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【单选题】
化学与人类健康密切相关，下列做法正确的是A.
用福尔马林（甲醛的水溶液）保鲜鱼肉等食品
B.
在饼干中适量添加碳酸钙，补充人体所需的钙元素
C.
发霉的大米，也能食用
D.
保护水资源，禁止使用化肥、农药
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