单项选择题

Now many manufacturers build their business reputations by enclosing ______ in the new products in case of damage in shipment or by incorrect operation.

A．categories
B．accessories
C．analogies
D．observatories
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单项选择题
As the ______ to the general strike the management promised to increase the workers' payment.
A．succession
B．concession
C．permission
D．pledge
单项选择题
A ship is in great danger. Please point out the ship's exact ______ .
A．locality
B．hazard
C．loss
D．district
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