[=2',3'-dideoxythymidine triphosphate]2',3'-双脱氧胸苷三磷酸

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African Countries Debate Using DDT in Anti-Malaria Efforts The chemical pesticide DDT has been banned by most countries for use in agriculture, but some continue to use it indoors to kill insects that carry malaria. In Zambia, it's an important part

发表于:2019-01-14 / 阅读(151) / 评论(0)

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发表于:2019-01-16 / 阅读(139) / 评论(0)

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By Jim Teeple Jerusalem 17 May 2007 Israeli aircraft carried out air strikes against Hamas militants in the Gaza Strip and Israeli tanks moved to the Gaza border on Thursday. VOA's Jim Teeple reports a planned meeting of Palestinian leaders in Gaza w

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2007年VOA标准英语（五月）

2006年VOA标准英语-Environmentalists Urge Elimination of DDT

By Lisa Schlein Geneva 02 May 2006 Environmentalists are calling for the elimination of the toxic chemical, DDT, which is still used in large parts of Africa to combat malaria. The continued use of DD

发表于:2019-02-12 / 阅读(257) / 评论(0)

2006年VOA标准英语（五月）

Debate Rages Over DDT Use in Uganda

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发表于:2019-02-17 / 阅读(143) / 评论(0)

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Borsche carbazole synthesis