【单选题】
安全线向车挡方向不应采用下坡道，其有效长度一般≥___。[921000000]
A. 30m
B. 40m
C. 50m
D. 60m
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答案
C
解析
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【单选题】
装有转换锁闭器、电动、电空、电液转辙机的道岔，当第一连接杆处(分动外锁闭道岔为锁闭杆处)的尖轨与基本轨间、心轨与翼轨间有___及其以上水平间隙时，不能锁闭或开放信号机。[921000000]
A. 2mm
B. 3mm
C. 4mm
D. 5mm
【单选题】
在地形、地物影响视线的地方，进站、通过、接近、预告、遮断信号机的显示距离，在最坏的条件下应≥___。[923000000]
A. 50m
B. 100m
C. 200m
D. 400m
【单选题】
进站信号机应设在距进站最外方道岔尖轨尖端(顺向为警冲标)≥50m的地点，如因调车作业或制动距离的需要，一般不超过___。[921000000]
A. 80m
B. 100m
C. 200m
D. 400m
【单选题】
列车运行速度不超过120km/h的区段，预告信号机与其主体信号机的安装距离应≥___。[923000000]
A. 200m
B. 400m
C. 800m
D. 1000m
【单选题】
在列车运行速度不超过120km/h的区段，当两架信号机间的距离小于___时，前架信号机的显示，必须完全重复后架信号机的显示。[922000000]
A. 200m
B. 400m
C. 800m
D. 1000m
【单选题】
在列车运行速度超过120km/h的区段，两架有联系的信号机间的距离___列车规定速度级差的制动距离时，应采取必要的降级或重复显示措施。[933000000]
A. 大于
B. 小于
C. 等于
D. 大于等于
【单选题】
信号传输线路，在最大弛度时，架空线条最低点至地面、轨面的一般距离应满足：在与铁路交叉地点，距钢轨顶面≥___。[922000000]
A. 2000mm
B. 2500mm
C. 3000mm
D. 7000mm
【单选题】
地下光缆和电缆线路与树木平行的距离应满足：在市内≥750mm，在市区外≥___。[921000000]
A. 1000mm
B. 1500mm
C. 2000mm
D. 2500mm
【单选题】
架空线路附近的树枝与线路的距离应满足：在市内≥1000mm，在市区外≥___。[911000000]
A. 1000mm
B. 1500mm
C. 2000mm
D. 2500mm
【单选题】
铁路信息系统网络按应用分为外部服务网、内部服务网和安全生产网，采用纵深的综合防御体系确保网络安全，安全生产网骨干设备应采取___，禁止安全生产网直接与互联网连接。[913000000]
A. 冗余配置
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D. 备份和设备配置
【单选题】
各站均须装设基本闭塞设备，行车基本闭塞法采用下列___等三种。[921000000]
A. 电话闭塞、人工闭塞、设备闭塞
B. 通讯闭塞、信号闭塞、设备闭塞
C. 电话闭塞、信号闭塞、自动闭塞
D. 自动闭塞、半自动闭塞、自动站间闭塞
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设有双向闭塞设备的自动闭塞区间，遇轨道电路发生故障等情况，需使用总辅助按钮改变闭塞方向时，车站值班员应在___内登记。[923000000]
A. 工作日志
B. 交接班簿
C. 安全指导簿
D. 行车设备检查登记簿
【单选题】
在半自动闭塞区间，遇特殊情况时，车站值班员确认列车整列到达后，办理人工复原，并在___内登记。[923000000]
A. 工作日志
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【单选题】
铁路信号分为视觉信号和听觉信号，其中听觉信号包括___。[922000000]
A. 号角、机车、轨道车发出的音响
B. 号角、口笛、响墩发出的音响
C. 机车、轨道车、的鸣笛声
D. 号角、口笛、响墩发出的音响和机车、轨道车的鸣笛声
【单选题】
视觉信号分为昼间、夜间及昼夜间通用信号，在昼间遇降雾、暴风雨雪以及其他情况，致使停车信号现实距离不足___时，注意或减速信号现实距离不足400m，调车信号及调车手信号现实距离不足200m时，应使用夜间信号。[931000000]
A. 700m
B. 800m
C. 900m
D. 1000m
【单选题】
进站、出站、进路信号机及线路所的通过信号机，均以显示___为定位，自动闭塞区段的通过信号机，以显示进行信号为定位，接近、预告信号机及通过臂板，以显示进行信号为定位。[913000000]
A. 停车信号
B. 进行信号
C. 注意信号
D. 警示信号
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进站、出站、进路和通过信号机的灯光熄灭、显示不明或显示不正确时，均视为___，接近信号机的灯光熄灭、显示不明或显示不正确时，均视为进站信号机为关闭状态。[923000000]
A. 停车信号
B. 进行信号
C. 注意信号
D. 警示信号
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在新建铁路线上，新设尚未开始使用的信号机(进站信号机暂用作防护车站时除外)，可撤下臂板或将色灯机构向线路外侧扭转___，并熄灭灯光，作为无效。[922000000]
A. 30°
B. 60°
C. 90°
D. 180°
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进站及接车进路色灯信号机的引导信号显示一个红色灯光及一个白色灯光——准许列车在该信号机前方不停车，以不超过___速度进站或通过接车进路，并须准备随时停车。[911000000]
A. 5km/h
B. 10km/h
C. 15km/h
D. 20km/h
【单选题】
设有分歧道岔的线路所，当列车经过分歧道岔侧向运动时，色灯信号机应显示两个黄色灯光；当分歧道岔为18号及以上道岔时，显示___。[922000000]
A. 一个绿色灯光
B. 一个黄色灯光
C. 一个黄色闪光
D. 一个黄色闪光和一个黄色灯光
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有人看守道口应装设遮断信号机，在有人看守的桥隧建筑物及可能危及行车安全的塌方落石地点，根据需要装设遮断信号机，该信号机距防护地点不得小于___。[921000000]
A. 35m
B. 40m
C. 45m
D. 50m
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出站信号机有两个及以上的运行方向，而信号显示不能分别表示进路方向时，应在信号机上装设___。[932000000]
A. 表示灯
B. 表示器
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D. 进路表示灯
【单选题】
发车指示信号或发车信号辨认困难，而中转信号又延长站停时间的车站，应在便于司机瞭望的地点装设___。[922000000]
A. 表示灯
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在作业繁忙的调车场上，因受地形、地物影响，调车机车司机看不清调车指挥人的手信号时，应设___。[922000000]
A. 表示灯
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( ) 27. What does the prince do after the fox tells him a secret?
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【单选题】
( ) 30. When was the importance of touching all the bases shown?
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( ) 32. What does the expression “to touch all bases” mean?
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( ) 35. The World Wetlands Day is on _______．
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【单选题】
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【单选题】
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【单选题】
( ) 38. From a dam, people can use the water for ___________.
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【单选题】
( ) 39. The water in the river is polluted because of _____________.
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【单选题】
( ) 40. The best title of the passage is ___________.
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【单选题】
1.—Hello! This is Henry Speaking．I’d like to speak to your father．
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2. — It’s difficult for the village children to cross the river for school．
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【单选题】
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【单选题】
5. There are three English-books on the shelf, but ______ of them is mine.
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【单选题】
6. When the parents arrived at the hall, the students _______ their projects.
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【单选题】
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9. — Can he jump high?
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
15. — It’s difficult for the village children to cross the river for school.
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【单选题】
18. — Did you see a girl in yellow pass by just now?
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【单选题】
19.In fact, my parents are not only kind to me, but also strict ________ me.
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【单选题】
20. The boy_____ a yellow sweater can_____ himself now．
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【单选题】
21. —Jack, I haven’t seen your brother for a long time．
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【单选题】
22. The meat with eggs tastes ______. Would you like some more?
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【单选题】
23. — Look! The man standing at the gate ______ be our headmaster．
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A. A
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【单选题】
24. The Japanese government must do everything ________ polluted water from running into rivers, lakes, seas and oceans．
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B. B
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【单选题】
25. —Hi, Jack．Did you go to Jim’s birthday party?
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A. didn’t invite B. am not invited C. wasn’t invited D. hadn’t invited
A. A
B. B
C. C
D. D
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
A. A
B. B
C. C
D. D
