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A．It has improved animal breeding skills ail over the world.B．It has helped relieve hunger in some developing countries.C．It has promoted international exchange of farming technology.D．It has bridged the gap between the rich and the poor in America.
A．It has improved animal breeding skills ail over the world.
B．It has helped relieve hunger in some developing countries.
C．It has promoted international exchange of farming technology.
D．It has bridged the gap between the rich and the poor in America.
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