碳的质量分数w<sub>C</sub>为()的调质钢,调质处理后的零件具有高的强度、韧性和塑性等综合力学性能。
A、0.1%~0.2%
B、0.25%~0.50%
C、0.6%~1.0%
D、1.0%~1.2%
A、0.1%~0.2%
B、0.25%~0.50%
C、0.6%~1.0%
D、1.0%~1.2%
A、W<sub>1sub>>W<sub>2sub>>W<sub>3sub> B、W<sub>3sub>>W<sub>2sub>>W<sub>1sub> C、W<sub>2sub>>W<sub>1sub>>W<sub>3sub> D、W<sub>3sub>>W<sub>1sub>>W<sub>2sub>
A、W<sub>ssub>=3600m/s、W<sub>csub>=3700m/s B、W<sub>ssub>=3700m/s、W<sub>csub>=3800m/s C、W<sub>ssub>=3800m/s、W<sub>csub>=3700m/s D、W<sub>ssub>=3700m/s、W<sub>csub>=3700m/s
A、W<sub>Esub>=1,M<sub>Esub>=0 B、W<sub>Esub>=1,M<sub>Esub>=1 C、W<sub>Esub>=0,M<sub>Esub>=0 D、W<sub>Esub>=0,M<sub>Esub>=1
A、W<sub>0sub>=2W<sub>2sub>-W<sub>1sub> B、W<sub>0sub>=2W<sub>1sub>-W<sub>2sub> C、W<sub>0sub>=W<sub>1sub>-2W<sub>2sub> D、W<sub>0sub>=W<sub>2sub>-2W<sub>1sub>
A、100W<sub>干sub>/100-M<sub>水sub> B、100-M<sub>水sub>/100W<sub>干sub> C、W<sub>干sub>/1-M<sub>水sub>
A、△H<sub>1sub>〉△H<sub>2sub>,W<sub>1sub>〈W<sub>2sub> B、△H<sub>1sub>〈△H<sub>2sub>,W<sub>1sub>〉W<sub>2sub> C、△H<sub>1sub>=△H<sub>2sub>,W<sub>1sub>〈W<sub>2sub> D、△H<sub>1sub>=△H<sub>2sub>,W<sub>1sub>〉W<sub>2sub>
A、不平衡重量W<sub>1sub>,W<sub>2sub>通过轴心线同一平面上且在轴心线同一侧 B、不平衡重量W<sub>1sub>,W<sub>2sub>通过轴心线同一平面且在轴心线两侧 C、不平衡重量W<sub>1sub>,W<sub>2sub>即不在轴心线平面上,也不在轴心线同一侧
A、△H<sub>1sub>〈△H<sub>2sub>,W<sub>1sub>〉W<sub>2sub> B、△H<sub>1sub>〉△H<sub>2sub>,W<sub>1sub>〈W<sub>2sub> C、△H<sub>1sub>〈△H<sub>2sub>,W<sub>1sub>〈W<sub>2sub> D、△H<sub>1sub>〉△H<sub>2sub>,W<sub>1sub>〉W<sub>2sub>
A、C<sub>fsub>>C<sub>0sub>>C<sub>wsub> B、C<sub>0sub>>C<sub>wsub>>C<sub>fsub> C、C<sub>wsub>>C<sub>fsub>>C<sub>0sub> D、C<sub>0sub>>C<sub>fsub>>C<sub>wsub>
A、作业高度2m<h<sub>wsub>≤5m,高处作业分级为Ⅰ级 B、作业高度2m<h<sub>wsub>≤5m,高处作业分级为Ⅱ级 C、作业高度5m<h<sub>wsub>≤15m,高处作业分级为Ⅱ级 D、作业高度5m<h<sub>wsub>≤15m,高处作业分级为Ⅲ级 E、作业高度15m<h<sub>wsub>≤30m,高处作业分级为Ⅲ级