43 According to the passage, what threatens the ecosystem of Yosemite National Park?
(A) The Merced River
(B) The visiting crowds
(C) The plunging waterfalls
(D) The soaring crags

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統計: A(11), B(65), C(17), D(9), E(0) #1258313

詳解 (共 1 筆)

#3196395
默塞德河(Merced River)鑿刻...
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