请解释模拟电话用户话七个功能BORSCHT中各个字母的含义。
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You are approaching a vertical lift bridge.You know the span is fully open when（）.
A. Three white lights in a vertical line are lit
B. A red light starts to flash at about 60 times a minute
C. A yellow light is illuminated on the bridge pier
D. There is a range of green lights under the lift spa
Java文件与Bean所定义的类名可以不同，但一定要注意区分字母的大小写。
A. 正确
B. 错误
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