【判断题】sp 2 杂化是指1个s电子和2个p电子进行杂化。( )
【单选题】Mr.Smith has bought a lot of books for his daughter,__________he?
【单选题】His uncle died and ________ him a lot of money, with which he bought an expensive car.
【单选题】He saved a lot of money___he bought a new house for his marriage.他攒了很多钱因此买了结婚用的新房。
【判断题】在党的十一届三中全会历史转折的重大关头,以邓小平为代表的中国共产党人重新认识中国国情,作出了中国社会的主要矛盾是“人民日益增长的物质文化需要同落后的社会生产之间的矛盾”的科学判断。
【单选题】He bought some books in the bookstore and his father________ him a lot of money.
【单选题】If he ___ the money, he ___ a lot of clothes. [ ]