题目

下列有机反应的化学方程式正确的是                                (    ) A．CH3CH2Br+NaOHCH2=CH2↑+NaBr+H2O B．2  + 3Br2 → 2 ↓ C．nCH2＝CH－CH3 D．CH3CHO+2Ag(NH3)2OH 2Ag↓+CH3COONH4+3NH3+H2O 答案：D 【详解】 A．溴乙烷在NaOH水溶液中水解生成乙醇和NaBr，反应为CH3CH2Br＋NaOHCH3CH2OH＋NaBr，故A错误； B．苯酚与溴水反应，是苯酚分子中羟基对苯环影响，邻对位氢原子活泼，易于取代反应的化学方程式为  + 3Br2 →↓+3HBr，故B错误； C．丙烯含有碳碳双键，可发生加聚反应生成聚丙烯，反应的方程式为nCH2The flight was put off due to the typhoon. Otherwise, we______ the beautiful scenery in Greece now.A.would be enjoyingB.would have enjoyedC.will enjoyD.must have enjoyed