第9题: [单项选择]购买者通过( )来影响行业中现有企业的盈利能力。 A. 提高投入要素价格与降低单位价值质量的能力 B. 压价与要求提供较高的产品或服务质量的能力 C. 提高投入要素价格与要求提供较高的产品或服务质量的能力 D. 压价与降低单位价值质量的能力 参考答案:B 答案解析:如果买方拥有讨价还价能力，则买方一定会利用它。这会使供方减少利润，其结果是影响收益率。购买者主要通过压价与要求提供较高的产品或服务质量的能力，来影响行业中现有企业的盈利能力。所以，本题的正确答案为B。
第17题: [简答题]大学生可以打工吗？ 参考答案:
Part-time jobs are now the norm for China’s students. As the picture shows, a part-time tutor advertises her service oh a street in X city. I think she seems to hold that part-time jobs are no longer only for the students from poor families and that they have become part of normal college life.
People differ in their opinions on part-time jobs. Some believe that college students take part-time jobs because they are financially stressed, In. their eyes, part-time jobs help students support themselves, alleviating the burden of their parents. Others maintain that part-time jobs have become fashionable in Beijing’s universities and the trend may well go national. This reflects a new social phenomenon that college students are eager to go out of their campus to experience what work will bring to them. Still others assert that part-time jobs will interfere with students’ normal academic work. According to them, the first thing students should do is to do well at college.
In my opinion, I’m firmly standing on the side of those who are inclined to take part-time jobs. I believe that limited part-time work gives students a good opportunity to apply their theoretical knowledge to social practice.
