A:放电时,钠作负极,硫作正极
B:若此电池用作电源电解饱和NaCl溶液,当阳极产生11.2L(标况)气体时,消耗金属钠23g
C:充电时,钠极与外电源的正极相连,硫极与外电源的负极相连
D:充电时,阳极发生的反应是:Sx2--2e=xS
We go to school from Monday to Friday. We have four classes in the____and three in the afternoon. We have____things to do after class. On Monday and____afternoon we have P.E. On Wednesday morning some of us have a singing class. On____morning some have a drawing class. On Friday____we practice speaking English.
位于我国地势第二、三级阶梯上,又是黄土高原与华北平原分界线的山脉是( )