题目

空气是一种宝贵资源，下列有关空气的说法正确的是 A . 工业上用液态空气分离出氧气是分解反应 B . 空气中氮气占空气质量分数的 C . 稀有气体化学性质稳定，可以作保护气 D . 浓度属于我国 环境空气质量标准 基本监控项目 答案：CM=MikeJ=JennyM：Hi, do you have a bed (76) a        for tonight?   J：Let me (77) c       . Which room would you (78) p       ? A single room or a double one?      M：I want a single room. What’s the (79) p       ?        J：Do you have a membership?M：No, I don’t.J：Then it’s 25 dollars. You can save 3 dollars if you have a membership.M：How can I get a membership?J：You can (80) a       for it. The application (81) f       is 32 dollars. Or if you stay in an International hotel for six nights, you’ll automatically get a membership card.M：I see. Thanks.J：Here’s your (82) k        and your sheets.                M：Oh yes, is there a kitchen here?J：Sure there is, it’s on the first floor. Don’t (83) h        to ask me if you have other questions.M：I (84) d        noise. Is my room near the street?    J：No, it is (85) p        quiet.