单项选择题
A.铂坩埚 B.镍坩埚 C.铁坩埚 D.石英坩埚
A.1~10% B.0.1~1% C.<0.01% D.<0.001%
A.24.737±0.001(%) B.24.737±0.010(%) C.24.737±0.100(%) D.24.737±1.000(%)