【单选题】某化合物分子式为 C10H6N2O4 ,其不饱和度是
【多选题】与客户沟通交流中,提问问题的类型包括()
【判断题】A car rental agency allows users to return a vehicle to the same location.
【多选题】想要判断作品时代的标准,可以通过该作品的()进行研究。
【单选题】One day a car rental agency rented 2/3 of its cars, including 3/5 of its cars with CD players. If 3/4 of its cars have CD players, what percent of the cars that were not rented had CD players?
【简答题】某化合物分子式为C 3 H 7 O 2 N,有光学活性,能分别与NaOH或HCl成盐,并能与醇成酯,与HNO 2 作用时放出氮气,写出此化合物的结构式。
【简答题】A.To a real estate agency. B.To a car rental agency. C.To a computer store. D.To a music store.