单词：Cyanocob
维生素B12
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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. In 2005 two scientists won a Nobel Prize for discovering that a bacterium called Helicobacter pylori causes most stomach ulcers. One of them even chugged a
发表于:2019-01-08 / 阅读(91) / 评论(0)
Scientific American(七)月
Scientific American(七)月
The planet also began releasing oxygen, thanks to an ancient adoption of photosynthesis. A very ancestral primitive plant cell either engulfed or tried to digest or surrounded a cyanobaterium and instead of digesting it, it actually became an organ w
发表于:2019-01-23 / 阅读(103) / 评论(0)
探索与发现2014年
探索与发现2014年
Superglue 强力胶 Male: Help！Help! Female:What's wrong？ M: I was fixing my coffee cup with superglue .And I must have got some on my fingers but I scratch my forhead.And now my hand is stuck to my head. F: Superglue ? Cool! What makes supergl
发表于:2019-01-26 / 阅读(88) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest