【单选题】下列溶液中除存在水分子外,还存在其它分子的是( )
【单选题】After the robbery, the shop installed a sophisticated alarm system as an insurance ______ further losses.
【单选题】信息资源具有非消耗性,信息资源一旦产生,不仅可以满足同时期人类的需要,还可以通过信息的保存、积累、传递达到时间点上的延续,这是信息的()特性
【单选题】在水溶液中,对简单金属离子而言,大致以()分族元素为界线;位于其左方的金属元素不能在水溶液中的阴极上还原电沉积;位于其右方的金属元素都能较容易地自水溶液中在阴极上还原电沉积出来。
【简答题】After the robbery,the police arrived at the scene of the ______ to take the statements from the victim and the witness. 抢劫案发生后,警察赶到现场从受害人和目击者那里取证。
【简答题】After the robbery, the shop installed a sophisticate alarm system as an insurance ________ further losses. A) for B) from C) against D) towards
【单选题】After the robbery, the shop installed a sophisticated alarm system as an insurance______ further losses.
【单选题】After the robbery, the police arrived at ______scene in _____ flash. [ ]