----Has she finished her work ____? ----Yes, she has. She’s ____ finished it. A yet; already B already; yet C just; already D already; just 答案:A5.下列四个原电池的有关说法正确的是( )A.装置①中SO42-的向Al片移动B.装置②中的Mg片上发生的反应为:2H++2e-═H2↑C.装置③中铁片被氧化,铜片上产生气体D.装置④中若有1摩尔铁锈(氧化铁)生成,理论上有4摩尔电子通过导线