<p> 以下哪项可以在Node.js中复制文件？( )</p>
<p> <br/> var fs = require('fs'); <br/> fs.createReadStream('test.file').pipe(fs.createWriteStream('newFile.file'));</p>
<p> <br/> var fs = require('fs'); <br/> fs.createReadBuffer('test.file').pipe(fs.createWriteBuffer('newFile.file'));</p>
<p> <br/> var fs = require('file'); <br/> fs.createFileReader('test.file').pipe(fs.createFileWriter('newFile.file'));</p>
<p> <br/> var fs = require('fs'); <br/> fs.createReadBuffer('test.file').stream(fs.createWriteBuffer('newFile.file'));</p>
