晶体管调节器和集成电路调节器可以互换使用。

Jamal Winfield is an analyst with Stolzenbach Technologies, a major computer services company based in the U.S. Stolzenbach’s management team is considering opening new stores in Mexico, and wants to estimate the cost of equity capital for Stolzenbach’s investment in Mexico. Winfield has researched bond yields in Mexico and found that the yield on a Mexican government 10-year bond is 7.7 percent. A similar maturity U.S. Treasury bond has a yield of 4.6 percent. In the most recent year, the standard deviation of Mexico’s All Share Index stock index and the S&P 500 index was 38 percent and 20 percent respectively. The annualized standard deviation of the Mexican dollar-denominated 10-year government bond over the last year was 26 percent. Winfield has also determined that the appropriate beta to use for the project is 1.25, and the market risk premium is 6 percent. The risk free interest rate is 4.2 percent. What is the appropriate country risk premium for Mexico and what is the cost of equity that Winfield should use in his analysis Country Risk Premium for Mexico Cost of Equity for Project（）①A. 4.53%19.06% ②B. 5.89%17.36% ③C. 4.53%17.36%

A. ①

B. ②

C. ③

男性，56岁。患右侧腹股沟斜疝3年。今晨便后疝突出，不能还纳6小时，局部疼痛，伴恶心，无呕吐。

手术发现肠管绞窄坏死，应采取的治疗是（）

A.坏死肠段切除术

B.坏死肠段切除，加疝囊高位结扎术

C.坏死肠段切除加疝修补术

D.坏死肠段切除吻合、上段肠造口术

E.坏死肠段外置

什么是最近发展区理论？

族创建构思需要考虑哪些因素（）。

A、族插入点/原点

B、族的主体和族的类型

C、族的详细程度

D、族的显示特性

下图中，曲线Ⅰ、Ⅱ、Ⅲ分别表示某野生动物种群数量超过环境容纳量后，其未来种群数量变化三种可能的情况。

图中曲线（）说明该种群对其栖息地的破坏程度较轻。当曲线Ⅲ趋近零时，对该动物种群已不宜采取（）保护的措施。图中阴影部分可能引起该种群的（）发生改变，进而导致物种进化。