User-Agent: Googlebot
Disallow: /*.pps$
Disallow: /*.rar$
Disallow: /*.xls$
Disallow: /*.doc$
Allow: /

User-agent: Baiduspider
Disallow: .pps$
Disallow: .rar$
Disallow: .xls$
Disallow: .doc$
Allow: /