影响物品老化的（）是物品本身的组成结构存在着易于老化的弱点。A、外在因素B、内在因素

The estimated annual after-tax cash flows of a proposed investment are shown below: Year 1: $10000 Year 2: $15000 Year 3: $18000 After-tax cash flow from sale of investment at the end of year 3 is $120000 The initial cost of the investment is $100000, and the required rate of return is 12 percent. The net present value (NPV) of the project is closest to:（）

A. $63000.

B. $66301.

C. $19113.

-- I’m sorry we ________ all the educational CD-ROM. Can you come next week?

-- Please call me as soon as the latest one _________.

A．have sold well, comes out

B．have sold out, comes out

C．have sold well, is come out

D．have sold out, is come out

建设项目分为（）、（）、（）、（）、（）。

分型面的形状有平面、曲面、斜面、（）。

患者，男，22岁。外感风寒，症见恶寒发热，不渴，无汗，身体疼重，胸痞，干呕，咳喘，脉浮，与麻黄配伍治疗内停水饮，应首选（）

A.杏仁

B.细辛

C.桂枝

D.香薷

E.甘草