题目内容
（请给出正确答案）
It can be learned from paragraph 4 that ______.
A．Straitford's prediction about Ukraine has proved tree
B．Straitford guarantees the truthfulness of its information
C．Straitford's business is characterized by unpredictability
D．Straitford is able to provide fairly reliable information
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更多“It can be learned from paragra…”相关的问题
A、Partnership.
B、Proprietorship.
C、Contractual company.
D、Mutual agency.
E、Voluntary organization.
One of London Zoo's recent advertisements caused me some irritation, so patently did it distort reality. Headlined "Without zoos you might as well tell these animals to get stuffed", it was bordered with illustrations of several endangered species and went on to extol the myth that without zoos like London Zoo these animals "will almost certainly disappear forever". With the zoo world's rather mediocre record on conservation, one might be forgiven for being slightly skeptical about such an advertisement.
Zoos were originally created as places of entertainment, and their suggested involvement with conservation didn't seriously arise until about 30 years ago, when the Zoological Society of London held the first formal international meeting on the subject. Eight years later, a series of world conferences took place, entitled "The Breeding of Endangered Species", and from this point onwards conservation became the zoo community's buzzword. Tiffs commitment has now been clearly defined in The World Zoo Conservation Strategy (WZCS, September 1993), which-although an important and welcome document-does seem to be based on an unrealistic optimism about the nature of the zoo industry.
The WZCS estimates that there are about 10,000 zoos in the world, of which around 1,000 represent a core of quality collections capable of participating in coordinated conservation programmes. This is probably the document's first failing, as I believe that 10,000 is a serious underestimate of the total number of places masquerading as zoological establishments. Of course it is difficult to get accurate data but, to put the issue into perspective, I have found that, in a year of working in Eastern Europe, I discover fresh zoos on almost a weekly basis.
The second flaw in the reasoning of the WZCS document is the naive faith it places in its 1,000 core zoos. One would assume that the caliber of these institutions would have been carefully examined, but it appears that the criterion for inclusion on this select list might merely be that the zoo is a member of a zoo federation or association. This might be a good starting point, working on the premise that members must meet certain standards, but again the facts don't support the theory. The greatly respected American Association of Zoological Parks and Aquariums (AAZPA) has had extremely dubious members, and in the UK the Federation of Zoological Gardens of Great Britain and Ireland has occasionally had members that have been roundly censured in the national press. These include Robin Hill Adventure Park on the Isle Wight, which many considered the most notorious collection of animals in the country. This establishment, which for years was protected by the Isle's local council (which viewed it as a tourist amenity), was finally closed down following a damning report by a veterinary inspector appointed under the terms of the Zoo Licensing Act 1981. As it was always a collection of dubious repute, one is obliged to reflect upon the standards that the Zoo Federation sets when granting membership. The situation is even worse in developing countries where little money is available for redevelopment and it is hard to see a way of incorporating collections into the overall scheme of the WZCS.
Even assuming that the WZCS's 1,000 core zoos are all of a high standard—complete with scientific staff and research facilities, trained and dedicated keepers, accommodation that permits normal or natural behaviour, and a policy of co-operating fully with one another—what might be the potential for conservation？ Colin Tudge, author of Last Animals at the Zoo (Oxford University Press, 1992), argues that "if the world's zoos worked together in co-operative breeding programmes, then even without further expansion they could save around 2,000 species of endangered land vertebrates". This seems an extremely optimistic proposition from a man who must be aware of the failing and weaknesses of
A．London Zoo's advertisements are dishonest.
B．Zoos made an insignificant contribution to conservation up until 30 years ago.
C．No one knew how the animals were being treated at Robin Hill Adventure Park.
D．The number of successful zoo conservation programmes is unsatisfactory.
B．On the playing field.
C．At the doctor's office.
D．In the auditorium.
A．demand 500,000 pounds for the Guilford Four
B．demand 500,000 pounds for each of the Guilford Four
C．demand 1,000,000 pounds for each of the Guilford Four
D．demand a re-examination of the Birmingham pub bombings
A．imaginative
B．a provider of hope for the future
C．a highly intellectual activity
D．ineffectual
Can electricity cause cancer？ In a society that literally runs on electric power, the very idea seems preposterous. But for more than a decade, a growing band of scientists and journalists has pointed to studies that seem to link exposure to electromagnetic fields with increased risk of leukemia and other malignancies. The implications are unsettling, to say the least, since everyone comes into contact with such fields, which are generated by everything electrical, from power lines and antennas to personal computers and micro-wave ovens. Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is legitimate or the worst kind of paranoia.
Now the alarmists have gained some qualified support from the U. S. Environmental Protection Agency. In the executive summary of a new scientific review, released in draft form. late last week, the EPA has put forward what amounts to the most serious government warning to date. The agency tentatively concludes that scientific evidence "suggests a causal link" between extremely low- frequency electromagnetic fields those having very longwave-lengths--and leukemia, lymphoma and brain cancer. While the report falls short of classifying ELF fields as probable carcinogens, it does identify the common 60-hertz magnetic field as "a possible, but not proven, cause of cancer in humans. "
The report is no reason to panic--or even to lose sleep. If there is a cancer risk, it is a small one. The evidence is still so controversial that the draft stirred a great deal of debate within the Bush Administration, and the EPA released it over strong objections from the Pentagon and the White House. But now no one can deny that the issue must be taken seriously and that much more research is needed.
At the heart of the debate is a simple and well-understood physical phenomenon: When an electric current passes through a wire, it generates an electromagnetic field that exerts forces on surrounding objects. For many years, scientists dismissed any suggestion that such forces might be harmful, primarily because they are so extraordinarily weak. The ELF magnetic field generated by a video terminal measures only a few milligauss, or about one-hundredth the strength of the earth's own magnetic field. The electric fields surrounding a power line can be as high as 10 kilovolts per meter, but the corresponding field induced in human cells will be only about 1 millivolt per meter. This is far less than the electric fields that the cells themselves generate.
How could such minuscule forces pose a health danger？ The consensus used to be that they could not, and for decades scientists concentrated on more powerful kinds of radiation, like X-rays, that pack sufficient wallop to knock electrons out of the molecules that make up the human body. Such "ionizing" radiations have been clearly linked to increased cancer risks and there are regulations to control emissions.
But epidemiological studies, which find statistical associations between sets of data, do not prove cause and effect. Though there is a body of laboratory work showing that exposure to ELF fields can have biological effects on animal tissues, a mechanism by which those effects could lead to cancerous growths has never been found.
The Pentagon is far from persuaded. In a blistering 33-page critique of the EPA report, Air Force scientists charge its authors with having "biased the entire document" toward proving a link. "Our reviewers are convinced that there is no suggestion that (electromagnetic fields) present in the environment induce or promote cancer," the Air Force concludes. "It is astonishing that the EPA would lend its imprimatur on this report. " Then Pentagon's concern is understandable. There is hardly a unit of the modern military that does not depend on the heavy use o
A．studies on the cause of cancer
B．controversial view-points in the cause of cancer
C．the relationship between electricity and cancer
D．different ideas about the effect of electricity on cancer
A．A truly great thinker makes no mistakes
B．Periods of intellectual achievement are periods of unorthodox reflection
C．The refutation of accepted ideas can best be provided by one's own teachers
D．excessive controversy prevents clear thinking
Directions: In this part of the test, you will hear several short statements. These statements will be spoken ONLY ONCE, and you will not find them written on the paper, so you must listen carefully. When you hear a statement, read the answer choices and decide which one is closest in meaning to the statement you have heard. Then write the letter of the answer you have chosen in the corresponding space in your ANSWER BOOKLET.
听力原文：Mrs Jones came to meet us at the airport. We thought she was the secretary, but she turned out to be the president of the company.
(21)
A．We were met by the head of the company at the airport.
B．We knew Mrs. Jones was the president of the company.
C．Mrs. Jones used to be the secretary of the company.
D．Mrs. Jones came to see us off at the airport.
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