當地下水中______水質指標上升，代表可能有海水入侵的現象發生。(A) pH 値(B) 總無機碳量(C) 溶氧量(D) 導電度値

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7. 當地下水中______水質指標上升，代表可能有海水入侵的現象發生。
(A) pH 値
(B) 總無機碳量
(C) 溶氧量
(D) 導電度値

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