乙烯催化氧化成乙醛可设计下图所示的燃料电池,能在制备乙醛的同时获得电能,其总反应为: 2CH 2 = CH 2 + O 2 → 2CH 3 CHO。 下列有关说法正确的是 ( ) A.该电池为可充电电池 B. 每有 0.1mol O 2 反应,则迁移 H + 0.4mol C.正极反应式为:CH 2 = CH 2 - 2e - + 2OH - = CH 3 CHO + H 2 O D. 电子移动方向:电极 a→磷酸溶液→电极 b
【简答题】词汇运用 1. She is fully ________(忙于) in looking after three small children. 2. Too much stress and tiredness often lead to the lack of ________(集中注意力学习). 3. He ________(被指控) stealing things from the supe...