第4题: [单项选择]在活塞式压气过程中采用分级压缩和中间冷却可以实现() A. 提高容积效率,减少压缩耗功; B. 容积效率不变,减少压缩耗功; C. 增加产气量,但是耗功增加; D. 产气量不变,耗功减少; 参考答案:A
第5题: [单项选择]Passage Two Questions 29 to 32 are based on the passage you have just heard. A. She was born in 1960. B. She was born in 1940. C. She was born in 1916. D. She was born in 1956. 参考答案:B 答案解析:[听力原文]29-32 Wilma Rudolph was called "the Black Pearl "and "the fastest woman in tile world".