第23题: [单项选择]把蒸汽冷凝成液体需要使用()。 A. 锅炉 B. 换热器 C. 萃取塔 D. 搅拌器 参考答案:B
第24题: [单项选择]A. The bicycle is being repaired. B. The bicycle is new. C. She lent the bicycle to a friend. D. The bicycle is parked outside. 参考答案:A 答案解析:[听力原文] M: Hi, I see you’re walking. Where’s your bicycle today W: Oh, I bent the wheel yester