【单选题】下列单位中具有查询、冻结、扣划权力的有( )。
【单选题】对li标记添加( )样式实现将一个垂直导航改为水平导航。
【单选题】Before the final examination, some students have shown ______ of tension. They trouble in sleeping.
【单选题】Before the final exam, many students have shown ______ of tension (紧张). Some have trouble in sleeping while others have lost their appetite (胃口).
【单选题】对li标记添加( )样式定义实现了将一个垂直排列的导航改为水平导航。