题目内容
M: Sure．I would tell him if I saw him．But he seems to be disappearing in the past couple of days．
Q: What does the man mean？
(16)
查看答案
搜索结果不匹配？点我反馈
更多问题
Progressives tried to resolve these problems by organizing ideas and actions around three basic themes. First, they sought to end abuses of power. Second, progressives aimed to replace corrupt power with the power of reformed institutions such as schools, charities, medical clinics, and the family. Third, progressives wanted to apply principles of science and efficiency on a nationwide scale to all economic, social, and political institutions, to minimize social and economic disorder and to establish cooperation, especially, between business and government, that would end wasteful competition and labor conflict.
Befitting their name, progressives had strong faith in the ability of humankind to create a better world. More than ever before, Americans looked to government as an agent of the people that could and should intervene in social and economic relations to protect the common good and substitute public interest for self-interest.
The passage is primarily concerned with ______.
According to the passage, all of the following are the causes for the population explosion
Should doctors ever lie to benefit their patients--to speed recovery or to conceal the approach of death？ In medicine as in law, government, and other lines of work, the requirements of honesty of- ten seem dwarfed by greater needs: the need to shelter from brutal news or to uphold a promise of secrecy.
What should doctors say, for example, to a 46-year-old man coming in for a routine physical checkup who, though he feels in perfect health, is found to have a form. of cancer？ If he asks, should the doctor deny that he is ill, or minimize the gravity of the illness？ Doctors confront such choices often and urgently. At times, they see important reasons to lie for the patient's own sake. In their eyes, such lies differ sharply from self-serving ones.
Studies show that most doctors sincerely believe that the seriously ill do not want to know the truth about their condition, and that informing them risks destroying their hope, so that they may re- cover more slowly, or deteriorate faster, perhaps even commit suicide. As one physician wrote: "Ours is a profession which traditionally has been guided by a precept that transcends the virtue of uttering the truth for truth's sake and that is, as far as possible'do no harm'." Armed with such a precept, a number of doctors may slip into deceptive practices that they assume will "do no harm" and may well help their patients.
But the illusory nature of the benefits such deception is meant to produce is now coming to be documented. Studies show that, contrary to the belief of many physicians, an overwhelming majority of patients do want to be told the truth, even about grave illness, and feel betrayed when they learn that they have been misled. We are also learning that truthful information, humanely conveyed, helps patients cope with illness.
Not only do lies not provide the "help" hoped for by advocates of benevolent deception, they invade the autonomy of patients and render them unable to make informed choices concerning their own health.
Lies also do harms to those who tell them: harm to their integrity and, in the long run, to their credibility. Lies hurt their colleagues as well. The suspicion of deceit undercuts the work of the many doctors who are scrupulously honest with their patients; it contributes to the spiral of lawsuits and of "defensive medicine", and thus it injures, in turn, the entire medical profession.
Who are most likely to lie for serving purposes？
Imagine an accident in which a nuclear power plant releases radioactive gas. The cloud starts moving with the wind. Clearly, the authorities will want to evacuate anyone in its path, but what is that path？ Local wind information is meaningless without information about terrain, a mountain range or series of valleys can divert both wind and gas in unpredictable directions.
To make "downwind" a useful term, scientists at Lawrence Livermore National Laboratory have put the United States on a computer, the entire United States-every hill, every valley, every mile of seashore. Within minutes of a disaster, they can give meteorologists a context for weather data, and thus the ability to predict how toxic gases might spread.
The database for this computer map is a series of altitude measurements, made over many years by the Defense Department and the U.S. Geological Survey. They represent the height above sea level of over a billion separate points--a grid of points 200 feet apart, spanning the country. Armed with these data, plus a program that manipulates them, a Cray-1 computer can produce an image of any piece of terrain, seen from any angle, illuminated by an imaginary sun at any time of day placing the "observer" at any altitude from zero to 40,000 feet.
"We use a technique called ray tracing," says Patrick Weidhaas, one of the Livermore computer scientists who wrote the program. The computer is told where the observer is. The program traces an imaginary ray from there outward until it "intersects" with one of the points' of altitude recorded in the machine' s memory. The computer then puts a dot of color at the proper place on the screen, and the program traces another ray.
At its highest resolution of 2,000 horizontal and 1,700 vertical dots per picture, the computer has to trace several million rays. Even on the Cray, the most powerful computer in the world, this takes about a minute. Reducing the resolution to 400～300 (a TV screen has 800 x 700) speeds it up to about eight seconds. "We can't produce a movie simulating flight on the screen in real time," says Weidhaas. There is a way around the problem: Two movies have been made using still pictures generated by the computer as individual frames. "The results were impressive," he says, "but it was cumbersome to do. At twenty-four frames per second, it takes fourteen hundred separate computer images to make a one-minute film." Another limitation. The computer can access only enough memory to cover a 15-mile-square area. An "observer" high up will see blank spaces beyond those limits.
Weidhaas wants to add information about what overlies the terrain-cities, vegetation, roads, and so on. "Making the image as realistic as possible will make our advice more effective," he says, "and might lead to uses we haven't thought of yet."
As used in the first paragraph, terrain most clearly means ______.
微信支付 
支付宝支付