【单选题】在我国核应急组织体系中,负责 “履行国际公约,向国际社会通报事故进展及救援情况”的是( )
【简答题】You look, as though you need a rest. I suggest a______vacation in the country.
【单选题】I suggest that the students each __________ a plan for the summer vacation. ( )
【单选题】视情维修与定时维修相比,维修的针对性()。
【判断题】双线自动闭塞双线区间封锁一条线路时,正方向行车,仍应按基本闭塞法行车。