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believe tea, especially green tea, has a lot of benefits for the health. It’s said that it has an effect to resist cancer and protect the heart. However, good clinical studies are quite few. Although physicians often tell patients to drink green tea, there hasn’t been any dependable proof of the value of that advice.
However, a team of Japanese researchers found drinking green tea can clearly decrease death rate. They followed 40,530 healthy adults aged 40 to 79 for up to 11 years in a region of northeastern Japan where most people drink green tea. They found the death rate of those who drank five or more cups of green tea a day is evidently lower than those who drank less than one cup a day, especially, in disease related with heart and blood vessels.
But no such association was seen with deaths from cancer, nor between oolong or black tea and any decrease in death rate. Those teas are easier to be combined with oxygen in processing, which not only darkens the color of the leaves and changes their flavor but also reduces their beneficial content.
Compared with tea, coffee is more controversial. It has received both gold stars and black marks. It, too, contains a matter that is good for health. Evidence for the health benefits of coffee is increasing, however. A group of researchers
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report that coffee seems to protect against age-related decline in mental ability. They studied 676 healthy men born from 1900 to 1920 and followed them for 10 years, using scientific measures of brain function.
Their conclusion shows the men consuming coffee had clearly less decline in mental ability than those who didn’t. Three cups a day seemed to provide the most protection.
21. Physicians often tell patients to drink green tea because_______. A. its medical values has been proved B. it’s believed to be good for health C. it has long been applied in clinic D. its effect has been shown in animals
22. The Japanese study seems to have confirmed the positive effect of green tea on _______.
A. people with mental disabilities B. patients with various cancers B. people with physical disabilities D. patients with heart disease 23. The text indicates that black tea differs from green tea because _________. A. it can keep the color of its leaves
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B. it can reduce cancer-related deaths C. it contains less effective content D. it is stronger in flavor than the latter
24. Coffee is beneficial to one’s health because _______. A. it slows down the rate of brain aging B. it is more beneficial than green tea C. it lowers the rate of natural death rate D. it keeps system of the body active
B
As the rapid development of artificial intelligence(AI), there are growing concerns that robots could become a threat. This danger can be avoided, according to Stuart Russell, a computer science professor, if we figure out how to turn human values into a computer program.
Russell argues that as robots take on more complicated(复杂的) tasks, it’s necessary to have them act on human values. For example, if a robot does chores around the house, you wouldn’t want it to put the pet cat on the stove
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to make dinner for the hungry children. “To prevent the tragedy, you must have it programmed with a good set of values,” said Russell.
At present, some robots are already programmed with basic human values. For example, mobile robots have been programmed to keep a comfortable distance from humans. Obviously there are cultural differences, but if you were talking to another person and he came up close in your personal space, you wouldn’t think that’s the kind of thing a properly brought-up person would do. It will be possible to create more human-friendly moral machines, if only we can find a way to set out human values as clear rules. This isn’t too difficult in technology if humans do resolve to have robots behave according to human moral criteria. After all robots have ability to learn values from drawing patterns from large sets of data on human behavior. They are dangerous only if programmers are careless.
The biggest concern with robots going against human values is that human beings fail to do enough testing and they’ve produced a system that will break some kind of taboo(禁忌). Therefore, it’s necessary to have the robot go
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through a self-check program to make sure it will react by following human values when presented with an unusual situation. 25. What does Russell think about the threat of robots? A. It is a big challenge to computer programmers. B. It’ll push the development of high technology. C. It can be avoided if robots act on human values. D. It’ll be a must as technology gets more complicated.
26. What do you think of a person who gets into your personal space according to the author?
A. Aggressive. B. Outgoing. C. Friendly. D. Bad-mannered.
27. Based on the passage, robots learn human values by _________. A. communicating with humans in everyday life situations B. following the daily routines of civilized human beings C. picking up patterns from huge data on human behavior D. copying the behavior of properly brought-up humans
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2017年全国高考英语模拟试题（三）
