The surface of which metal is covered with a thin layer of oxide that helps protect it from corrosion by air?

If a physician repeats a basic procedure performed by another physician, the modifier -77 should be used

Indicate whether this statement is true or false.

A great deal is learned from mistakes. If mistakes are not tolerated and go unreported, they are bound to be repeated. In a blameless culture, bringing mistakes to the forefront affords the best opportunity to find the root cause. This type of work environment is known as:

A) ?nonpunitive B) unpunitive C) punitive D) blameless