五强两比资格考试单项选择题每日一练(2020.03.29)

A.5%
B.8%
C.10%
D.15%

A.80±10mm
B.210±10mm
C.100±10mm
D.120±10mm

A.JC/T681-2005
B.JC/T682-2005
C.JC/T683-2005
D.JC/T723-2005

A.10g
B.20g
C.25g
D.30g

A.6%
B.5%
C.4%
D.3%