MnO2 MnO2 △ △ △ 2H2O2=2H2O+O2 2KClO3=2KCl+3O2 2HgO=2Hg+O2 2Na2O2+2CO2=2Na2CO3+O2, 现要制备等量的O2,则转移的电子数之比为 ( ) A、1:1 :1:1 B、1:2:2:1 C、2:1:1:2 D、1:2:1:2 答案:B When he came back to life, he found himself ____ in the woods and his mobilephone _____. A. lied; had been stolen B. lain; had stolen C. lying; stolen D. laying; was stolen