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A．because they cleaned the ship with lethal liquid.B．as a result of loading poisonous ores.C．as a result of too much exposure to the poisonous gas.D．because of the leakage of lethal gas at the port.
A．because they cleaned the ship with lethal liquid.
B．as a result of loading poisonous ores.
C．as a result of too much exposure to the poisonous gas.
D．because of the leakage of lethal gas at the port.
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