Check the escape route and report.—The escape route on port side is ___ yet. A. not clean B. not available C. not blocked D. not clear

单选题

Check the escape route and report.—The escape route on port side is ___ yet.A. not clean B. not available C. not blocked D. not clear

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单选题

The staff can check the passengers’ baggage on the( ).

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多选题

The security check is carried out for( ).

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单选题

Schedule the check of the tires at regular intervals

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单选题

In the oil purifier, the interface move outside the top disc, the oil will escape through______

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