问题
单项选择题
关于ATP子系统，正确的描述是（）.
A.当行车速度超过防护值时产生紧急制动
B.测试装置属于ATP轨旁设备
C.ATP负责计算出安全停车点的速度----距离曲线，该停车点后行列车不得超过。
D.ATP可不能可进行列车开关门操作
答案
参考答案：C
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关于ATP子系统，正确的描述是（）.
A.当行车速度超过防护值时产生紧急制动
B.测试装置属于ATP轨旁设备
C.ATP负责计算出安全停车点的速度----距离曲线，该停车点后行列车不得超过。
D.ATP可不能可进行列车开关门操作
参考答案：C
| 根据句意，用方框中所给短语的适当形式填空。 | |
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| 1. A sign outside a building says " ". It is telling you not to enter the building. 2. , we only knew two people in London but we soon made some friends. 3. These advertisements are specifically __________ the young people. 4. We considered all the very carefully before deciding to buy a bigger house. 5. Several of his friends came : Ben, Carol and Mike, _____________ . |