• It will almost certainly be a SINGLE A4 page
• It must have no language or punctuation errors.
• If in a foreign language, it MUST be proofread by a competent native-speaker.
• It must be clear, logical, unfussy and consistent in layout.
• It must have no gaps in the timeline.
• Full sentences are not needed except in an introductory statement.
• It should quote referees if possible.
• With a PHOTO? Opinions differ. I personally would put one, but some advise not.
• Some originality would not go amiss: something to make it stand out from the others - but nothing too zany .....
• Most professionals advice that you neeed a PERSONAL STATEMENT giving a brief
  self-profile and stating your career objectives, Study the examples.

The bottom line? If it doesn't conform to these guidelines there is
a good chance it will be thrown straight in the bin without being read.