Before checking in the baggage, it’s best for the passenger to( ).

多选题

Before checking in the baggage, it’s best for the passenger to( ).

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多选题

From a small point of view, what aspects should be paid attention to in translation checking？()

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多选题

In order to improve checking speed，passengers in tourist group，please( ) according to the list of plane tickets．

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单选题

( )is the process of checking an individual to verify identity,intentions, authority to be in a restricted area.

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单选题

Students should _______ their hands before asking questions in class.

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