题目

Derek knew they were talking about him, but he couldn’t ___________ what they were saying because it was too noisy there. A．make out             B．listen to               C．hear of                   D．learn of 答案：A 有关下图所示化合物的说法不正确的是 A．既可以与Br2的CCl4溶液发生加成反应，又可以在光照下与Br2发生取代反应 B．1 mol该化合物最多可以与3 mol NaOH反应 C．既可以催化加氢，又可以使酸性KMnO4溶液褪色 D．既可以与FeCl3溶液发生显色反应，又可以与NaHCO3溶液反应放出CO2气体