单项选择题
A.stringB.offsetC.lengthD.encode
A.fs.mkdirB.fs.rmdirC.fs.readdir
A.basename(p[,ext])B.dirname(p)C.normalize(p)D.sep
A.fs.appendFile(file,data[,options],сallback)B.[fs.writeFileSync(file,data[,options])]C.fs.stat(path,callback)D.fs.writeFile(file,data[,options],callback)
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