第17题: [单项选择]It is important for specialists to be able to travel because ______. A. there are so many people working in similar fields B. there is a lot of social unrest at universities C. their follow experts are scattered round the world D. their laboratories are in remote places 参考答案:A 答案解析:事实细节题。根据第三段中的内容,These people would work in some isolation if they were not able to keep in touch wit