【单选题】—Tom, why did you make no reply to me when I called your name in the street just now? —Sorry, Jim, I_______ to my wife on the phone.
【单选题】已知钨属立方晶系,其晶胞参数a=315.7pm,密度为1.9×10 4 kg/m 3 ,相对分子质量M=183.92,由此可推测该晶体是
【单选题】下列各成本中,不会构成企业实际支出的是( )。
【单选题】已知钨属立方晶系,其晶胞参数a=3.157埃,密度为19.1 g/cm3,分子量为183.92,由此可推测该晶体是( )