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Her arduous efforts had sapped her energy.

We must learn to meet misfortune gracefully.

众所周知，技术革新的速度越来越快。未来社会的变革将超过以往任何时候。作为一个物种，我们人类能否在我们自己发动的这种变革中幸存下来呢？有大量的证据表明我们能。我们人类有巨大的潜能，我们才刚刚开始开发利用。例如，我们才刚刚开始控制环境。将来有一天，技术将使所有的沙漠鲜花盛开。这的确不难。要做到这一点，我们只需要降低海水淡化的成本。接下来的问题是，沙漠变成绿洲后，它们能为我们不断增加的人口提供充足的粮食吗？很可能。最近，我们已经开始发现集约式沙漠农业是可能的。我们已经拥有的技术能将产量提高10倍，用水量减少到从前的1/20。我们知道如何创造农业奇迹。我们需要时间和金钱以便使这项技术为人人所用。在19世纪,人们信仰进步。他们相信科学将带领他们进入一个无限繁荣无限幸福的新时代。然而，事情并没有如他们所想象的那样发展。两次灾难性的世界大战使人们确信了这一点。但是，我们在失望时，在担心科学是一头将来某一天会毁灭我们的巨兽时，却忘记了科学并不是巨兽,我们自己才是巨兽。科学只是一个仆人，像火一样，如果使用得当，它将是个好仆人。尽管现代世界存在着种种问题,大多数人都不会愿意生活在我们之前的任何一个科学欠发达的时代。如果我们不在战争中毁灭白己，未来只会更好。我们每年都将取得令人目不暇接的科学进步：疾病得到根治，太空被征服，运输和通讯取得根本性的变革，农业和工业得到彻底改造等等。对一些人来说，未来听起来令人兴奋；而对另一些人来说,则令人恐怖。但有一点是肯定的：未来不会让人感到乏味。

Navigation computers, now sold by most car-makers, cost $2,000 and up. No surprise, then, that they are most often found in luxury cars, like Lexus, BMW and Audi. But it is a developing technology—meaning prices should eventually drop—and the market does seem to be growing.Even at current prices, a navigation computer is impressive. It can guide you from point to point in most major cities with precise turn-by-turn directions—spoken by a clear human-sounding voice, and written on a screen in front of the driver.The computer works with an antenna that takes signals from no fewer than three of the 24 global positioning system (GPS) satellites. By measuring the time required for a signal to travel between the satellites and the antenna, the car’s location can be pinned down within 100 meters.The satellite signals, along with inputs on speed from a wheel-speed sensor and direction from a meter, determine the car’s position even as it moves. This information is combined with a map database. Streets, landmarks and points of interest are included.Most systems are basically identical. The differences come in hardware—the way the computer accepts the driver’s request for directions and the way it presents the driving instructions. On most systems, a driver enters a desired address, motorway junction or point of interest via a touch screen or disc. But the Lexus screen goes a step further: you can point to any spot on the map screen and get directions to it.BMW’s system offers a set of cross hairs that can be moved across the map (you have several choices of map scale) to pick a point you’d like to get to. Audi’s screen can be switched to TV reception.Even the voices that recite the directions can differ, with better systems like BMW’s and Lexus’s having a wider vocabulary. The instructions are available in French, German, Spanish, Dutch and Italian, as well as English. The driver can also choose parameters for determining the route: fastest, shortest or no freeways.

We sometimes think humans are uniquely vulnerable to anxiety, but stress seems to affect the immune defenses of lower animals too. In one experiment, for example, behavioral immunologist Mark Laudenslager, at the University of Denver, gave mild electric shocks to 24 rats. Half the animals could switch off the current by turning a wheel in their enclosure, while the other half could not. The rats in the two groups were paired so that each time one rat turned the wheel it protected both itself and its helpless partner from the shock. Laudenslager found that the immune response was depressed below normal in the helpless rats but not in those that could turn off the electricity. What he has demonstrated, he believes, is that lack of control over an event, not the experience itself, is what weakens the immune system.Other researchers agree. Jay Weiss, a psychologist at Duke University School of Medicine, has shown that animals who are allowed to control unpleasant stimuli don’t develop sleep disturbances or changes in brain chemistry typical of stressed rats. But if the animals are confronted with situations they have no control over, they later behave passively when faced with experiences they can control. Such findings reinforce psychologists’ suspicions that the experience or perception of helplessness is one of the most harmful factors in depression.One of the most startling examples of how the mind can alter the immune response was discovered by chance. In 1975 psychologist Robert Ader at the University of Rochester School of Medicine conditioned mice to avoid saccharin by simultaneously feeding them the sweetener and injecting them with a drug that while suppressing their immune systems caused stomach upsets. Associating the saccharin with the stomach pains, the mice quickly learned to avoid the sweetener. In order to extinguish this dislike for the sweetener, Ader reexposed the animals to saccharin, this time without the drug, and was astonished to find that those mice that had received the highest amounts of sweetener during their earlier conditioning died. He could only speculate that he had so successfully conditioned the rats that saccharin alone now served to weaken their immune systems enough to kill them.1. Laudenslager’s experiment showed that the immune system of those rats who could turn off the electricity .2. According to the passage, the experience of helplessness causes rats to .3. The reason why the mice in Ader’s experiment avoided saccharin was that .4. The passage tells us that the most probable reason for the death of the mice in Ader’s experiment was that .5. It can be concluded from the passage that the immune systems of animals .

There’s a simple premise behind what Larry Myers does for a living: If you can smell it, you can find it.Myers is the founder of Auburn University’s Institute for Biological Detection Systems, the main task of which is to chase the ultimate in detection devices—an artificial nose. For now, the subject of their research is little more than a stack of gleaming chips tucked away in a laboratory drawer. But soon, such a tool could be hanging from the belts of police, arson investigators and food-safety inspectors.The technology that they are working on would suggest quite reasonably that, within three to five years, we’ll have some workable sensors ready to use. Such devices might find wide use in places that attract terrorists. Police could detect drugs, bodies and bombs hidden in cars, while food inspectors could easily test food and water for contamination.The implications for revolutionary advances in public safety and the food industry are astonishing. But so, too, are the possibilities for abuse. Such machines could determine whether a woman is ovulating, without a physical exam—or even her knowledge.One of the traditional protectors of American liberty is that it has been impossible to search everyone. That’s getting not to be the case.Artificial biosensors created at Auburn work totally differently from anything ever seen before. AromaScan, for example, is a desktop machine based on a bank of chips sensitive to specific chemicals that evaporate into the air. As air is sucked into the machine, chemicals pass over the sensor surfaces and produce changes in the electrical current flowing through them. Those current changes are logged into a computer that sorts out odors based on their electrical signatures.Myers says they expect to load a single fingernail—size chip with thousands of odor receptors, enough to create a sensor that’s nearly as sensitive as a dog’s nose.1. Which of the following is within the capacity of the artificial nose being developed?2. A potential problem which might be caused by the use of an artificial nose is .3. The word “logged” (Para. 6) most probably means “”.4. To produce artificial noses for practical use, it is essential .5. The author’s attitude towards Larry Myers’ work is .

Frustrated with delays in Sacramento, Bay Area officials said Thursday they planned to take matters into their own hands to regulate the region’s growing pile of electronic trash.A San Jose councilwoman and a San Francisco supervisor said they would propose local initiatives aimed at controlling electronic waste if the California law-making body fails to act on two bills stalled in the Assembly. They are among a growing number of California cities and counties that have expressed the same intention.Environmentalists and local governments are increasingly concerned about the toxic hazard posed by old electronic devices and the cost of safely recycling those products. An estimated 6 million televisions and computers are stocked in California homes, and an additional 6,000 to 7,000 computers become outdated every day. The machines contain high levels of lead and other hazardous substances, and are already banned from California landfills.Legislation by Senator Byron Sher would require consumers to pay a recycling fee of up to $30 on every new machine containing a cathode ray tube. Used in almost all video monitors and televisions, those devices contain four to eight pounds of lead each. The fees would go toward setting up recycling programs, providing grants to non-profit agencies that reuse the tubes and rewarding manufacturers that encourage recycling.A separate bill by Los Angeles-area Senator Gloria Romero would require high-tech manufacturers to develop programs to recycle so-called e-waste.If passed, the measures would put California at the forefront of national efforts to manage the refuse of the electronic age.But high-tech groups, including the Silicon Valley Manufacturing Group and the American Electronics Association, oppose the measures, arguing that fees of up to $30 will drive consumers to online, out-of-state retailers.“What really needs to occur is consumer education. Most consumers are unaware they’re not supposed to throw computers in the trash,” said Roxanne Gould, vice president of government relations for the electronics association.Computer recycling should be a local effort and part of residential waste collection programs, she added.Recycling electronic waste is a dangerous and specialized matter, and environmentalists maintain the state must support recycling efforts and ensure that the job isn’t contracted to unscrupulous junk dealers who send the toxic parts overseas.“The graveyard of the high-tech revolution is ending up in rural China,” said Ted Smith, director of the Silicon Valley Toxics Coalition. His group is pushing for an amendment to Sher’s bill that would prevent the export of e-waste.1. What step were Bay Area officials going to take regarding e-waste disposal?2. The two bills stalled in the California Assembly both concern .3. Consumers are not supposed to throw used computers in the trash because .4. High-tech groups believe that if an extra $30 is charged on every TV or computer purchased in California, consumers will .5. We learn from the passage that much of California’s electronic waste has been .

Richard Satava, program manager for advanced medical technologies, has been a driving force in bringing virtual reality to medicine, where computers create a “virtual” or simulated environment for surgeons and other medical practitioners.“With virtual reality we’ll be able to put a surgeon in every trench,” said Satava. He envisaged a time when soldiers who are wounded fighting overseas are put in mobile surgical units equipped with computers.The computers would transmit images of the soldiers to surgeons back in the U.S..The surgeons would look at the soldier through virtual reality helmets that contain a small screen displaying the image of the wound. The doctors would guide robotic instruments in the battlefield mobile surgical unit that operate on the soldier.Although Satava’s vision may be years away from standard operating procedure, scientists are progressing toward virtual reality surgery. Engineers at an international organization in California are developing a tele-operating device. As surgeons watch a three-dimensional image of the surgery, they move instruments that are connected to a computer, which passes their movements to robotic instruments that perform the surgery. The computer provides feedback to the surgeon on force, textures, and sound.These technological wonders may not yet be part of the community hospital setting but increasingly some of the machinery is finding its way into civilian medicine. At Wayne State University Medical School, surgeon Lucia Zamorano takes images of the brain from computerized scans and uses a computer program to produce a 3-D image. She can then maneuver the 3-D image on the computer screen to map the shortest, least invasive surgical path to the tumor. Zamorano is also using technology that attaches a probe to surgical instruments so that she can track their positions. While cutting away a tumor deep in the brain, she watches the movement of her surgical tools in a computer graphics image of the patient’s brain taken before surgery.During these procedures—operations that are done through small cuts in the body in which a miniature camera and surgical tools are maneuvered—surgeons are wearing 3-D glasses for a better view. And they are commanding robot surgeons to cut away tissue more accurately than human surgeons can.Satava says, “We are in the midst of a fundamental change in the field of medicine.”1. According to Richard Satava, the application of virtual reality to medicine .2. Richard Satava has visions of .3. How is virtual reality surgery performed?4. During virtual reality operations, the surgeon can have a better view of the cuts in the body because .5. Virtual reality operations are an improvement on conventional surgery in that they .

For the past two years, I have been working on students’ evaluation of classroom teaching. I have kept a record of informal conversations _1_ some 300 students from at _2_ twenty-one colleges and universities. The students were generally _3_ and direct in their comments _4_ how course work could be better _5_. Most of their remarks were kindly _6_ —with tolerance rather than bitterness—and frequently were softened by the _7_ that the students were speaking _8_ some, not all, instructors. Nevertheless, _9_ the following suggestions and comments indicate, students feel _10_ with things as they are in the classroom.Professors should be _11_ from reading lecture notes. “It makes their _12_ monotonous.”If they are going to read, why not _13_ out copies of the lecture? Then we _14_ need to go to class. Professors should _15_ repeating in lectures material that is in the textbook. “_16_ we’ve read the material, we want to _17_ it or hear it elaborated on, _18_ repeated.” “A lot of students hate to buy a _19_ text that the professor has written _20_ to have his lectures repeat it.”

They are ____ investors who always make thorough investigations both on local and international markets before making an investment.

I had eaten Chinese food often, but I could not have imagined how ____ and extravagant a real Chinese banquet could be.

Many countries have adopted systems of ____ education in order to promote the average level of education.

Doctors are interested in using lasers as a surgical tool in operations on people who are ____ to heart attack.

Diamonds have little ____ value and their price depends almost entirely on their scarcity.

Allen will soon find out that real life is seldom as simple as it is ____ in commercials.

It is fortunate for the old couple that their son’s career goals and their wishes for him ____.

We all enjoy our freedom of choice and do not like to see it ____ when it is within the legal and moral boundaries of society.

I found it difficult to ____ my career ambitions with the need to bring up my children.

In November 1987 the government ____ a public debate on the future direction of official sports policy.

As visiting scholars, they willingly ____ to the customs of the country they live in.

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