向MgSO4和Al2(SO4)3的混合溶液中，逐滴加入NaOH溶液。下列图象中，能正

向MgSO₄和Al₂(SO₄)₃的混合溶液中，逐滴加入NaOH溶液。下列图象中，能正确表示上述反应的是（横坐标表示加入NaOH溶液的体积，纵坐标表示反应生成沉淀的质量）

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