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木工机械只准使用单向开关，闸刀开关是单向开关，可以使用。()

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Under the Carriage of Goods by Sea Act of 1936，a vessel will be liable for damage to cargo

An act of war
B. Lack of ventilation in transit
C. Perils of the sea
D. An error in navigation

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Where are self-closing doors required on a ship ________．

A. In the galley
B. In each stair tower
C. To each sleeping room
D. To the engine room

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The vessel shall be employed in such lawful trades between safe ports and places within Northern America as the ______ or their agents shall direct．

A. Charterers
B. Cargo owners
C. Owners
D. The merchants

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Neither the carrier nor the ship be responsible for loss or damage arising or resulting from following causes except ______．

Act of public enemies
B. Arrest or restraint of princes，rulers or people，or seizure under legal process
C. Quarantine restrictions
D. any personal misconduct with or without carrier's privity

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