第6题: [单项选择]What does the man mean A. The man had a word with John. B. John didn’t want to talk with him. C. John was doing his homework. 参考答案:C 答案解析:[听力原文] M: Excuse me. May I have a word with John W: Oh, sorry. He’s busy with his homework. 第7题: [单项选择]观察荧光时,若无特别说明,通常使用的紫外光波长是 A. 254nm B. 365nm C. 465nm D. 635nm E. 654nm 参考答案:B 答案解析:荧光分析常用的紫外光灯的波长为365nm,如果用短波则为254~265nm,且要加以说明,因两者的荧光现象不同。故答案选B。