下列有关有机化合物的用途及性质的说法正确的是 ( ) A .乙烯使酸性 KMnO 4 溶液或溴的 CCl 4 溶液褪色的原理相同 B .苯与液溴在催化剂作用下生成溴苯发生了加成反应 C .淀粉、蛋白质等营养物质在人体内水解生成水和 CO 2 等 D .用 K 2 Cr 2 O 7 检验司机是否酒驾利 用了乙醇的挥发性和还原性
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...