The airplane had a good _____ of newspapers, magazines, television programs, food and drinks. The meal even included a serving of Hagen-Dazs ice cream.

A．offer

B．number

C．supply

D．amount

绩效评估是完成组织目标最重要的条件之一，但很多组织绩效评估仅流于形式，你认为造成企业绩效评估失败的可能原因有哪些？