单项选择题
A.定点B.定人C.定时D.定标
A.80mm2B.100mm2C.120mm2D.140mm2
A.0.05MPaB.0.15MPaC.0.25MPaD.0.30MPa
A.35℃B.45℃C.55℃D.65℃
微信扫一扫,加关注免费搜题