某参观团根据下列条件从A，B，C，D，E这5个地方中选定参观地点：①若去A地，则也必须去B地；②B，C两地中至多去一地；③D，E两地中至少去一地；④C，D两地都去或者都不去；⑤若去E地，一定要去A，D两地．那么参观团所去的地点是哪些？ ．
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= 2.5+
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= 2.5×40= 
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×0= 5.2÷0.125÷8=
= 5.6÷0.08= 
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= 1.25÷（10%÷10）=直接写得数．
256﹣198= 34.6+15.4= 1300﹣497= 0.81+15.3= 6.3÷10%=
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