A.10∶1                        B.5∶1                         C.1∶1                           D.1∶10

A.10∶1             B.5∶1                   C.1∶1                D.1∶10

A.10∶1                 B.5∶1                   C.1∶1                 D.1∶10

若1体积硫酸恰好与10体积pH=11的氢氧化钠溶液完全反应，则二者物质的量浓度之比应为（    ）                                                                                                    

         A．10:1                          B．5:1                             C．1:1                             D．1:10