低铜银合金粉含有( ) A.Ag,Sn,Cu,Zn B.Ag,Sn,Pa,Z

题库总管2020-05-20  14

问题 低铜银合金粉含有( )A.Ag,Sn,Cu,ZnB.Ag,Sn,Pa,ZnC.Ag,Cu,In,HgD.Ag,Cu,Be,Hg

选项

答案A

解析
转载请注明原文地址:https://ti.zuoweng.com/ti/8QFdKKKQ