4、5y=5D.x=10y=106、Ifaderivedclassisgainedfromabaseclassbyprivateinherit,theprivateandpublicmembersinthebaseclasswillbecome()membersforderivedclass.A. public B.private C.protected D.friend7、Foroperatoroverloading,()iscorrect.A.ThenumberofoperandscanbechangedB.Thepriorityforoperators