根据下面短文内容，回答题。 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 should be build until the long-term health effects of the electromagnetic (电磁的) radiation they emit is scientifically evaluated, he said. "Nobody&39;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. __________ (46) 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 electromagnetic radiation. According to Robert Bell, there are 3.3 million mobile phones in Australia alone and they are increasing by 32,000 a day.__________(47) As well, there are 2,000 transmitter towers around Australia, many in high density (密度)residential areas. __________ (48) 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 until more research is completed the Government should ban construction of phone towers from within a 500 metre radius of school grounds, child care centres,hospitals, sports playing fields ( 隔离屏) and residential areas with a high percentage of children. __________ (49) He adds that there is also evidence that if cancer sufferers are subjected to electromagnetic waves the growth rate of the disease accelerates (加速，加快 ). __________ (50) According to Robert Bell, it is reasonable for the major telephone companies to fund it. Besides, he also urges the Government to set up a wide ranging inquiry into possible health effects. 第46题___________ 查看材料