题目
A. But Komfeld said scientists will not know about the applicability of the drugs in humans until a similar study is done on humans. “What’s very encouraging is that these drugs were developed to treat humans, and they are well understood, because they’ve been used for a long time, ” he said。
B. Later the scientists discovered that two related anticonvulsant drugs also lengthened the lives of the worms-in the case of one drug, by almost 50 percent. “This was a big surprise to use, Komfeld said. ”“We didn’t think anticonvulsant drugs had any particular relationship to aging. That connection was completely unexpected. ”
C. Roundworms are a poor subject for experiments, because they are not like humans, even though their molecules are similar. For example, they have no bones, nor do they show emotions, making it difficult to know how exactly human subjects would react to these drugs in large quantities. However, using the worms allows experiments to be conducted quickly, because they do not live for long。
D. “Somehow the neural activity seems to regulate the aging of all of the body the skin, musculature, and reproductive tract, ” Kornfeld said. “Somehow the nervous system coordinates the progress of all these tissues, evidently, though the life stages. But we don’t know how it does that. ”
E. The discovery may also shed light on the little-understood aging process. Since the drugs act on the neuromuscular systems of both humans and worms, the findings hint at a link between neural activity and aging。
F. Unlike vertebrates, the worms are ideal subjects for the study of aging because of their short life spans, which last only a couple of weeks in a laboratory. The worm is well known in genetics, and the worm’s genome has been sequenced。
G. Use of this drug has been permitted by law since 1998 and wider use is now expected as a result of the studies. “We can clearly link this drug with human aging, but we still need to find proof, says Kornfeld optimistically. ”
第1题
For five years nobody needed to explain the word "united" to Republicans; it was their biggest strength. The president handed his agenda to Congress and the party leaders delivered the votes. They twisted the arms of small-government conservatives to pass education reforms and Medicare drug benefits. They held their ranks together even as the Iraq occupation was losing supports in 2004. And they picked up seats in two election cycles. But now that company has fallen apart. Members of Congress, tired of being taken for granted by a bossy White House, have lost faith in the president's political touch.
The stress is starting to show. Republicans are beginning to look and sound like their own caricature(漫画) of the Democrats: disorganized, off message and unsure of their identity. Fearful of defeat in November, GOP candidates are uncertain how to pull themselves together in the eight months left before the elections. The toughest question: whether to run, as they have in the past, as Bush Republicans, or to push the president out of their campaigns. "What I've tried to tell people is that a political storm is gathering, and if we don't do something to stop it, we'll be in the minority a year from now," says Rep. Ray LaHood from Illinois. "But some people still don't get it."
The president won't have an easy time persuading Republicans to stick with him. Second-term presidents often suffer a six-year slump, losing seats for their party at this point. Bush has actually been lucky in one respect. He held his party together longer than most two-term presidents. Johnson kept control for just eight months until he suffered defeat on the issue of home rule for the District of Columbia in 1965, when Democrats took him on—and won.
Some candidates are happy to stand beside Bush, as long as nobody actually sees them together. Locked in a tight race for re-election, Sen. Mike DeWine chose not to accompany Bush on one trip to his home state of Ohio last month. A week later he attended a private fund-raiser with the president in Cincinnati—out of sight of photographers and reporters.
While listening to Bush's pep talk, the Republicans______.
A.were inspired by the president to hold together
B.lost interest in the frequently heard content
C.disagreed with the president on his slogan
D.felt impatient with the slow speech
第2题
For five years nobody needed to explain the word "united" to Republicans; it was their biggest strength. The president handed his agenda to Congress and the party leaders delivered the votes. They twisted the arms of small-government conservatives to pass education reforms and Medicare drug benefits. They held their ranks together even as the Iraq occupation was losing supports in 2004. And they picked up seats in two election cycles. But now that company has fallen apart. Members of Congress, tired of being taken for granted by a bossy White House, have lost faith in the president's politican touch.
The stress is starting to show. Republicans are beginning to look and sound like their own caricature(漫画)of the Democrats: disorganized, off message and unsure of their identity. Fearful of defeat in November, GOP candidates are uncertain how to pull themselves together in the eight months left before the elections. The toughest question: whether to run, as they have in the past, as Bush Republicans, or to push the, president out of their campaigns. "What I've tried to tell people is that a political storm is gathering, and if we don't do something to stop it, we'll be in the minority a year from now," says Rep. Ray La Hood from Illinois. "But some people still don't get it."
The president won't have an easy time persuading Republicans to stick with him. Second-term presidents often suffer a six-year slump, losing seats for their party at this point. Bush has actually been lucky in one respect. He held his party together longer than most two-term presidents. Johnson kept control for just eight months until he suffered defeat on the issue of home rule for the District of Columbia in 1965, when Democrats took him on—and won.
Some candidates are happy to stand beside Bush, as long as nobody actually sees them together. Locked in a tight race for re-election, Sen. Mike DeWine chose not to accompany Bush on one trip to his home state of Ohio last month. A week later he attended a private fund-raiser with the president in Cincinnati—out of sight of photographers and reporters.
While listening to Bush's pep talk, the Republicans______.
A.were inspired by the president to hold together
B.lost interest in the frequently heard content
C.disagreed with the president on his slogan
D.felt impatient with the slow speech
第3题
America ’s National Institutes of Health says evidence suggests there are important periods of speech and language development in children.The ability to learn a language will be more difficult if these periods pass without early contact with a language.
The first signs of communication happen during the first few days of life, when a baby learns that crying will bring food and attention.Research shows that most children recognize the general sounds of their native language by six months of age.By that time, a baby usually begins to make speech-like sounds.These sounds become a kind of nonsense speech over time.
By the end of their first year, most children are able to say a few simple words, although they may not understand the meaning of the words.By 18 months of age, most children can say between eight and ten words.By two years of age, most children are able to make simple statements.By ages three, four and five, the number of words a child can understand quickly increases.It is at these ages that children begin to understand the rules of language.
41.Language and communication skills are best developed in an environment full of().
A、babies’ loud crying
B、sounds and sights
C、nonsense speech
D、food and attention
42.According to the second paragraph, evidence shows that for children there exist().
A、natural abilities to learn a language
B、difficult periods to learn a language
C、critical abilities to develop their language
D、critical periods to develop their language
43.A baby begins to learn what communication is when().
A、it realizes crying will bring food and attention
B、it first realizes nonsense speech over time
C、it first makes some recognizable sounds
D、it makes the sounds and speech repeatedly
44.When do babies usually begin to make speech-like sounds?
A、By the age of two.
B、By the age of one.
C、By the age of 6 months.
D、By the age of three.
45.According to the passage, which of the following language skills do children develop last?
A、Grammar.
B、Sounds.
C、Words.
D、Statements.
第4题
A.hewastired
B.hehasbeenworkinghardforthelasteightmonths
C.hewantstoworkonanewproject
D.heaskedquestionsinamoreappropriateway
第5题
A.$32.00
B.$33.30
C.$34.25
D.$35.00
第6题
A、Short-term ordinary loss
B、Short-term capital gain
C、Short-term capital loss
D、Long-term ordinary gain
E、Long-term capital gain
第7题
A.share
B.settle
C.live
D.accommodate
第8题
A.would aim at
B.would live at
C.would keep at
D.would stay at
第9题
A.abolish the eight-legged essay or stereotyped writing
B.wipe out the designed writing
C.throw over the eight legs
D.N/A
第10题
A.abolish the eight-legged essay or stereotyped writing
B.wipe out the designed writing
C.throw over the eight legs
D.N/A
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