But in factories and all other places where radioactive mate试题答案_出自文鼎教育系统乐山师范学院专业英语 B卷

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But in factories and all other places where radioactive materials are used, great care must be taken to prevent anyone form being injured by coming too close to a strong radioactive source or by breathing the radioactive dust, for the rays form radioactive substances can be very dangerous.。
答案是:但是,在使用放射性物质的工厂和其它所有地方,必须特别小心,防止任何人由于靠近强烈的放射源或由于吸进了放射性微尘而受到伤害出自乐山师范学院专业英语 B卷文鼎教育系统乐山师范学院
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