单项选择题
A.受压力B.受剪切C.受弯曲D.受均布
A.横截面B.心部C.表面D.端部
A.2dB.4dC.8dD.10d
A.FbbLs/4WB.Fbbl/2WC.FbbLs/2WD.Fbbl/4W
A.Frbl/4WB.Frbl/2WC.FrbL/4WD.FrbL/2W
A.±0.01mmB.+0.01mmC.-0.01mmD.-0.02mm
A.2mmB.3mmC.5mmD.6mm
A.2倍B.2.5倍C.3倍D.4倍
A.0.10〜0.15mmB.0.15〜0.20mmC.0.20〜0.25mmD.0.25〜0.30mm
A.愈高，晶粒的长大倾向愈大B.愈低，晶粒的长大倾向愈小C.愈高，晶粒的长大倾向愈小D.对奥氏体晶粒的长大没有影响