【单选题】Yesterday I lost my basketball on the way home but today I found_____ like mine on the playground.
【单选题】测定维生素C的含量时,应选用下列何种滴定液
【判断题】有机溶剂萃取中,小分子酸性物质如青霉素的萃取应调节系统 pH 为碱性。
【单选题】—Yesterday I lost my pen. I couldn’t find_______. —Oh, it’s a pity. You’d better buy ________ this afternoon.
【单选题】测定维生素C含量,应选用的滴定液是( )
【单选题】提速道岔断相保护器DCBHQ输入电流为交流( )
【单选题】—Yesterday I lost my pencil sharpener. I couldn't find ________. —Oh, it's a pity. You'd better buy ________ this afternoon. [ ]
【简答题】-- Yesterday I lost my pencil sharpener. I couldn't find . -- Oh, it's a pity. You'd better buy this afternoon.A. it; it B. it; one C. one;it D. one; one