在USCPA考试的冲刺阶段，通过做模拟习题，来检查自己在复习中是否有疏漏。
　　A patent, purchased in year 1 and being amortized over a 10-year life, was determined to be worthless in year 5. The write-off of the asset in year 5 is an example of which of the following principles?
　　A. Associating cause and effect.
　　B. Immediate recognition.
　　C. Systematic and rational allocation.
　　D. Objectivity.
　　Answer:B
　　B is corrent. Per SFAC 5, the principle of immediate recognition requires that items carried as assets in prior periods that are discovered to be impaired in value be charged to expense (e.g., a patent that is determined to be worthless).
　　A is incorrect, although associating cause and effect is a pervasive expense recognition principle. Per SFAC 5, the principle of immediate recognition requires that items carried as assets in prior periods that are discovered to be impaired in value be charged to expense (e.g., a patent that is determined to be worthless).
　　C is incorrect, although systematic and rational allocation is a pervasive expense recognition principle. Per SFAC 5, the principle of immediate recognition requires that items carried as assets in prior periods that are discovered to be impaired in value be charged to expense (e.g., a patent that is determined to be worthless).
　　D is incorrect because although objectivity is an underlying accounting principle, it is not a logical answer for this question.