[填空题]Paragraph Two Happiness research suggests that neither very good events nor very bad events seem to change people’s happiness much in the long term. Most people, it seems, revert back to some kind of baseline happiness level within a couple of years of even the most devastating events, like the death of a spouse or loss of limbs.

[填空题]The research suggests that people increase physical activity to a medium level and pay attention to the choices of their food and calorie intake to maintain ideal weight.

[单项选择]Passage Three New research suggests that animals have a much higher level of brainpower than previously thought. If animals do have intelligence, how do scientists measure it Before defining animals’ intelligence, scientists defined what is not intelligence . Instinct is not intelligence. It is a skill programmed into an animal’s brain . Rote conditioning is also not intelligence. Tricks can be learned by repetition, but no real thinking is involved . Scientists believe that insight(顿悟) the ability to use tools , and communication using human language are all effective measures of the mental ability of animals. Scientists define insight as a flash of sudden understanding . When a young gorilla could not reach fruit from a tree , she noticed some boxes scattered about the lawn near the tree . She piled up the boxes , then climbed on them to reach her reward . The gorilla’s insight allowed her to solve a new problem without trial and error. The ability to use to
A. a sign of intelligence
B. a sign of instinct
C. learned through training
D. programmed in their brain at birth

[单项选择]A growing body of research suggests that chronic illness is not an inevitable consequence of aging, but more often the result of lifestyle choices. "People used to say, ’who would want to be 100 " says Dr. Thomas Perls, an instructor at Harvard Medical School and director of the New England Centenarian Study. "Now they’re realizing it’s an opportunity." High-tech medicine isn’t likely to change the outlook dramatically; drugs and surgery can do only so much to sustain a body once it starts to fail. But there is no question we can lengthen our lives while shortening our deaths. The tools already exist, and they’re within virtually everyone’s reach. Life expectancy in the United States has nearly doubled since a century ago—from 47 years to 76 years. And though centenarians are still rare, they now constitute the fastest growing segment of the U.S. population. Their ranks have increased 16-fold over the past six decades from 3,700 in 1940 to roughly 61,000 today. The Census Bureau
A. the aged should not go to the nursing home
B. we can lengthen our lives through high-tech medicine
C. centenarians die faster than those who are younger
D. the ever-growing Segment of centenarians has caused concern

[简答题]A级 A fast-growing body of research is proving that optimism can help you to be healthier and more successful. Pessimism leads, by contrast, to sickness and failure, and is linked to depression and painful shyness. "If we could teach people to think more positively," says psychologist Michael of Yale University, "it would be like inoculating (接种疫苗) them against these mental ills." "Your abilities count," explains psychologist Smith of Harvard University, "but the belief that you can succeed affects whether or not you will." In part, that’s because optimists and pessimists deal with the same challenges and disappointments in very different ways. Take for example your job. In a major study, Smith and his colleagues surveyed sales representatives at a big life insurance corporation in New York. They found that the optimists among newly-hired representatives sold 37 percent more insurance than did the pessimists. How did they do it The secret to an optimist’s success,

[填空题]The research team suggests that the modem humans in Africa were modem in terms of ______.

[填空题]Some (research) suggests (what) there is a (link between) the body’s calcium balance (and) tooth decay. A. research B. what C. link between D. and

[简答题]research / job stress / mental problems/ suggests/ that / is linked to

[填空题]Impersonal conversation at a distance of two or three feet is normally appropriate for both South Americans and North Americans.

[单项选择]Scientists have known for more than two decades that cancer is a disease of the genes. Something scrambles the DNA inside a nucleus, and suddenly, instead of dividing in a measured fashion, a cell begins to copy itself furiously. Unlike an ordinary cell, it never, stops. But describing the process isn’t the same as figuring it out. Cancer cells are so radically different from normal ones that it’s almost impossible to untangle the sequence of events that made them that way. So for years researchers have been attacking the problem by taking normal cells and trying to determine what changes will turn them cancerous - always Without success.
According to a report in the current issue of Nature, a team of scientists based at M. I .T.’s Whitehead Institute for Biomedical Research has finally managed to make human ceils malignant -a feat they accomplished with two different cell types by inserting just three altered genes into their DNA. While these manipulations were done only in lab d
A. developing malignant cells in human bodies
B. making normal human cells cancerous
C. controlling the change of human cells
D. changing the genes of cancer cells