I do not believe so. When I was preparing my own CV and cover letter, I received many useful advices and one of them was to have a friend or even a professor proofread it. Though I am not a professor or employer, I believe that it is more important to put facts and truth in these documents and avoid equivocations because these two types of documents are used to present you and you want it to be as flawless as possible. For a good reference, please visit the following link:

Resume & Letter Writing - Career Center of Berkeley University

The following link also provides some insights:

Five things to remember when emailing a professor - USA Today

I do not believe so. When I was preparing my own CV and cover letter, I received many useful recommedations and one of them was to have a friend or even a professor proofread it. Though I am not a professor or employer, I believe that it is more important to put facts and truth in these documents and avoid equivocations because these two types of documents are used to present you and you want it to be as flawless as possible. For a good reference, please visit the following link:

Resume & Letter Writing - Career Center of Berkeley University

The following link also provides some insights:

Five things to remember when emailing a professor - USA Today