单项选择题

A．A standard unit for measuring weight.
B．How to care for precious metals.
C．The value of precious metals.
D．Using the metric system.
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单项选择题
A．People enjoy shopping in them.B．People spend little time in them.C．People are more likely to buy something in them if time is limited.D．People spend too much time reading articles about quick Cures sold in drugstores.
A．People enjoy shopping in them.
B．People spend little time in them.
C．People are more likely to buy something in them if time is limited.
D．People spend too much time reading articles about quick Cures sold in drugstores.
单项选择题
A．15 points.B．30 points.C．45 points.D．75 points.
A．15 points.
B．30 points.
C．45 points.
D．75 points.
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