单项选择题 What are the limitations of the internal rate of return? A、The internal rate of return may not exist. B、There may be multiple solutions to the calculation equation for the internal rate of return. C、The internal rate of return cannot be used for investment decision analysis of mutually exclusive investment projects. D、All of the above

单项选择题 对于一个链串s，查找第i个元素的算法的时间复杂度为（     ）。 A. O(1) B. O(n) C. O(n^2) D. 以上都不对

单项选择题 Perth operates a process costing system. The process is expected to lose 25% of input and this can be sold for 52,500 .Direct labour, $9,625 for the period. There is no opening or closing work in progress in the period. Actual output was 2,800 kg. What is the valuation of the output?