选择题:区间为四显示自动闭塞区段,当进站信号机显示( )灯时,表示准许列车经道岔直向位置,进入站内,次架信号 题目分类:石家庄铁道大学-铁路信号基础设备 题目类型:选择题 查看权限:VIP 题目内容: 区间为四显示自动闭塞区段,当进站信号机显示( )灯时,表示准许列车经道岔直向位置,进入站内,次架信号机已经开放一个黄灯。A、 双黄B、 绿C、 黄闪黄D、 绿黄 参考答案:
已知方程组(2X1+X2-X3=0,X1-X2+X3=0,2X1-5X2+4X3=0,X1-4X2+ 已知方程组(2X1+X2-X3=0,X1-X2+X3=0,2X1-5X2+4X3=0,X1-4X2+3X3=0)下列各项中对该方程组解的描述正确的是A、 有无穷 分类:石家庄铁道大学-铁路信号基础设备 题型:选择题 查看答案
—I put him down for a well-educated man. —________ —I put him down for a well-educated man. —___________ ? —I mean that he’s a well 分类:石家庄铁道大学-铁路信号基础设备 题型:选择题 查看答案
I ______ at 130 kilometers per hour when the polic I ______ at 130 kilometers per hour when the policeman stopped me.A、 had drivenB 分类:石家庄铁道大学-铁路信号基础设备 题型:选择题 查看答案
In our daily life, everyone fails every now and th In our daily life, everyone fails every now and then. It is how you react that m 分类:石家庄铁道大学-铁路信号基础设备 题型:选择题 查看答案