Both properties occupy a region long known as the "lung of Haikou" for its green ______ an

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Both properties occupy a region long known as the "lung of Haikou" for its green ______ and fresh air.

A.vision

B.scene

C.sight

D.landscape

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗