40. What is the passage mainly about?
(A) The growth of cities in the United States in the early 1900's
(B) The development of the Southern California oil fields
(C) Factors contributing to the growth of Los Angeles
(D) Industry and city planning in Los Angeles

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統計: A(4), B(0), C(7), D(0), E(0) #803589

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#7354187
這題的正確答案為 (C) 促成洛杉磯增...
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