理工類A級：補全短文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 should be built until the long-term health effects of the electromagnetic radiation they emit is scientifically evaluated， he said. "Nobodys going to drop dead overnight but we should be asking for more scientific information，" Robert Bells said at a conference on the health effects of low-level radiation ."If mobile phones are found to be dangerous， ____1____until proper shields can be devised，" he said.

　　A report widely circulated among the public says that up to now scientists do not really know enough to guarantee there are no ill-effects on humans from electromagnetic 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:___2__

　　As well， there are 2，000 transmitter towers around Australia， many in high density residential areas. For example， Telstra ， Optus and Vodaphone build their towers ___3___and disregard the need of the community. The electromagnetic radiation emitted from these towers may have already produced some harmful effects on the health of the residents nearby.

　　Robert Bell suggests that____4___ the Government should ban construction of phone towers from within a 500 metre radius of school grounds， child care centres， 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 electromagnetic waves _____5_____.

　　Robert Bell calls on the major telephone companies to fund adequate research and urges the Government to set up a wide ranging inquiry into possible health effects.

　　A. until more research is completed

　　B. nearly one for every two people

　　C. they should carry a warning label

　　D. mobile phones should be radiation-free

　　E. where it is geographically suitable to them

　　F. the growth rate of the disease accelerate

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