单项选择题
A.1.02 B.1.15 C.1.18 D.1.25
A.5.82 W/mm2,0.68 B.6.01 W/mm2,0.68 C.6.01 W/mm2,0.82 D.5.82 w/mm2,0.82
A.5~6 B.4~5 C.3~4 D.2~3