第25题: [单项选择]The price drop of crude oil is beneficial in that it [A] helps to revitalize the world economy. [B] promotes oil export to other nations. [C] helps to push up the regional economy. [D] provides an opportunity to the oil exporters. 参考答案:A 答案解析:[听力原文] 7-8 The decline in oil priees triggered last week by a row between major world crude p
第27题: [单项选择]在负压条件下进行干燥的方法（） A. 蒸发 B. 干燥 C. 减压干燥 D. 常压干燥 E. 浸出 参考答案:C 答案解析:蒸发指用加热的方法使溶液中部分溶剂气化并除去，从而提高溶液的浓度的工艺；干燥指利用热能使湿物料中的湿分气化除去，从而获得干燥物品的工艺操作；减压干燥是在负压条件下进行干燥的方法；常压干燥是在一个大气压
