单项选择题

A．They were imported from European countries.
B．They migrated from distant colonies.
C．They were domesticated from local wild breeds.
D．They were the result of a careful breeding program.
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单项选择题
A．Excellent quality.B．Large productivity.C．Good flavor.D．Both A and B.
A．Excellent quality.
B．Large productivity.
C．Good flavor.
D．Both A and B.
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