题目内容
He still keeps in with his college classmates.
A. relation B. tie C. link D. touch
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or anyone who uses a mobile phone, these are worrying times. But speak to the scientists whose work is the focus of these scares and you hear a different story.
tudy. Alan Preece and his colleagues at the University of Bristol placed a device that imitated the microwave radiation of mobile phones to the left ear of volunteers. The volunteers were good at recalling words and pictures they had been shown on a computer screen. Preece says he still can’t comment on the effects of using a mobile phone for years on end. But he rules out the suggestion that mobile phones have an immediate effect on our cognitive（认识的）abilities. “I’m pretty sure there is no effect on short-term memory,” he says.
howed mobile phones could heat the brain“Mobile phone killed my man,” screamed one headline last year. Also came claims that an unpublished study had found that mobile phones could cause memory loss. And a British newspaper devoted its front page to a picture supposedly showing how mobile phones could heat the brain.
F
or anyone who uses a mobile phone, these are worrying times. But speak to the scientists whose work is the focus of these scares and you hear a different story.
One of the oddest effects comes from the now famous “memory loss” s
tudy. Alan Preece and his colleagues at the University of Bristol placed a device that imitated the microwave radiation of mobile phones to the left ear of volunteers. The volunteers were good at recalling words and pictures they had been shown on a computer screen. Preece says he still can’t comment on the effects of using a mobile phone for years on end. But he rules out the suggestion that mobile phones have an immediate effect on our cognitive（认识的）abilities. “I’m pretty sure there is no effect on short-term memory,” he says.
Another expert, Tattersall, remarked that his latest findings have removed fears about memory loss. One result, for instance, suggests that nerve cell synapses（神经元突触） exposed to microwaves become more — rather than less — receptive to undergoing changes linked to memory formation.
An even happier outcome would be that microwaves turned out to be good for you. It sounds crazy, but a couple of years ago a
team led by William Adey at the Veterans Affairs Medical Center in California found that mice exposed to microwaves for two hours a day were less likely to develop brain tumours when given a cancer-causing chemical.
“If it doesn’t certainly cause cancer in animals and cells, then it probably isn’t going to cause cancer in humans,” says William. And while there’s still no absolute evidence that mobile phone use does damage your memories or give you cancer, the conclusion is: don’t be afraid.
【小题1】 Mobile phone users are worried because ______.
| A．they are not sure whether mobile phones can cause memory loss |
| B．it’s said that mobile phones have a lot of side effects |
| C．one headline reported “Mobile phone killed my man” |
D．a British newspaper s howed mobile phones could heat the brain |
| A．the mobile phone is a most wonderful invention |
| B．there’s no need to worry about the radiation from mobile phones |
| C．something must be done to stop people using mobile phones |
| D．mobile phone companies shouldn’t cheat customers |
| A．New Mobile Phones. | B．Special Mobile Phones. |
| C．New Special Investigation: Mobile Phones. | D．New Investigation. |
Nobody Benefits
NEW YORK—America has been experiencing the longest economic increase in its history．Incomes have risen, unemployment has fallen, and cities such as New York are bursting with new office buildings．
But just a short walk from Manhattan's skyscrapers, George Brown sits on the side-walk, cooking a lunch of rice and bits of fish over a can of cooking fuel．
Brown is homeless — one of the 2.3 million people in the US who end up on the street．
During the day, Brown collects aluminium cans and sells them for five cents a piece．At night, he sleeps on the street．w.w.w.k.s.5.u.c.o.m
"I have been on the street about eight or nine years, something like that," said the 62-year-old former construction worker．
Brown admits he's had problems with alcohol and has smoked cocaine．But he said he still wants a more stable housing arrangement．He could afford it just with the money he earns by collecting cans and small pieces of metal, if only truly low-income housing were available．
However, he sees no hope of finding affordable housing in New York．
With the strong economy and unemployment down, beautiful housing is being built to meet demand．
A US report shows rents in New York city rose more than 27 percent between 1984 and 1999, from US $549 to US $700 a month．
One of the side effects of the strong economy is that rents have been going up．
The majority of people who experience homelessness really just need some affordable housing help．
But few housing companies have been built for the poor．Many small apartments in the city now rent for US $1,500 a month or more．
Brown, the homeless New Yorker, said he has a daughter who lives in the city but he rarely sees her．She is angry about his drinking and won't allow it in her house．
Smiling, he said he also has seven grandchildren whom he'd like to see more often．
"All I've got to do is clean up my act," he said．
【小题1】What kind of life does George Brown lead?
| A．Homeless and dangerous． |
| B．Homeless and childish． |
| C．Homeless and miserable （痛苦的）． |
| D．Homeless and sleepless． |
| A．old Americans lead a hard life |
| B．old Americans want to live alone |
| C．American cities are crowded with poor people w.w.w.k.s.5.u.c.o.m |
| D．bad habits play a role in some poor people's Life |
| A．America is short of housing companies |
| B．the poor can't benefit from the increasing economy |
| C．poor people in America will become rich |
| D．housing companies will build more houses for the poor |
| A．Society． | B．Science． | C．Economy． | D．Business． |