res=["C:\\Users\\sqian\\Desktop\\invoice\\**样式1-1.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式1-2.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-1.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-10.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-11.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-12.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-13.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-14.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-2.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-3.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-4.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-5.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-6.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-7.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-8.pdf","C:\\Users\\sqian\\Desktop\\invoice\\**样式2-9.pdf"]这是我的一个数组，为什么不能作为循环命令的循环体，取出数组中的每个
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