听力原文： Patrick Murphy about to receive a master' s degree in engineering, but he still hadn't found the kind of job he was looking for. He was considering the possibility of working as a sales representative for an engineering company, so he made an appointment to discuss the idea with Paula Duran' s friend Ray Palmer, who used to be a sales representative for the Western Mining and Manufacturing Company. When Patrick got to Ray' s office for their appointment, Ray shook hands and greeted him warmly. 'So you think you might be interested in sales,' said Ray. 'Yes,' replied Patrick. 'I thought you' d be able to tell me what the work' s really like. ' Ray thought for a moment, 'Well, like any job, it has its good points and its bad points. One of the best things about it, though, is the independence. As a sales representative you can set your own schedule and do things your own way. ' 'That sounds good,' commented Patrick. 'Yeah, it' s nothing like a desk job. There' s a lot of variety in the work—getting out, seeing customers. That' s the positive side. Of course, there are some disadvantages too. Probably the worst thing is that you' re away from home a lot and you get pretty tired of airports, planes and hotels. ' Patrick nodded thoughtfully. 'I see what you mean. Also, I think there' d be a lot of pressure involved. ' 'There is,' said Ray. 'If you do well one month, they expect you to do better the next. It never stops. '... What degree was Patrick about to receive?