75. Why did some TT practitioners agree to be the subjects of Emil's experiment? 

A. It involved nothing more than mere guessing. 

B. They thought it was going to be a lot of fun. 

C. It was more straightforward than other experiments. 

D. They sensed no harm in a little girl's experiment.  

(D)

What accounts for the great outburst of major inventions in early America -- breakthroughs such as the telegraph, the steamboat and the weaving machine?

Among the many shaping factors, I would single out the country’s excellent elementary schools: a labor force that welcomed the new technology; the practice of giving premiums to inventors; and above all the American genius for nonverbal, “spatial” thinking about things technological.

Why mention the elementary schools? Because thanks to these schools our early mechanics, especially in the New England and Middle Atlantic states, were generally literate and at home in arithmetic and in some aspects of geometry and trigonometry.

Acute foreign observers related American adaptiveness and inventiveness to this educational-advantage. As a member of a British commission visiting here in 1853 reported, “With a mind prepared by thorough school discipline, the American boy develops rapidly into the skilled workman.”

A further stimulus to invention came from the “premium” system, which preceded our patent system and for years ran parallel with it. This approach, originated abroad, offered inventors medals, cash prizes and other incentives.

In the United States, multitudes of premiums for new devices were awarded at country fairs and at the industrial fairs in major cities. Americans flocked to these fairs to admire the new machines and thus to renew their faith in the beneficence of technological advance.

Given this optimistic approach to technological innovation, the American worker took readily to that special kind of nonverbal thinking required in mechanical technology. As Eugene Ferguson has pointed out, “A technologist thinks about objects that cannot be reduced to unambiguous verbal descriptions: they are dealt with in his mind by a visual, nonverbal process... The designer and the inventor... are able to assemble and manipulate in their minds devices that as yet do not exist.”

This nonverbal “spatial” thinking can be just as creative as painting and writing. Robert Fulton once wrote, “The mechanic should sit down among levers, screws, wedges, wheels, etc., like a poet among the letters of the alphabet, considering them as an exhibition of his thoughts, in which a new arrangement transmits a new idea.”

When all these shaping forces -- schools, open attitudes, the premium system, a genius for spatial thinking -- interacted with one another on the rich U.S. mainland, they produced that American characteristic, emulation. Today that word implies mere imitation. But in earlier times it meant a friendly but competitive striving for fame and excellence.

71. While sleeping, some water mammals tend to keep half awake in order to ________ .  A. alert themselves to the approaching enemy 

B. emerge from water now and then to breathe 

C. be sensitive to the ever?changing environment 

D. avoid being swept away by rapid currents  

(C)

A nine year old schoolgirl single handedly cooks up a science fair experiment that ends up debunking(揭穿……的真相) a widely practiced medical treatment. Emily Rosa's target was a practice known as therapeutic(治疗的) touch (TT for short), whose advocates manipulate patients' "energy field"to make them feel better and even, say some, to cure them of various ills. Yet Emily's test shows that these energy fields can't be detected, even by trained TT practitioners (行医者). Obviously mindful of the publicity value of the situation, Journal editor George Lundberg appeared on TV to declare, "Age doesn't matter. It's good science that matters, and this is good science." 

Emily's mother Linda Rosa, a registered nurse, has been campaigning against TT for nearly a decade. Linda first thought about TT in the late '80s, when she learned it was on the approved list for continuing nursing education in Colorado. Its 100,000 trained practitioners (48,000 in the U. S.) don't even touch their patients. Instead, they waved their hands a few inches from the patient's body, pushing energy fields around until they’re in "balance." TT advocates say these manipulations can help heal wounds, relieve Pain and reduce fever. The claims are taken seriously enough that TT therapists are frequently hired by leading hospitals, at up to $ 70 an hour, to smooth patients' energy, sometimes during surgery. Yet Rosa could not find any evidence that it works. To provide such proof, TT therapists would have to sit down for independent testing--something they haven't been eager to do, even though James Randi has offered more than $1 million to anyone who can demonstrate the existence of a human energy field. (He's had one taker so far. She failed.) A skeptic might conclude that TT practitioners are afraid to lay their beliefs on the line. But who could turn down an innocent fourth grader? Says Emily: “I think they didn't take me very seriously because I'm a kid." 

The experiment was straight forward: 21 TT therapists stuck their hands, palms up, through a screen. Emily held her own hand over one of theirs left or right and the practitioners had to say which hand it was. When the results were recorded, they'd done no better than they would have by simply guessing. If there was an energy field, they couldn't feel it. 

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