变电站的应急照明可采用蓄电池作备用电源,其连续供电时间不应少于30min。
参考答案:错
--Jim, put the things away and tidy(整理)your room.
-- Well, but I have ____ work to do, Dad.
A.many
B.a lot
C.lots of
D.too many
当回转式空气预热器的入口烟气温度降至120℃以下时,方可停止回转空气预热器的运行。