【简答题】At last the man had no choice but _____ the computers from the office. A. admit to have stolen B. admit having stolen C. to admit to have stolen D. to admit having stolen
【简答题】甜樱桃中含有一种羟基酸(用A表示),A的碳链结构无支链,分子式为C 4 H 6 O 5 ,1.34 g A与足量NaHCO 3 溶液反应,生成标准状况下的气体0.448 L。A在一定条件下可发生如下转化: A B C D E 其中,E的分子式为C 4 H 6 O 6 。已知: + +Zn(OH)X (X代表卤原子,R代表烃基),A的合成方法如下: ①F+BrCH 2 —COOCH 2 CH 3 ...