题目

Drivers shouldn't be allowed _______ after drinking, or they will break the law. A. drive                   B. driving                C. to drive 答案：C解析:略下列离子方程式正确的是（　　）A．FeCl2溶液中通入Cl2：Fe2++Cl2?Fe3++2Cl-B．Cl2与水反应：Cl2+H2O?2H++Cl-+ClO-C．Al2（SO4）3溶液加入过量的氨水：Al3++3 NH3?H2O?Al（OH）3↓+3NH4+D．NaOH溶液与少量Ca（HCO3）2溶液反应：Ca2++HCO3-+OH-?CaCO3↓+H2O