试题与答案

有人认为,当非稳态导热过程经历时间很长时,采用图3-7记算所得的结果是错误的.理由是

题型:问答题 论述题

题目:

有人认为,当非稳态导热过程经历时间很长时,采用图3-7记算所得的结果是错误的.理由是:这个图表明,物体中各点的过余温度的比值与几何位置及Bi有关,而与时间无关.但当时间趋于无限大时,物体中各点的温度应趋近流体温度,所以两者是有矛盾的。你是否同意这种看法,说明你的理由。

答案:

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Answering an essay question on a midterm examination, a finance student writes these two statements: Statement 1: The value of a fixed income security is the sum of the present values of all its expected future coupon payments. Statement 2: The steps in the bond valuation process are to estimate the bond’s cash flows, determine the appropriate discount rate, and calculate the present value of the expected cash flows. Should the instructor mark these statements correct or incorrect Statement 1 Statement 2() ①A. CorrectCorrect ②B. CorrectIncorrect ③C. Incorrect Correct

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