列车运行速度超过120km/h的区段，应设置两段接近区段，在第一接近区段和第二接近区段的分界处，设（）信号机。
参考答案：接近
溃疡型肠结核主要消化道症状是
A．呕吐
B．便秘
C．消瘦
D．腹部肿块
E．腹痛、腹泻、大便呈糊状
I will thank Mary for her having offered to ________the baby while I went out.
A．have an eye for
B．keep an eye out for
C．keep an eye on
D．cast her eye over
