文件名称:aa
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有两个数（字数据）DATA1和DATA2，把两数之和放在DATA3中，两数之差放在DATA4中。-There are two numbers (word data) DATA1 and DATA2, the two numbers on the DATA3, two in the difference between the number on the DATA4.
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四个实验
........\四个实验
........\........\新建文件夹 (3)
........\........\..............\1.txt
........\........\..............\1.zip
........\........\..............\2.txt
........\........\..............\3.txt
........\........\..............\4.txt
........\四个实验
........\........\新建文件夹 (3)
........\........\..............\1.txt
........\........\..............\1.zip
........\........\..............\2.txt
........\........\..............\3.txt
........\........\..............\4.txt