钢筋最主要的性能是( )。A．抗拉性能 B．冷弯性能 C．冲击韧性 D．硬度

列举日常生活中利用红外线、紫外线工作的器具各一例：______、______．

下列河流注入北冰洋的是[     ]

A．长江

B．印度河

C．叶尼塞河

B．湄公河

上消化道出血的特征性表现是（）

A.贫血

B.发热

C.呕血与黑粪

D.氮质血症

E.失血性周围循环衰竭

根据土壤水分所受吸力的大小，把土壤主要水分分为（）三种类型。

Project X has an internal rate of return (IRR) of 14%. Project Y has an IRR of 17%. Both projects have simple cash flows (all positive after the initial one). Which of the following statements is most likely correct If the required rate of return is:（）

A. 14%, the net present value (NPV) of Project Y will exceed the NPV of project X.

B. less than 17%, Project Y will always have a shorter payback than Project X.

C. greater than 17%, Project Y will always have a shorter payback than Project X.