挑战习题
1/5单选题
难度:

1.用聚光手电筒照射下列分散系,可观察到丁达尔效应的是
A KOH溶液
B Fe(OH)3胶体
C 盐酸
D NaNO3溶液
提示1:
5LiB6L6+5bCU546w6LGh5piv6IO25L2T54m55pyJ55qE546w6LGh44CC
正确答案:Qg==
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