题目内容
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Why is a new grounds-person needed？
Because the former grounds-person, Eddie Christiansen, has decided it's time to ______.
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更多“Why is a new grounds-person needed？Because the former grounds-person, Eddie Christiansen,”相关的问题
A．which to base on
B．on which to base
C．to base on which
D．which to be based on
On what grounds are certain managers seconded to HR departments？
A．It is believed that they will relate to potential recruits.
B．It is thought that they will benefit most from new developments.
C．It is assumed that they will be able to apply specialised knowledge.
D．It is expected that they will take advantage of new promotion opportunities.
A．which to base on
B．on which to base
C．to base on which
D．which to be based on
Fish resources are diminishing because______.
A．no new substitutes can be found in large quantities
B．they are not owned by any particular entity
C．improper methods of fishing have mined the fishing grounds
D．water pollution is extremely serious
One reason why a sheep, a less well-understood experimental subject than
the laboratory mouse, should have proved easier to clone may stem from
differences in the initial stages of the two species' embryonic development.
Line After reaching maturity in the ovary of the mother, the unfertilized eggs of all
(5) mammals accumulate a supply of proteins, and the means of producing fresh
protein. In this way, the mammalian egg brings with it a larder for the embryo
to make use of until its own genes activate and supply this requirement
themselves. The sheep embryo disposes of its store properly and need not
depend on its own genes until the sixteen-cell stage, four cell divisions
(10) successive to fertilization, while in contrast, the mouse embryo commences this
process more precociously, becoming reliant on the activity of its own genes
after just the first division when the fertilized egg becomes two cells.
Therefore, a foreign nucleus introduced into a sheep egg exploits a respite in its
host's biological development, allowing it to adapt to its new role before
(15) assuming genetic control.
Concomitantly, a nucleus introduced into a mouse egg must acclimatize
quickly for its genes to be able to direct embryonic development within a single
cell division, so perhaps there is insufficient time for the extensive re-
programming of compulsory gene activity. The human embryo is thought to rely
(20) on its own genes after three cellular divisions, which might or might not
provide time enough for a foreign nucleus to acclimate. However, were
scientists to comprehend the nature of the indispensable re-programming then
there is every likelihood that both mice and humans could be cloned.
Despite the long-standing availability of this technology, there has until
(25) recently been little interest in it. Some people suffering from infertility as a
result of rare hereditary diseases could produce offspring, but cloned individuals
may be at risk given scientists' limited knowledge of the long term effects of
allowing an "old" adult cell nucleus to commence life again in an egg. The
nucleus of a skin cell could have accumulated a multitude of genetic mistakes of
(30) no consequence to its role in the skin, but the same cell could prove deleterious
in other tissues, or immensely increase the probability of the affliction with
cancer. The threat to general human health posed by cloning, as opposed to the
individual, is difficult to determine, but the risks are almost certainly lower
than those encountered in the effective inbreeding of consanguine marriages,
(35) and thus there are no scientific grounds per se for banning cloning. Like other
practices inconsequential to the physical well being of humanity, but generally
deemed undesirable on moral or social grounds, the prohibition of human
cloning will ultimately rest with only a simple pragmatic decision.
In this passage, the author is primarily concerned with
A．advancing an argument against human cloning based on evidence from cloning experiments performed on lower life forms
B．measuring the technical and ethical limitations of the embryonic cloning process in mammals
C．refuting arguments against human cloning through the use of hard scientific evidence
D．illuminating the critical ethical distinctions in process between human cloning and sheep cloning
E．describing how the ethical issues in the quest for human cloning have given rise to new models of embryonic development
One reason why a sheep, a less well-understood experimental subject than
the laboratory mouse, should have proved easier to clone may stem from
differences in the initial stages of the two species' embryonic development.
After reaching maturity in the ovary of the mother, the unfertilized eggs of all
(5) mammals accumulate a supply of proteins, and the means of producing fresh
protein. In this way, the mammalian egg brings with it a larder for the embryo
to make use of until its own genes activate and supply this requirement
themselves. The sheep embryo disposes of its store properly and need not
depend on its own genes until the sixteen-cell stage, four cell divisions
(10) successive to fertilization, while in contrast, the mouse embryo commences this
process more precociously, becoming reliant on the activity of its own genes
after just the first division when the fertilized egg becomes two cells.
Therefore, a foreign nucleus introduced into a sheep egg exploits a respite in its
host's biological development, allowing it to adapt to its new role before
(15) assuming genetic control.
Concomitantly, a nucleus introduced into a mouse egg must acclimatize
quickly for its genes to be able to direct embryonic development within a single
cell division, so perhaps there is insufficient time for the extensive re-
programming of compulsory gene activity. The human embryo is thought to rely
(20) on its own genes after three cellular divisions, which might or might not
provide time enough for a foreign nucleus to acclimate. However, were
scientists to comprehend the nature of the indispensable re-programming then
there is every likelihood that both mice and humans could be cloned.
Despite the long-standing availability of this technology, there has until
(25) recently been little interest in it. Some people suffering from infertility as a
result of rare hereditary diseases could produce offspring, but cloned individuals
may be at risk given scientists' limited knowledge of the long term effects of
allowing an "old" adult cell nucleus to commence life again in an egg. The
nucleus of a skin cell could have accumulated a multitude of genetic mistakes of
(30) no consequence to its role in the skin, but the same cell could prove deleterious
in other tissues, or immensely increase the probability of the affliction with
cancer. The threat to general human health posed by cloning, as opposed to the
individual, is difficult to determine, but the risks are almost certainly lower
than those encountered in the effective inbreeding of consanguine marriages,
(35) and thus there are no scientific grounds per se for banning cloning. Like other
practices inconsequential to the physical well being of humanity, but generally
deemed undesirable on moral or social grounds, the prohibition of human
cloning will ultimately rest with only a simple pragmatic decision.
In this passage, the author is primarily concerned with
A．advancing an argument against human cloning based on evidence from cloning experiments performed on lower life forms
B．measuring the technical and ethical limitations of the embryonic cloning process in mammals
C．refuting arguments against human cloning through the use of hard scientific evidence
D．illuminating the critical ethical distinctions in process between human cloning and sheep cloning
E．describing how the ethical issues in the quest for human cloning have given rise to new models of embryonic development
Text 3
Every other week, new studies appear that either criticize or praise the roasted bean. Are there grounds for concern under the fragrant foam？
Some people believe that coffee bean can lower the incidence of some diseases. First, the disease is diabetes. A study of 14,000 people in Finland which is the world's greatest per-capita consumer of coffee found that women who drank three to four cups a day cut their risk of developing diabetes by 29 percent. For men, it was 27 percent.' Researchers aren't sure why, but suspect that the antioxidants in coffee help deliver insulin to the body's tissues. Second, it can lower cancer. In Japan, a study of 90,000 people revealed those who drank coffee every day for ten years were half as likely to get liver cancer. Meanwhile, German scientists have identified an active compound in coffee that boosts enzymes thought to prevent colon cancer. Finally, it can also lower Parkinson's disease. Researchers in Hawaii monitored the health of more than 8,000 Japanese-American men for 30 years and discovered that those who drank a cup of coffee a day had less than half the incidence of Parkinson's disease. A possible clue as to why: caffeine promotes the release of dopamine, a substance involved with movement and usually consumed in ParHnson's sufferers.
On the contrary, there's hot debate on whether drinking coffee is a cardiac risk. A Greek study of more than 3,000 people found coffee drinkers has higher levels of bad substances in their blood than non-drinkers. But Harvard researchers looking at the health of coffee drinkers over 20 years could not localize any extra coronary problems. Nevertheless, a study of 2,028 Costa Ricans found those with a gene variant that processes caffeine four times slower than average, and who also drank two to three cups of coffee a day, upped their heart-attack risk by 36 percent. As this group me-tabolises caffeine slower, it remains in the body for longer - possibly pushing up blood pressure.
For most of us, the humble cup of coffee is simply a harmless and enjoyable way to kick -start the day or give us an excuse for some time out. No more, no less. However, it is important to remember that different people exhibit different tolerance levels to caffeine - it is, after all, a drug.
51. What is mainly discussed in the text？
[A] roast bean can cure disease.
[B] roast bean is a good medicine.
[ C] more and more people want to drink coffee.
[D] whether the roast bean is good or bad is also a question.
Some people believe that coffee bean can lower the incidence of some diseases. First, the disease is diabetes. A study of 14, 000 people in Finland which is the world's greatest per-capita consumer of coffee found that women who drank three to four cups a day cut their risk of developing diabetes by 29 percent. For men, it was 27 percent. Researchers aren't sure why, but suspect that the antioxidants in coffee help deliver insulin to the body's tissues. Second, it can lower cancer. In Japan, a study of 90, 000 people revealed those who drank coffee every day for ten years were half as likely to get liver cancer. Meanwhile, German scientists have identified an active compound in coffee that boosts enzymes thought to prevent colon cancer. Finally, it can also lower Parkinson's disease. Researchers in Hawaii monitored the health of more than 8, 000 Japanese-American men for 30 years and discovered that those who drank a cup of coffee a day had less than half the incidence of Parkinson's disease. A possible clue as to why: caffeine promotes the release of dopamine, a substance involved with movement and usually consumed in Parkinson's sufferers.
On the contrary, there's hot debate on whether drinking coffee is a cardiac risk. A Greek study of more than 3, 000 people found coffee drinkers has higher levels of bad substances in their blood than non-drinkers. But Harvard researchers looking at the health of coffee drinkers over 20 years could not localize any extra coronary problems. Nevertheless, a study of 2, 028 Costa Ricans found those with a gene variant that processes caffeine four times slower than average, and who also drank two to three cups of coffee a day, upped their heart-attack risk by 36 percent. As this group metabolises caffeine slower, it remains in the body for longer — possibly pushing up blood pressure.
For most of us, the humble cup of coffee is simply a harmless and enjoyable way to kick — start the day or give us an excuse for some time out. No more, no less. However, it is important to remember that different people exhibit different tolerance levels to caffeine — it is, after all, a drug.
What is mainly discussed in the text？
A．roast bean can cure disease.
B．roast bean is a good medicine.
C．more and more people want to drink coffee.
D．whether the roast bean is good or bad is also a question.
听力原文： The school officials state that the new engineering building on the school grounds is finally coming to its completion. The engineering students who have attended classes in the Hailey Building on the south side of the campus will be able to enjoy their new classrooms in the Thompson Building beginning next month. We are extremely sorry for the delay and inconvenience. However, we believe that once the project ends, the engineering students will truly believe that it was worth their wait. The new building will have large classrooms along with the most up-to-date equipment, central heating, and air-conditioning. And lastly, in regard to the available parking spaces on the campus, an additional parking structure in the form. of a tower is planned to be erected to alleviate any overcrowding. The start of this construction will begin later this month and is expected to take roughly six months.
When is the new engineer building expected to open to students？
A．This week.
B．At the end of this week.
C．Next month.
D．In six months.
In 2004, only about 524,000 salmon are thought to have returned to the spawning grounds, barely more than a quarter the number who made it four years earlier. High water temperatures may have killed many. The House of Commons also lambasted the federal Department of Fisheries and Oceans (DFO) for poor scientific data, and for failing to enforce catch levels. Four similar reports since 1992 have called for the department's reform. In vain: its senior officials are "in denial" about its failings, said the committee.
Mr. Williams' report added a more shocking twist. He concluded that illegal fishing on the Fraser river is "rampant and out of control", with “no-go” zones where fisheries officers are told not to confront Indian poachers for fear of violence. The judge complained that the DFO withheld a report by one of its investigators which detailed extensive poaching and sale of salmon by members of the Cheam First Nation, some of whom were armed.
Some First Nations claim an unrestricted right to fish and sell their catch. Canada's constitution acknowledges the aboriginal right to fish for food and for social and ceremonial needs, but not a general commercial right. On the Fraser, however, the DFO has granted Indians a special commercial fishery. To some Indians, even that is not enough.
Both reports called for more funds for the DFO, to improve data collection and enforcement. They also recommended returning to a single legal regime for commercial fishing applying to all Canadians.
On April 14th, Geoff Regan, the federal fisheries minister, responded to two previous reports from a year ago. One, from a First Nations group, suggested giving natives a rising share of the catch. The other proposed a new quota system for fishing licences, and the conclusion of long-standing talks on treaties, including fishing rights, with First Nations. Mr. Regan said his department would spend this year consulting "stakeholders" (natives, commercial and sport fishermen). It will also launch pilot projects aimed at improving conservation, enforcement and First Nations' access to fisheries.
The "explosive conflict" in Para 1 refers to
A．Salmon's return to spawn and its survival.
B．The fisheries committee of Canada's House of Commons and Bryan Williams
C．The struggle between sockeye salmon and human beings.
D．The collision between salmon's survival and human fishery.
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