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閱讀理解：

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（發(fā)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.

According to Robert Bell,if mobile phones prove to be dangerous to people's health____.

A.they should be banned immediately.

B.the use of them should be restricted.

C.all transmitter towers should be torn down.

D.a warning label should be attached.

正確答案：D

答案解析：本段的第一句話告訴我們：被證實有輻射危險的手機應該帶著標簽。因此答案是A。

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