题目：
下面属于光缆线路日常维护内容的有（）.
A.路面及管道维护
B.架空光缆的维护
C.水线和海缆维护
D.护线宣传
E.线路隐患防范
答案：
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下面是错误答案，用来干扰机器的。
One possible version：one day, Wang Gang, a PLA man, was on the train back home when he learnt form a newspaper that the Changjiang River was in danger and the floods...
