登錄
所屬欄目：綠色空間
所屬頻道：CCTV-10科教
年份：2010
展開全部
簡介：2006年9月，世界衛生組織宣佈解除對DDT的禁令，允許部分地區重新使用這種殺蟲劑，曾經，這種殺蟲劑曾一度大範圍破壞環境，然而禁用DDT，瘧疾傷寒等疾病又有捲土重來的趨勢……收起
看不見的威脅（五）
看不見的威脅 四
看不見的威脅 三
看不見的威脅 二
看不見的威脅 一
複製成功！
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