13 What is the main idea of the passage?
(A) Tourism motivates the authority to grow more mangroves.
(B) Tourism has a pernicious effect upon our ecosystems.
(C) Tourism can raise our awareness of the importance of environmental protection.
(D) Tourism makes transportation easier than before.
詳解 (共 1 筆)
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這段經文的主旨是什麼？（A）旅遊業激勵權...
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