息止(牙合)间隙一般为 A: 0~1 mm B: 5~7 mm C: 2~4 mm D: 8~10 mm E: 7~8 mm
息止(牙合)间隙一般为 A: 0~1 mm B: 5~7 mm C: 2~4 mm D: 8~10 mm E: 7~8 mm
起动机的驱动齿轮与止推垫之间的间隙应为( )mm A: 1 ~ 4 B: 1 ~ 2 C: 0 . 5 - 1 D: 0 . 5 - 0 . 9
起动机的驱动齿轮与止推垫之间的间隙应为( )mm A: 1 ~ 4 B: 1 ~ 2 C: 0 . 5 - 1 D: 0 . 5 - 0 . 9
在分模数中,1/2M= mm,1/5M= mm,1/10M= mm。
在分模数中,1/2M= mm,1/5M= mm,1/10M= mm。
SS A: 105×(1±10%)mm B: 105×(1士15%)mm C: 106×(1±10%)mm D: 106×(1±15%)mm
SS A: 105×(1±10%)mm B: 105×(1士15%)mm C: 106×(1±10%)mm D: 106×(1±15%)mm
普通单开道岔辙又部分直、侧向轨距均为() A: 1 435 mm B: 1 440 mm C: 1 445 mm D: 1 450 mm
普通单开道岔辙又部分直、侧向轨距均为() A: 1 435 mm B: 1 440 mm C: 1 445 mm D: 1 450 mm
关于AD中单位的换算正确的是 ( ) A: 1 mm=10 mil B: 1 mil=0.0254 mm C: 1 mm=100 mil D: 1 mm=1 mil
关于AD中单位的换算正确的是 ( ) A: 1 mm=10 mil B: 1 mil=0.0254 mm C: 1 mm=100 mil D: 1 mm=1 mil
以下HDB3码中,哪些可以确定其中有误码 A: +1 0 0 0 -1 0 +1 -1 +1 0 0 +1 0 -1 +1 -1 0 0 -1 +1…… B: +1 0 0 -1 +1 0 0 0 +1 -1 0 0 -1 0 0 0 +1 0 0 +1 -1…… C: -1 0 0 0 -1 0 +1 0 0 0 +1 -1 +1 0 0 +1 0 0 -1 +1…… D: -1 0 +1 0 0 0 -1 +1 0 0 0 +1 -1 +1 -1 0 0 -1 +1 0 -1……
以下HDB3码中,哪些可以确定其中有误码 A: +1 0 0 0 -1 0 +1 -1 +1 0 0 +1 0 -1 +1 -1 0 0 -1 +1…… B: +1 0 0 -1 +1 0 0 0 +1 -1 0 0 -1 0 0 0 +1 0 0 +1 -1…… C: -1 0 0 0 -1 0 +1 0 0 0 +1 -1 +1 0 0 +1 0 0 -1 +1…… D: -1 0 +1 0 0 0 -1 +1 0 0 0 +1 -1 +1 -1 0 0 -1 +1 0 -1……
对HDB3码-1000+100-1000-1+1000+1-1+1-100-1+1-1进行译码,结果是( )。 A: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 B: 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 1 C: 1 0 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 D: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 1
对HDB3码-1000+100-1000-1+1000+1-1+1-100-1+1-1进行译码,结果是( )。 A: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 B: 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 1 C: 1 0 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 D: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 1
编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]]
编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]]
ST段在基线上可有偏移,其正常偏移值为() A: 抬高<0.5 mm,压低<1 mm B: 抬高<1 mm,压低<0.5 mm C: 抬高<2 mm,压低<1 mm D: 抬高<3 mm,压低<2 mm E: 抬高<3 mm,压低<2.5 mm
ST段在基线上可有偏移,其正常偏移值为() A: 抬高<0.5 mm,压低<1 mm B: 抬高<1 mm,压低<0.5 mm C: 抬高<2 mm,压低<1 mm D: 抬高<3 mm,压低<2 mm E: 抬高<3 mm,压低<2.5 mm