题目

 My demand is that the information_______ in my report _____ to Mr. Brown without delay.     A. referred to, to be e-mailed            B. referring to ,e-mailed            C. referred to, be e-mailed               D. referring to, being e-mailed 答案：C1．下列离子反应方程式错误的是（　　）A．氯气溶于水：Cl2+H2O═2H++Cl-+ClO-B．Ba（OH）2溶液与H2SO4溶液反应：Ba2++2H++2OH-+SO42-═BaSO4↓+2H2OC．Na2CO3溶液与稀硝酸反应：CO32-+2H+═CO2↑+H2OD．NH4Cl 溶液显酸性：NH4++H2O?NH3•H2O+H+