当光束通过下列分散系:①烟雾 ②稀硫酸 ③蒸馏水 ④鸡蛋清溶液

当光束通过下列分散系:①烟雾 ②稀硫酸 ③蒸馏水 ④鸡蛋清溶液,能观察到有丁达尔现象的是(  )

A.①②           B.②③           C.①④           D.②④

答案

C

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