【简答题】Listen to the talk and choose the best answer to the questions you hear. 1. (a) Not being late for work. (b) A dapting to your new job and colleagues. ( c) Getting on with your line manager. (d) Askin...
【单选题】苯甲酰丙酮既能与FeCl3作用,又能与羰基试剂作用,是由于分子中存在
【单选题】苯甲酰丙酮既能与FeCl3溶液显色,又能与羰基试剂作用,是由于分子中存在