题目

阅读理解     Mr Jackson is having a meeting. He looks at the clock on the wall. It is 7:45. “The last bus left fifteen minutes ago,” he thinks. “I’ll have to stay in a hotel tonight.” Mr Jackson always drives home after work. He lives outside the city. There is something wrong with his car, so today he has to take a bus to his office. The meeting is over. When he goes out of the warm office, it begins to snow. He wants to have some warm food and soup first. Most restaurants are full of people and he has to go into a small one. The waiter shows(出示) him the menu(菜7．函数f（x）=2ex（x＜1）的反函数f-1（x）=ln$\frac{x}{2}$，x∈（0，2e）．