在双轨运输巷中,2列列车最突出部分之间的距离,对开时不得小于()m,采区装载点不得小于0.7m,矿车摘挂钩地点不得小于1m。
A、0.2
B、0.3
C、0.5
参考答案:A
Not until they left school________how much their teachers loved them and helped them.
A.they realized
B.did they realized
C.the would realized
D.had they realized
与CT受检者的辐射剂量无关的是
A.螺距
B.管电流
C.管电压
D.机房屏蔽
E.后准直器