题目

—Excuse me sir, where is Room 301?   —Just a minute. I’ll have Bob ____you to your room. A. show               B. shows                C. to show              D. showing   答案：A13．下列离子方程式书写正确的是（　　）A．三氯化铁溶液中加入铁粉：Fe3++Fe═2Fe2+B．苯酚钠溶液中通入少量CO2：CO2+H2O+C6H5O-→C6H5OH+HCO3-C．AlCl3溶液中加入足量的氨水：Al3++3OH-═Al（OH）3↓D．用浓盐酸与MnO2反应制取少量氯气：MnO2+4H++4Cl-═Mn2++Cl2↑+2H2O