单项选择题：有A、B、C、D外表一样、重量不同的四个小球。已知：A+B=C+D；A+D>B+C；A+C<B。则这四个球由重到轻的排列

题目内容：

有A、B、C、D外表一样、重量不同的四个小球。已知：A+B=C+D；A+D>B+C；A+C<B。则这四个球由重到轻的排列顺序是( )。
单项选择题
A、D>B>A>C
B、B>C>D>A
C、D>B>C>A
D、B>A>D>C

参考答案：

答案解析：

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