A.模拟计算机 B.数模混合计算机 C.通用计算机 D.专用计算机
A.don't you B.haven't you C.shall we D.will you
A.Therefore B.Moreover C.But D.However
A．That's very nice of you. B．With pleasure. C．You can, please. D．Thank you for the te
A.than B.to C.with
