听力原文:W: Can you tell me the least expensive way to get to California? M: If you go by bus, it's only $30. But if you go by train, it's almost twice that much. What does the man explain to the woman?
A.
The train is cheaper than the bus.
B.
The bus is cheaper than the train.
C.
There are two buses every day.
D.
The train is faster than the bus.
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【单选题】All wire rope used in shipboard cargo gear must be identified and described in a certificate. The certificate shall certify all of the following EXCEPT the ______.