38.The author states that Lewis and Clark studied all of the following characteristics of the explored territories EXCEPT
(A) mineral deposits
(B) the weather
(C) animal life
(D) native vegetation
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統計: A(0), B(1), C(0), D(1), E(0) #802776
統計: A(0), B(1), C(0), D(1), E(0) #802776