题目

下列有机反应中,属于消去反应的是(    )A.苯与浓硫酸、浓硝酸混合,温度保持在50—60 ℃B.溴丙烷与NaOH溶液混合,静置C.乙醇与浓硫酸共热,保持140 ℃D.1-氯丁烷与乙醇、KOH共热 答案:解析:苯与浓硫酸、浓硝酸混合是硝化反应,属于取代反应;溴丙烷与NaOH溶液混合是水解反应,属于取代反应;乙醇与浓硫酸共热保持140 ℃,属于取代反应;而D项是高中阶段学习的典型消去反应。答案:D根据语境从方框中选择恰当的短语填空,有的需要变换形式a few days earlier, pick up across the kitchen, as soon as, hurry to(1)This morning Johnhis company to work without breakfast.(2)Would you mindthe b6ok on the ground for me?(3) Kate got a postcard from Alice.(4)Mum asks me to do my homework firstshe gets home.(5)He walkedinto the living room.
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