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本帖最后由 醉酒当歌 于 2014-4-20 23:48 编辑 , C, O( J$ a( {( f
wlwlwlwl 发表于 2014-4-20 22:52 
) Z8 ~& ~$ f) K5 k我真是不知道你查的是哪本书。问你,ketone的分子式 RC(=O)R' 能写成 Cm(H2O)n 的形式么?
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A carbohydrate is a large biological molecule, or macromolecule, consisting of carbon (C), hydrogen (H), and oxygen (O) atoms, usually with a hydrogen:oxygen atom ratio of 2:1 (as in water); in other words, with the empirical formula Cm(H2O)n (where m could be different from n).[1] Some exceptions exist; for example, deoxyribose, a sugar component of DNA,[2] has the empirical formula C5H10O4.[3] Carbohydrates are technically hydrates of carbon;[4] structurally it is more accurate to view them as polyhydroxy aldehydes and ketones.[5]- @6 `/ _7 k' f8 s- m+ E4 _) I
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全称是Polyhydroxyl Ketone or polyhydroxy aldehydes. 你说的分子式没错。) T7 k: {3 T( t& @" h* K
- y; A w% K9 tCarbonhydrates不是都能吃。你说的充分还是必要条件,本身就与你的逻辑命题相违背。 |
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