单项选择题

A．Instructions that come with a product.
B．The quantity of a product.
C．The quality of a product.
D．Warranties that cover a product.
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单项选择题
A．Press the process key.B．Insert his card.C．Memorize his personal number.D．Insert some coins.
A．Press the "process" key.
B．Insert his card.
C．Memorize his personal number.
D．Insert some coins.
单项选择题
Big dogs and little dogs, weak dogs and strong dogs, gentle dogs and fierce dogs, have been proceeding from different original stocks.
A．Y
B．N
C．NG
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