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They were, by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some 15 billion light years from earth. 1) But even more important, it was the farthest that scientists had been able to look into the past, for what they were seeing were the patterns and structures that existed 15 billion years ago.That was just about the moment that the universe was born. What the researchers found was at once both amazing and expected; the US National Aeronautics and Space Administration’s Cosmic Background Explorer satellite—Cobe—had discovered landmark evidence that the universe did in fact begin with the primeval explosion that has become known as the Big Bang (the theory that the universe originated in an explosion from a single mass of energy). 2) The existence of the giant clouds was virtually required for the Big Bang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.According the theory, the universe burst into being as a submicroscopic, unimaginable dense knot of pure energy that flew outward in all directions, emitting radiation as it went, condensing into particles and then into atoms of gas. Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans. Cobe is designed to see just the biggest structures, but astronomers would like to see much smaller hot spots as well, the seeds of local objects like clusters and superclusters of galaxies. They shouldn’t have long to wait. 3) Astrophysicists working with ground based detectors at the South Pole and balloon borne instruments are closing in on such structures, and may report their findings soon. 4) If the small hot spots look as expected, that will be a triumph for yet another scientific idea, a refinement of the Big Bang called the inflationary universe theory.Inflation says that very early on, the universe expanded in size by more than a trillion fold in much less than a second, propelled by a sort of antigravity. 5) Odd though it sounds, cosmic inflation is a scientifically plausible consequence of some respected ideas in elementary particle physics, and many astrophysicists have been convinced for the better part of a decade that it is true.
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更多 “问答题They were, by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some 15 billion light years from earth. 1) But even more important, it was the farthest that scientists had been able to look into the past, for what they were seeing were the patterns and structures that existed 15 billion years ago.That was just about the moment that the universe was born. What the researchers found was at once both amazing and expected; the US National Aeronautics and Space Administration’s Cosmic Background Explorer satellite—Cobe—had discovered landmark evidence that the universe did in fact begin with the primeval explosion that has become known as the Big Bang (the theory that the universe originated in an explosion from a single mass of energy). 2) The existence of the giant clouds was virtually required for the Big Bang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.According the theory, the universe burst into being as a submicroscopic, unimaginable dense knot of pure energy that flew outward in all directions, emitting radiation as it went, condensing into particles and then into atoms of gas. Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans. Cobe is designed to see just the biggest structures, but astronomers would like to see much smaller hot spots as well, the seeds of local objects like clusters and superclusters of galaxies. They shouldn’t have long to wait. 3) Astrophysicists working with ground based detectors at the South Pole and balloon borne instruments are closing in on such structures, and may report their findings soon. 4) If the small hot spots look as expected, that will be a triumph for yet another scientific idea, a refinement of the Big Bang called the inflationary universe theory.Inflation says that very early on, the universe expanded in size by more than a trillion fold in much less than a second, propelled by a sort of antigravity. 5) Odd though it sounds, cosmic inflation is a scientifically plausible consequence of some respected ideas in elementary particle physics, and many astrophysicists have been convinced for the better part of a decade that it is true.” 相关考题
考题
单选题What lessons can be learned from the past in this decade?A
Private issue has always been associated with data collection.B
Attacks on freedom are new.C
The accumulation of data encourages oppression.D
Privacy has been a neglected issue.
考题
单选题According to the passage, many important persons in public life and the big corporations______.A
were educated in Oxford and CambridgeB
were educated in Princeton and YaleC
graduated from Harvard and PrincetonD
graduated either from Harvard or from Yale
考题
问答题Early in the seventeenth century English settlers brought the English language within the borders of the present United States. In using the language in this new environment they began immediately and necessarily to modify it. As time passed more colonists came and the settled areas along the Atlantic coast became larger. Modifications in the English brought from the homeland multiplied. For a long time neither the users of this changed form of English nor those who remained in England paid particular attention to what was happening to the language here. Those in England who first noticed the changes viewed the matter with easy tolerance. But in time, because of circumstances unnecessary to detail here, this attitude changed to one of alarm and criticism. Those in this country of sufficient education and culture to know or care about this linguistic matter were divided in their thinking. Some were disposed to agree with their overseas critics and to counsel stricter adherence to orthodox use of the language; others were of a decidedly contrary view.
考题
单选题Which of the following is true according to the text?A
People with surnames beginning with N to Z are often ill-treated.B
VIPs in the Western world gain a great deal from alphabetism.C
The campaign to eliminate alphabetism still has a long way to go.D
Putting things alphabetically may lead to unintentional bias.
考题
单选题Which of the following is NOT stated in the passage?A
Comedians on TV are believed to have done a lot in making people more tolerant of racial and religious differences.B
To make up differences, humor is a most acceptable as well as a most effective means.C
People often turn to humorous ways when meeting with difficult situation because of its effectiveness.D
Only by adopting the means of humor can one succeed in some jobs.
考题
单选题The word “cinch” (Line 3, Para. 1 ) most probably means______.A
a very easy thing.B
a very complex thing.C
a great challenge.D
an extremely hard problem.
考题
单选题According to the passage, the man who wants to learn ______.A
will learn from his own exampleB
will do so from his diaryC
will use his diary as a source of calmD
will treat himself subjectively
考题
问答题[A] Trends [B] Models [C] Self-care [D] Decisions [E] Conflicts [F] Self-preservation [G] Spell it out Keith Hewson, a 29-year-old airline pilot, hadn’t planned to live with his in-laws after he got married. But he quickly realized that sharing a three-bedroom Houston townhouse with his wife’s parents, who offered to let them live there rent free, would allow him and his wife, Katy, to pay off their student loans and credit card debt and save for a house of their own. Hewson is part of a generation that is benefiting from the generosity of its parents, who are approaching retirement or already retired. Almost 4 in 10 adults age 60 or older give money to their adult children, while only about 12 percent get financial help from their kids, according to the Pew Research Center. 1. ____________________ High housing prices, the rising cost of higher education, and the relative affluence of the older generation are among the factors driving the tendency, which experts expect to become more pronounced as more baby boomers enter their golden years over the next two decades. Indeed, the annual cost of a public four-year college has more than doubled over the past 20 years, and housing prices over the same period have more than tripled on average. That has provided more wealth to boomer homeowners while at the same time making it harder for their kids to buy first homes. “It’s just more and more important for kids to get this kind of help,” Coontz says, noting that families unable to give cash often provide non-monetary help, such as offering to baby-sit their grandchildren or allowing adult children to move in with them. 2. ____________________ But depending on retired parents can also create family tension. “It’s embarrassing,” says Sharon Davey, a single mother of two young daughters in Merrimack, N. H. Since her divorce about four years ago, she has been relying on her mother’s help. “It makes me feel like a little kid, and I’m 46 years old ... Obviously, I’m extremely thankful and appreciate that she helped me when I don’t know what I would have done, but it’s a hard pill to swallow.” Eileen Gallo, a psychotherapist and coauthor of The Financially Intelligent Parent, recommends that parents ask themselves if giving money makes an adult child more or less independent. Her husband and coauthor, Jon Gallo, warns that dependence can breed tension: “If you continue to have to be rescued by your parents, you start to resent your parents.” 3. ____________________ When considering making loans or gifts, experts warn that parents should first protect themselves from financial distress. An Ameriprise Financial survey found that many baby boomers didn’t realize how much the help they were providing was cutting into their own retirement savings. About 30 percent of baby boomers said the money they gave to their adult children negatively affected their own retirement savings, but most were unaware of the impact it was having. 4. ____________________ If parents do decide to give money, the Gallos recommend discussing the details in advance, including whether the money comes with any strings attached. For example, if money is earmarked for a car, can it be any type of car? If the money is a loan, when does it need to be repaid, and at what interest rate? New companies, such as Virgin Money, allow family members as well as friends to lend each other money through a more formal arrangement, which includes automatic monthly payments and deposits. 5. ____________________ Parents may want to consider the example they’re setting. Frank Furstenberg, professor of sociology at the University of Pennsylvania, says young adults today may watch their parents providing so much support for so long—and be wary of becoming parents themselves. And that, of course, would be very bad news for boomers who aspire to become grandparents.（此文选自U.S. News World Report 2007年刊）
考题
问答题Our brains respond to our shadows as if they were another part of the body, according to a scientific study. When we see something about to come into contact with the edge of our shadow, brain activity suggests it is as if they are about to touch us instead. Scientists tested volunteers’ reaction speeds and accuracy while distracting them with flashing lights. They found that similar errors happened when lights flashed either next to a hand’s shadow or the hand itself. The brain develops an internal “map” which helps it define exactly where the body is—which helps it navigate around the world outside.The results, by researchers at Royal Holloway College in London, suggest that the body’s shadow may form part of that map. The tests used shadows cast onto a white table in front of a seated volunteer. The subject was asked to distinguish between touches on the thumb and forefinger of the hand, and the number of errors—and the overall reaction time—were recorded. When flashing lights placed near the hand are activated, the number of errors rises and reaction time slows as the brain is forced to deal with the distraction.
考题
单选题From the first three paragraphs, we learn that ______.A
doctors used to increase drug dosages to control their patients’ painB
it is still illegal for doctors to help the dying end their livesC
the Supreme Court strongly opposes physician-assisted suicideD
patients have no constitutional right to commit suicide
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问答题Напишите сочинение на тему 《Современная молодёжь》.
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