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For the speaker, the most impressive aspect of an eclipse is the
A．exceptional beauty of the sky.
B．chance for scientific study.
C．effect of the moon on the sun.
A.medieval
B.quasi-modern
C.controversy
D.algebraic
Which of the following is true？
A．Phonetics is the study of pronunciation.
B．Phonetics is the scientific study of the movement of sound waves.
C．Phonetics is the scientific study of the sounds of language.
D．Phonetics is the scientific study of the organs of speech.
This passage is mainly about the author’s ________.
A) interest in the failure of the Skylab
B) willingness to give his advice
C) eagerness to see more new scientific discoveries
D) concern that science cannot answer all questions
Electronic Mail
During the past few years, scientist the world over have suddenly found themselves productively engaged in task they once spent their lives avoiding-writing, any kind of writing but particularly letter writing. Encouraged by electronic mail's surprisingly high speed, convenience and economy, people who never before touched the stuff are regularly, skillfully, even cheerfully tapping out a great deal of correspondence.
Electronic networks, woven into the fabric of scientific communication these days, are the route to colleagues in distant counties, shared data, bulletin boards and electronic journals. Anyone with a personal computer, a modem and the software to link computers over telephone lines can sign on. An estimated five million scientists have done so with more joining every day, most of them communicating through a bundle of interconnected domestic and foreign routes known collectively as the internet, or net. E-mail is staring to edge out the fax, the telephone, overnight mail, and of course, land mail. It shrinks time and distance between scientific collaborators, in par[ because it is conveniently asynchronous (writers can type while their colleagues across time zones sleep; their message will be waiting). If it is not yet speeding discoveries, it is certainly accelerating communication.
Jeremy Bernstei, the physicist and science writer, once called E-mail the physicist's umbilical cord. Lately other people, too, have been discovering its connective virtues. Physicists are using it; college students are using it, everybody is using it, and as a sign that it has come of age, the New Yorker has accelerates its liberating presence with a cartoon--an appreciative dog seated at a keyboard, saying happily, "On the Internet, nobody knows you're a dog."
The reasons given below about the popularity of E-mail can be found in the passage except______
A．direct and reliable
B．time-saving in delivery
C．money-saving
D．available at any time
The old idea that child prodigies (神童) "burn themselves" or "overtax their brains" in the early years, therefore, are prey to failure and (at worst ) mental illness is just a myth. (77) As a matter of fact, the outstanding thing that happens to bright children is that they are very likely to grow into bright adults.
To find this out, 1,500 gifted persons were followed up to their thirty—fifth year with these results:
On adult intelligence tests, they scored as high as they did as children. They were, as a group, in good health, physically and mentally. Eighty-four percent of their group were married and seemed content with their life.
About 70 percent had graduated from colleges, though only 30 percent had graduated with honors. A few had even dropped out, but nearly half of these had returned to graduate.
Of the men, 80 percent were in one of the professions or in business, managers or semiprofessional jobs. The women who had remained single had offices, business, or professional occupations.
The group has published 90 books and 1,500 articles in scientific, scholarly, and literary magazines and had collected more than 100 patents (专利权)
In a material way they didn't do badly either. (78) Average in come was considerably higher among the gifted people, especially the men, than for the country as a whole, despite their comparative youth when last surveyed.
In fact, far from being strange, maladjusted (难以适应) people locked in an ivory tower, most of the gifted were turning their early promises into practical reality.
The main idea of the passage is
A．how many gifted children turned successful when they grew up.
B．That bright children were unlikely to be physically and mentally healthy.
C．That gifted children were most likely to become bright grown—ups.
D．That when the bright children grew up, they would become ordinary.
Many theories for predicting the relationship between cause and effect ______.
A．testify their complete conformity with general scientific principles
B．justify the identity of dependent, independent, and intervening variables
C．specify the time periods of bodily cycles in terms of psychological tests
D．verify their prediction by variables inconsistent with conventions of science
The author compares the pinhole to a lens in order to show ______ .
A．the development of the lens
B．that both operation on the same principle
C．how the early camera operated
D．how primitive scientific thinking was, prior to the 16th century
The passage most probably appears in______.
A．a scientific report
B．a newspaper
C．a textbook
D．a brochure
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