简述在既有线CTCS-2级区段,应答器的设置的类型。
参考答案:
1.在进站口外方设置有源和无源应答器组
2.区间设置无源应答器(组)
3.设置特殊用途的应答器(组)
―How do you like the novel Harry Potter?
―It’s very interesting, so it is worth .[ ]
A. read
B. reading
C. to read
D. be read
预制构件应按标准图或设计的要求吊装。起吊时绳索与构件水平面的夹角不宜小于60°,否则应采用吊架或经验算确定。( )