Passage Three
Questions 32 to 35 are based on the passage you have just heard.

What if you were having a heart attack, but no one believed you A new study of 515 female heart-attack survivors (aged 29 to 97) reveals that this happens all too often.

In the study, 95% said they knew something was seriously wrong a month or more before their heart attack, but none of their doctors had even told them that they had heart disease. And when their heart attack happened, fewer than 30% had chest pain or discomfort, the classic warning signs that most emergency room physicians and nurses look for.

One study volunteer in her mid-30s had a heart attack while driving her children to school. "She had repeatedly sought help for early warning symptoms," says study author Jean McSweeney of the University of Arkansas for Medical Sciences. Despite abnormal cardiac stress test results, she got no treatment. Two weeks later, she nearly died.

Here are the signs that a heart attack may be weeks away: extreme fatigue, disturbed sleep, shortness of breath, and/or anxiety. "If a woman has risk factors for a heart attack and suddenly has unusual symptoms, she needs to tell the doctor that they’re interfering with her everyday activities," McSweeney says. "Be sure of it.

American society is not nap (午睡) friendly. In fact, says David Dinges, a sleep specialist at the University of Pennsylvania School of Medicine. "There’s even a prohibition against admitting we need sleep". Nobody wants to be caught napping or found asleep at work. To quote a proverb: "Some sleep five hours, nature requires seven, laziness nine and wickedness eleven."

Wrong. The way not to fall asleep at work is to take naps when you need them. "We have to totally change our attitude toward napping", says Dr. William Dement of Stanford University, the godfather of sleep research.

Last year a national commission led by Dement identified an" American sleep debt "which one member said was important as the national debt. The commission was concerned about the dangers of sleepness: people causing industrial accidents or falling asleep while driving. This may be why we have a new sleep policy in the White House. According to recent reports, president Clinton is trying to take a half-hour snooze (打瞌睡) every afternoon.

About 60 percent of American adults nap when given the opportunity. We seem to have "a midafternoon quiet phase" also called "a secondary sleep gate". Sleeping 15 minutes to two hours in the early afternoon can reduce stress and make us refreshed. Clearly, we were born to nap.

We superstars of Snooze don’t nap to replace lost shut-eye or to prepare for a night shift. Rather,we "snack" on sleep, whenever, wherever and at whatever time we feel like it. I myself have napped in buses, cars, planes and on boats; on floors and beds; and in libraries, offices and museums.

Long long ago mankind began to use tools. Throughout the world, you can still find the tools which were used over two million years ago. People made such tools by hitting one stone (36) another. By this means, they got pieces from one of the stones. These pieces of stone were always (37) on one side. People utilized them to (38) skin and meat from some animals that were dead, (39) to make other tools from wood. Mankind needed (40) use tools since, unlike other meat-eating (41) , say lions, they did not have sharp teeth. Tools greatly helped people obtain food more (42) .

Tools helped (43) human intelligence as well when human worked with them. The human brain became bigger gradually, and human beings began to invent a growing number of tools. The stone piece was one of the (44) tools that were used by people, and maybe it was (45) . Some scientists hold it was the key (46) human beings’ success.

A new kind of tool has come into people’s view since 1960, that is, the silicon chip a small chip of silicon crystal. It is a bit (47) than a fingernail, but it is able to (48) several million "bits" of information or so. No doubt that it is an (49) brain.

Each year these chips grow cleverer, however (50) size becomes smaller, what’s more, their cost gets (51) .

It is (52) over two million years that human beings used chips, but human (53) changed so little at that time. Now we have made use of silicon chips for merely (54) years, but our life is changing faster with each passing day.

(55) will human life be like in two decades

库普弗细胞(枯否细胞)

B淋巴细胞

C．

T淋巴细胞

D．

T淋巴细胞

E．自然杀伤细胞

Take another magazine.

Take the time to read.

Take a dictionary.

Take the desk away.

Literature.

Philosophy.

Sociology.

History.

A few minutes ago, walking back from lunch, I started to cross the street when I heard the sound of a coin dropping. It wasn’t much but, as I turned, my eyes caught the heads of several other people turning too. A woman had dropped what appeared to be a dime.

The tinkling sound of a coin dropping on pavement is an attention-getter. It can be nothing more than a penny. Whatever the coin is, no one ignores the sound of it. It got me thinking about sounds again.

We are besieged (包围) by so many sounds that attract the most attention. People in New York City seldom turn to look when a fire engine, a police car or an ambulance comes screaming along the street.

When I’m in New York, I’m a New Yorker. I don’t turn either. Like the natives.

At home in my little town in Connecticut, it’s different. The distant wail of a police car, an emergency vehicle or a fire siren brings me to my feet if I’m seated and brings me to the window if I’m in bed.

It’s the quietest sounds that have most effect on us, not the loudest. In the middle of the night, I can hear a dripping tap a hundred yards away through three closed doors. I’ve been hearing little creaking noises and. sounds which my imagination turns into footsteps in the middle of the night for twenty- five years in our house. How come I never hear those sounds in the daytime

They are meaningless.

They will make students learn something useless.

They are believed to cause stress for the students.

They are not related to the reality of life.

Japan.

Cambodia.

Vietnam.

China.