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本帖最后由 醉酒当歌 于 2014-4-20 23:48 编辑
' b, U: I. L! u( \# @) Y% z; G9 Hwlwlwlwl 发表于 2014-4-20 22:52 
' A; _0 r: \! y6 Q1 h* M$ {9 \( u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? 8 Q1 Y8 t1 z, D7 _$ b# _* i
( U0 V0 F2 l" M( K2 X! {% ^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]
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6 D9 }; i" {" Q. ]" o9 v; c9 ?+ G- E全称是Polyhydroxyl Ketone or polyhydroxy aldehydes. 你说的分子式没错。
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7 N- U+ I0 p2 nCarbonhydrates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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