请帮我看下下面这个robots.txt代码可不可用．我是要全部允许的．
# robots.txt generated at http://www.robotstxt.com.cn
User-agent: Googlebot
Disallow:
User-agent: YodaoBot
Disallow:
User-agent: googlebot-image
Disallow:
User-agent: googlebot-mobile
Disallow:
User-agent: MSNBot
Disallow:
User-agent: Slurp
Disallow:
User-agent: Teoma
Disallow:
User-agent: twiceler
Disallow:
User-agent: Gigabot
Disallow:
User-agent: Scrubby
Disallow:
User-agent: Robozilla
Disallow:
User-agent: Nutch
Disallow:
User-agent: ia_archiver
Disallow:
User-agent: baiduspider
Disallow:
User-agent: naverbot
Disallow:
User-agent: yeti
Disallow:
User-agent: yahoo-mmcrawler
Disallow:
User-agent: psbot
Disallow:
User-agent: asterias
Disallow:
User-agent: yahoo-blogs/v3.9
Disallow:
User-agent: *
Disallow:
Disallow: /cgi-bin/