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【多选题】
有关影响沉淀完全的因素叙述正确的是 ( )A.
利用同离子效应，可使被测组分沉淀更完全
B.
盐效应的存在，可使被测组分沉淀完全
C.
配位效应的存在，将使被测离子沉淀不完全
D.
温度升高，会增加沉淀的溶解损失
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皮皮学刷刷变学霸
举一反三
【单选题】—What are you going to do? —I will buy a book________. [ ]
A.
to my sister
B.
for my sister
C.
of my sister
D.
at my sister
【单选题】Project Hond Start which was inaugurated in the United States in 1965 is a federally funded preschool for economically and culturally disadvantaged children.
A.
initiated
B.
celebrated
C.
installed
D.
proposed
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