第20题: [单项选择]某企业投资一个新项目，根掂预测资料测算的经营期望收益率为9.84%，标准差为4.92%，当前的无风险报酬率为4%；经专业机构评估确定的该项目的风险报酬系数为0.3。则该企业投资此项目预计能达到的投资报酬率为( )。 A. 9.84% B. 13.84% C. 18.76% D. 19% 参考答案:D 答案解析:[解析] 标准离差率(V)=标准差/期望值 =4.92%/9.84% =0.5 投资必要报酬率=无风险报酬率+风险报酬率
第21题: [单项选择]Passage One Questions 26 to 28 are bused on the passage you have just heard. A. He didn’t go to college. B. He benefited a lot from successful personal life. C. He was in good health. D. He was awarded the Nobel Prize in 1945. 参考答案:A 答案解析:[听力原文] 26-28 Ernest Hemingway was one of the great American writers of the twentieth century.
第22题: [单项选择]患者，男性，68岁，因食欲缺乏、消瘦3个月，发热、咳嗽2周入院。胸部X线片示：左侧胸膜肥厚、肋膈角消失、左胸壁小结节影。于CT引导下行左胸壁肿物穿刺活检术，病理报告恶性肿瘤、间皮瘤可能性大。免疫组化有助于诊断的标志物是（） A. S-100 B. Vimentin C. laminin D. calretinin E. CK 参考答案:D 答案解析:S-100是胶质细胞肿瘤标志；Vimenfin为间叶组织标志物；laminin为基底膜标志；CK为上皮性标志物；calretinin为间皮细胞肿瘤标志，因此选择D。
