题目

(08山东实验中学诊断)据环保部门测定，我国一些大城市的酸雨pH＝3.5。在酸雨季节铁制品极易腐蚀，则在其腐蚀中正极发生的反应是     （    ）       A．e－2e-＝Fe2+                                          B．2H2O＋O2＋4e-＝4OH-       C．2H+＋2e-＝H2↑                                      D．4OH-－4e-＝2H2O＋O2↑— It's cold in the room. ______ I close the window, Mum? — Yes, you may. [     ]A. Can B. May C. Must D. Can't