User-agent: Mediapartners-Google* 
Disallow: /access_db
Disallow: /images
Disallow: /numbers
Disallow: /sitelock
Disallow: /thumbnails
Disallow: /work

User-agent: *
Disallow: /access_db
Disallow: /images
Disallow: /numbers
Disallow: /sitelock
Disallow: /thumbnails
Disallow: /work