题目内容

某烃的分子式为C10H14，它不能使溴水褪色，可使酸性KMnO4溶液褪色，分子结构中只含有一个烷基，符合条件的烃有（）

A. 2种
B. 3种
C. 4种
D. 5种

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某烃的分子式为C10H14，它不能使溴水褪色，可使酸性KMnO4溶液褪色，分子结构中只含有一个烷基，符合条件的烃有（）

A. 2种 B. 3种 C. 4种 D. 5种

伯努利方程说明流体在流动过程中能量的转换关系。

E—601B型蒸发器应多长时间换水为宜？

执法人员当场做出的行政处罚决定，必须报所属行政机关备案。

A. 2种
B. 3种
C. 4种
D. 5种