hundreds of smaller pieces
D. as an attractive scene to millions of people
61. The writer mentions Three Mile Island ____.
A. because he fears that a piece of the Skylab may strike a nuclear power plant
B. to express his doubt about the officials’ words
C. because he is afraid of nuclear power
D. because the nuclear reactor there and the Skylab were built by the same company
62. The writer expresses his ____.
A. interest in the failure of the Skylab
B. willingness to give his advice
C. worry about the misadventure of science
D. eagerness to see more new scientific discoveries
We’re all connected. You can send an e-mail message to a friend, and your friend can pass it on to one of his or her friends, and that friend can do the same, continuing the chain. Eventually, your message could reach just about anyone in the world, and it might take only five to seven e-mails for the message to get there.
Scientists recently tested that idea in a study involving 24,000 people. Participants had to try to get a message forwarded to one of 18 randomly(随意地,随机地) chosen people. Each participant started by sending one e-mail to someone they knew. Those who received it could then forward the e-mail once to someone they knew, and so on.
Subjects, who were randomly assigned by researchers from Columbia University in New York, lived in 13 countries. They included an Australian police officer, a Norwegian veterinarian, and a college professor.
Out of 24,000 chains, only 384 reached their goal. The rest petered out, usually because one of the recipients was either too busy to forward the message or thought it was junk mail.
The links that reached their goal made it in an average of 4.05 e-mails. Based on the lengths of the failed chains, the researchers figured out that two strangers could generally make contact in five to seven e-mails.
The most successful chains relied on casual acquaintances rather than close friends. That’s because your close friends know each other while your acquaintances tend to know people you don’t know. The phenomenon, known as the strength of weak ties, explains why people tend to get jobs through people they know casually but aren’t that close to.
So, start networking and instant messaging now. As they say in show business: It’s all about who you know.
【小题1】If you want to get into touch with a stranger in the world, how many e-mails might it take for the message to reach him/her?
A.5 to 7 | B.18 | C.13 | D.384 |
A.the 384 participants who lived in Australuia |
B.the Norwegian veterinarians and college porfessors |
C.the 24,000 people randomly assigned by reaearchers |
D.the 18 people randomly chosen from 13 countries |
A.die out | B.pass away | C.disappear | D.pick out |
A.Because close friends don’t talk with each other so much. |
B.Because casual acquaintances can help you know more people and make more friends. |
C.Because close friends don’t spend so much time gathering together. |
D.Because casual acquaintances are kinder and more willing to help others. |
A.Culture | B.Entertainment | C.Information and Technology | D.Health |