题目内容
执行成功时返回值为0的函数是（）。
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Modern manufacture keeps advancing with the fast popularization of personal computers and the Internet .
CAD software should be certified to run on any graphics （驱动）of operating systems .
The former is used to carry the heavy computational load for solid modeling and storage
while the I / O device is made to input programs into or from the CNC unit .
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