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问题 单项选择题 A1/A2型题

关节结核早期X线表现的主要特征是（）。

A.以骨质破坏为主

B.以骨质增生为主

C.骨质增生与破坏并存

D.局限性脱钙

E.关节间隙消失

答案

参考答案：A

单项选择题

A firm has $100 in equity and $ 300 in debt. The firm recently issued bonds at the market required rate of 9 percent. The firm’s beta is 1.125, the risk-free rate is 6 percent, and the expected return in the market is 14 percent. Assume the firm is at their optimal capital structure and the firm’s tax rate is 40 percent. What is the firm’s weighted average cost of capital (WACC)（）

A. 7.8%.

B. 5.4%.

C. 8.6%.
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单项选择题

新投入的分接开关，在投运后（）年或切换5000次后，应将切换开关吊出检查。

A.1一2

B.2一3

C.3一4

D.4一5
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