2012年11月中旬，某旅行社总经理召集该社的市场、销售、计调、财务的负责人开会，研究下一年度的经营计划，并要求他们提出相应的经营法案。2012年12月初，该社相关部门向旅行社总经理提出了5套经营方案。该社总经理再次召开各部门负责人开会，研究这些方案，并对各个方案分别做了敏感度分析，以评价各个经营方案的风险，并选取最优的经营方案。
如果2013年旅游市场形势看好与形势看差的概率相等，在5套经营方案中，期望效益超过250万元的是（）.
A．A经营方案
B．B经营方案
C．C经营方案
D．D经营方案
E．E经营方案
参考答案：C, E
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| Agatha Christic would never forget the night when she met a robber (抢劫者) many years ago. That evening,she went to a birthday party which 1 until two o'clock in the morning. Agatha walked in the 2 street alone. Suddenly from the back of a dark 3 a tall man with a sharp knife in his right hand ran out at her. "Good 4 , lady," the man said in a low voice. "I don't think you wish to 5 here!" "What do you want?" "Your earrings. Take them off!" Agatha suddenly had a 6 idea. She tried to cover her necklace with the collar (衣领) of her overcoat while she used 7 hand to take off both of her earrings and then quickly 8 them on the ground. "Take them and let me go," she said. The robber thought that the girl didn't like the earrings at all, only trying to 9 the necklace. It would cost 10 , so he said, "Give me your necklace." "Oh, sir. It doesn't 11 much. Please let me wear it." "I'm not that 12 . Quick!" With shaking 13 Agatha took off her necklace. As soon as the robber left, she picked up her earrings and ran as 14 as she could to one of her friends. The earrings cost 480 pounds and the necklace the robber had taken away cost 15 six pounds. | ||||
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