题目

—________？ —Because I hate doing chores. A．Must I clean the car B．Why don't you make breakfast C．Would you like to have some coffee D．Who is the most popular in our class 答案：B15．下列各组微粒的空间构型相同的是（　　）①NH3和H2O　②NH4+和H3O+　③NH3和H3O+　④O3和SO2⑤CO2和BeCl2　⑥SiO4-和SO42-　⑦BF3和Al2Cl6．A．全部B．除④⑥⑦以外C．③④⑤⑥D．②⑤⑥