双线车站正线进站道岔，为（）的位置为定位。
参考答案：各该线正线开通
His failure was not made public to prevent his look from being seen.
A．embarrassing
B．pleased
C．embarrassed
D．pleasing
下列山脉中既是我国第一、第二阶梯的分界线，又是东西走向的是（ ）
A．祁连山
B．秦岭
C．昆仑山
D．横断山脉
