单项选择题

A．In cold zones.
B．In hot zones.
C．In temperate zones.
D．Any climate.
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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.
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.
单项选择题
A．The poor.B．The unemployed.C．The old.D．The young.
A．The poor.
B．The unemployed.
C．The old.
D．The young.
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