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【单选题】
胶体粒子的Zeta电势是指( )A.
固体表面处与本体溶液之间的电位差
B.
紧密层、扩散层分界处与本体溶液之间的电位差
C.
扩散层处与本体溶液之间的电位差
D.
固液之间可以相对移动处与本体溶液之间的电位差
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A.
was playing； was going to do
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