[单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. It’s harmful for him to use his voice. B. He needs to see a doctor. C. He hasn’t been taking his medicine. D. It’s difficult to understand him when he whispers.
参考答案:A 答案解析:[听力原文] M: Sam’s voice sounds awful. I could barely hear him. I think he needs to take a few days
第20题: [单项选择]下列关于经济规模的概念,理解正确的是()。 A. 是指项目设定的在正常生产运营年份能达到的预期生产能力或供应服务能力 B. 是指在一定的技术经济条件下,项目投入产出比处于优化状态,资源和资金可以得到充分利用,并可获取较优经济效益的规模 C. 主要是指建设项目生产的主导产品的品种、规格、技术性能、生产能力以及同类产品不同规格、性能、生产能力的优化组合方案。 D. 指产品水平、档次、技术含量和主要服务对象 参考答案:B