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The experiment shows that salt changes the behaviour of
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根据下列文章,请回答 31～35 题。
Mobile Phones
Mobile phones should carry a label if they proved to be a dangerous source of radiation, according to Robert Bell, a scientist. And no more mobile phone transmitter towers (发射塔) should be built until the long-term health effects of the radiation they emit(放射) is scientifically evaluated, he said. "Nobody's going to drop dead overnight but we should be asking for more scientific information," Robert Bell said at a conference on the health effects of low-level radiation. "If mobile phones are found to be dangerous, they should carry a warning label until proper shields can be devised," he said.
A report widely circulated (传播) among the public says that up to now scientists do not really know enough to guarantee there are no ill effects on humans from radiation. According to Robert Bell, there are 3.3 million mobile phones in Australia alone and they are increasing by 2,000 a day. By the year 2000 it is estimated that Australia will have 8 million mobile phones: nearly one for every two people.
As well, there are 2,000 transmitter towers around Australia, many in high density(密度) residential areas. For example, Telstra, Optus and Vodaphone build their towers where it is geographically suitable to them and disregard the need of the community. The radiation emitted from these towers may have already produced some harmful effects on the health of the residents nearby.
Robert Bell suggests that until more research is completed the government should ban construction of phone towers from within a 500 meter radius (半径) of school grounds, child care centers, hospitals, sports playing fields and residential areas with a high percentage of children. He says there is emerging evidence that children absorb low-level radiation at a rate more than three times that of adults. He adds that there is also evidence that if cancer sufferers are subjected to radiation the growth rate of the disease accelerates (提高).
Robert Bell calls on the major telephone companies to fund adequate research and urges (敦促) the government to set up a wide ranging inquiry into possible health effects.
第 31 题 According to Robert Bell, if mobile phones prove to be dangerous to people's health,
A．street B．roadC．wayD．trail
根据短文回答 36～40 题。
On the Train
The night train from Glasgow was SO crowded that Donald。who was on his way to London to find a temporary job for the university vacation,wished that he had decided to travel by day.He had never been SO hard up.
He got on the train and walked along the corridor of the second-class compartments.He couldn't find a seat anywhere.He could not afford to travel first class.and he did not want to stand in the corridor.Neither did he want to sit on his suitcase.He was SO tired that he decided 10 sit down in a first class compartment—at Least for a while.He Soon found one with a single occupant(乘客),a gentleman reading documents from a briefcase.With the self-assurance of a first-class traveler, he opened the door and went in.No sooner had he sat down than the ticket inspector arrived.What bad luck! Now he would have to pay the excess(额外的)fare.As he turned out his pocket to find enough money he saw the gentleman was watching him with amusement.It was humiliating(羞辱的).However, he was so tired that he soon fell asleep.
Presently。hearing a noise,he half opened his eyes.Not only did he notice that his traveling companion had gone,but he also saw that a rough—looking man was searching through the businessman's briefcase.Donald grabbed the briefcase and wrenched(猛夺)it free,kicking at the man's leg.The man fled.
Then the businessman returned and found Donald holding the briefcase and peering inside it.Donald realized that he was in quite an awkward situation,but the man was smiling.Nor was this the only surprising thin9.Not only was the gentleman (who introduced himself as Mr.Smith)smiling,but he thanked Donald warmly.On his way back to the compartment,Mr.Smith had seen the man leaving in a great hurry.He had so quickly assessed the situation that he knew Donald was innocent.
Only after a long chat,in which Donald was asked many questions about himself.Did Donald discover that Mr.Smith was in fact managing director of a large factory in London.Donald had never imagined that this strange incident Would help him to find a job,but just as they were leaving the train。Mr.Smith offered him the post of temporary Night Security Officer for his factory.
第 36 题 The train Donald took was（）
A．open B．likelyC．differentD．precise
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