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【单选题】
铁路货运业务包括托运、承运、发送、费用结算和( )等。A.
货物交付
B.
运单交接
C.
报关单交接
D.
车辆交接
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反馈参考答案：
举一反三
【简答题】UNIX 是一种( )式、分时、多用户的操作系统。
【单选题】What are the functions of PSAs?
A.
PSAs can automatically monitor life support systems, snapping photos, and taking overmonitoring tasks from failed sensors.
B.
They are capable of videoconferencing so that they offer a virtual presence of ground crows and scientists.
C.
They can go where no man has gone since the vehicles were first assembled.
D.
All of the above mentioned.
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