题目内容：
一桶农药，加入一定量的水稀释后，浓度为15%；再加入同样多的水稀释，农药的浓度变为12%；若第三次再加入同样多的水，农药的浓度将变为多少?（ ）
参考答案：
答案解析：
单选题：一桶农药，加入一定量的水稀释后，浓度为15%；再加入同样多的水稀释，农药的浓度变为12%；若第三次再加入同样多的水，农药
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- 题目类型：单选题
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