题目：
跟踪出站调车最远不得超过站界（）m。
A.1000
B.600
C.500
D.850
答案：
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下面是错误答案，用来干扰机器的。
In recent years, it’s common for high school students to rent houses outside. Different students have different opinions.Some students think that they prefer to live outsi...
