题目内容
（请给出正确答案）
A.of the drop
B.the drop' s
C.drop of
D.drops the
答案
B、the drop' s
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更多“It is widely believed that the…”相关的问题
Although the fact that today viruses are known to 【S1】______
cause cancer in animals and in certain plants, that exists 【S2】______
a great reluctance to accept viruses as being of importance
in human cancer.
Basic biological phenomena generally do not
differ strikingly as one goes from one species through 【S3】______
another. It should be recognize that caner is a biological 【S4】______
problem and not a problem that is unique for man.
Cancer originates when a normal cell suddenly becomes
a cancer cell which multiplys widely and without 【S5】______
apparent restraint. Cancer may originate in many different
kind of cell, but the cancer cell usually continues 【S6】______
to carry certain traits of the cell of origin. The
transformation of a normal cell into a cancer cell may have
less than one kind of cause, but there is good reason to 【S7】______
consider the relationships that exist between viruses
and cancer.
Since there is no evidence which human cancer, as 【S8】______
generally experience, is infectious, many persons
believe that because viruses are infectious agents they
cannot possibly be of importance in human cancer.
However, viruses can mutate and examples are known
in which a virus that never kills its host can mutate to
form. a new strain of virus that always kills its host. It
does not seem unreasonable assume that an innocuous 【S9】______
latent virus might mutate to form. a strain that causes
cancer. Certainly the experiment evidence now available 【S10】______
is consistent with the idea that viruses as we know
them today, could be the causative agents of most, if not
all cancer, including cancer in man.
【S1】
The growing interest of【C4】______in the safety and nutritional quality of the typical North American diet is a welcome development.【C5】______，much of this interest has been sparked by sweeping claims that the food supply is unsafe or inadequate in meeting nutritional needs.Although most of these【C6】______are not supported by scientific evidence，the preponderance(优势)of written material【C7】______such claims makes it difficult for the general public to separate fact from【C8】______．As a result，claims that eating a diet【C9】______entirely of organically grown foods prevents or【C10】______disease or provides other benefits to health have become widely【C11】______and form. the basis for folklore．Almost daily the public is【C12】______by claims for“no-aging”diets，new vitamins and other【C13】______foods．There are numerous unsubstantiated reports that【C14】______vitamins are superior to synthetic ones，that fertilized eggs are nutritionally【C15】______than unfertilized eggs and the【C16】______．
One thing that most organically grown food products seem to have in common is that they【C17】______more than conventionally grown foods．But in many cases consumers are【C18】______if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods．So there is real cause for concern if consumers particularly those with【C19】______incomes，distrust the【C20】______food supply and buy only expensive organic foods instead．
【C1】
A．conventional
B．traditional
C．formal
D．normal
At present, signatures are widely used to identify credit card holders, but it takes an expert to detect a good forgery. Sometimes even a human expert is fooled, and there is no reason to believe that a computer could do any better.
Photographs are also sometimes used for identification. But, people find it inconvenient to stop by a credit-card company and to be photographed. Companies might lose business if they made the pictures under absolute requirement. Also, photographs are less useful these days, when people frequently change their appearance by changing the way they wear their hair. Finally, computer programs for analyzing photographs are still highly experimental.
Cash-drawing systems often use two identification numbers: One is recorded on a magnetic stripe on the identification cards, and the other is given to the CRS holder. When the user inserts his card into the cash-drawing terminal, he keys in the identification number he has been given. The computer checks to see that the number recorded on the card and the other keyed in by the user refer to the same person.
For a long time, fingerprints have provided a method of positive identification. But they suffer from two problems. One is that there is no simple system for comparing fingerprints electronically, the other is that because most people associate being fingerprinted with being arrested; they almost surely would resist being fingerprinted for routine identification.
Voiceprints have been suggested. With these, the user has only to speak a few words for the computer to analyze his voice. There are no psychological problems here. And technically it's easier to take and analyze voiceprints than fingerprints. However, it has yet to be proved that the computer cannot be fooled by imitation. Also, the voice is subjected to the noise and distortion of a telephone line.
Even lipprints have been suggested. But it's doubtful that kissing computers will ever catch on.
Which of the following is NOT mentioned as one of the identification system requirements？
A．Convenience.
B．Reliability.
C．Low costs.
D．Acceptability.
Those who believe that drama evolved our of ritual also argue that those rites contained the seed of theater because music, dance, masks, and costumes were almost always used. Furthermore, a suitable site had to be provided for performances, and when the entire community did not participate, a clear division, was usually made between the "acting area" and the "auditorium". In addition, there were per formers, and since considerable importance was attached to avoiding mistakes in the enactment of rites, religious leaders usually assumed that task. Wearing masks and costumes, they often impersonated other people, animals, or supernatural beings, and mined the desired effect—success in hunt or battle, the coming rain, the revival of the Sun —as an actor might. Eventually such dramatic representations were separated from religious activities.
Another theory traces the theater's origin from the human interest in storytelling. According to this view, tales(about the hunt, war, or other feats)are gradually elaborated at first through the use of impersonation, action, and dialogue by a narrator and then through the assumption of each of the roles by a different person. A closely related theory traces theater to those dances that are primarily rhythmical and gymnastic or that are imitations of animal movements and sounds.
What does the passage mainly discuss？
A．The origins of theater
B．The role of ritual in modern dance
C．The improtance of storytelling
D．The variety of early religious activities
The growing interest of consumers in the safety and nutritional quality of the typical North American diet is a welcome development. However, much of this interest has been sparked by sweeping claims that the food supply is unsafe or inadequate in meeting nutritional needs. Although most of these claims are not supported by scientific evidence, the greater number of written material advancing such claims make it difficult for the general public to sep arate fact from fiction. As a result, claims that eating a diet consisting entirely of organically grown foods prevents or cures disease or provides other benefits to health have become widely publicized and form. the basis for folklore.
Almost daily the public is surrounded by claims for "no-aging" diets, new vitamins, and other wonder foods. There are numerous unsubstantiated reports that natural vitamins are superior to synthetic ones, that crops grown with organic fertilizers are nutritionally superior to chose with chemical fertilizers, that untreated grains are better than fumigated grains, and the like.
One thing that most organically grown food products seem to have in common is that they cost more than conventionally grown foods. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern ff consumers, particularly those with limited incomes, distrust the regular food supply and buy only expensive organic foods instead.
The author implies that there is cause for concern if consumers with limit ed incomes buy organic foods instead of conventionally grown foods be cause ______ .
A．organic goods can be more expensive but are often no better than conventionally grown foods
B．many organic foods are actually less nutritious than similar conventionally grown foods
C．conventionally grown foods are more readily available than organic foods
D．too many farmers will stop using conventional methods to grow food crops
The conditions we live in are different from those of any prior civilization, and they give less support to men's claims of superiority than perhaps any other historical era. When these conditions weaken that support, men can rely only on previous tradition, or their attempts to socialize their children, to shore up their faltering advantages. Such rhetoric is not likely to be successful against the new objective conditions and the claims of aggrieved women. Thus, men are correct when they feel they are losing some of their privileges, even if many continue to laugh at the women's liberation movement.
The new conditions can be listed concretely, but I shall also give you a theoretical formulation of the process. Concretely, because of the increased use of various mechanical gadgets and devices, fewer tasks require much strength. As to those that still require strength, most men cannot do them either. Women can now do more household tasks that men once felt only they could do, and still more tasks are done by repair specialists called in to do them. With the development of modern warfare, there are few, if any, important combat activities that only men can do. Women are much better educated than before.
With each passing year, psychological and sociological research reduces the areas in which men are reported to excel over women and discloses far more overlap in talents, so that even when males still seem to have an advantage, it is but a slight one. It is also becoming more widely understood that the posts in government and business are not best filled by the stereotypical aggressive male but by people, male or female, who are sensitive to others' needs, adept in obtaining cooperation, and skilled in social relations. Finally, in one sphere after another, the number of women who try. to achieve rises, and so does the number who succeed.
It can be inferred that' the main source of men's resistance to women's liberation is the feeling that ______.
A．women are now better educated
B．women can now hold executive positions
C．men are no longer indispensable
D．men are no longer superior
A.Why is
B.Why is that
C.Is it why
D.Why is it
A．They cost less.
B．They tasted better.
C．They were in fashion.
D．They were widely advertised.
