单选题:下列说法正确的是( )A纤维素属于髙分子化合物,与淀粉互为同分异构体,水解后均生成葡萄糖B2,3一二甲基丁烷的H一NMR上有5个峰C含5个碳原子的有机物,每个分

题目内容:

下列说法正确的是(   )

A纤维素属于髙分子化合物,与淀粉互为同分异构体,水解后均生成葡萄糖

B2,3一二甲基丁烷的H一NMR上有5个峰

C含5个碳原子的有机物,每个分子中最多可形成4个C一C单键

D
​​​​​​​某有机物结构如图所示,该有机物属于芳香族化合物的同分异构体有5种,其中遇FeCl3能显色的有3种

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为了防止食品变质,常在食品袋中放入小袋的铁粉,这是利用铁的( ) A还原性B氧化性C酸性D碱性

为了防止食品变质,常在食品袋中放入小袋的铁粉,这是利用铁的( ) A还原性B氧化性C酸性D碱性

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酸具有共同的性质,是因为()。A都能电离出氢离子B都能使石蕊试液变红C都能跟碱反应生成盐和水D都含有氧元素

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“...the skill of the fakers grew increasingly refined” in the third paragraph means that _______.Athere was a great dema

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