17.According to the passage , the national and state governments did all of the following EXCEPT
(A)build roads
(B)import new plant varieties
(C)give farmers money for their crops
(D)develop policies that helped farmers export their products
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統計: A(2), B(0), C(4), D(0), E(0) #801890
統計: A(2), B(0), C(4), D(0), E(0) #801890