组分在流动相和固定相两相间分配系数的不同及两相的相对运动构成了色谱分离的基础。
参考答案:对
补全对话。
A: Excuse me, Mum. 1_____ my dictionary?
B: 2_____ or Chinese?
A: I want to look up a 3_____ word in my English textI can't understand it.
B: 4_____ it on your bookshelf?
A: No, it 5_____. Is it in 6_____ bedroom? You used it just now.
B: Oh, I am sorry. I put it 7_____ my dresser. It's in my bedroom. I will get it for 8_____.
A: It doesn't matter. 9_____ get it myself.
B: By the way, you'd better put 10_____ on the shelf after you finish your reading.
“低碳生活,你我同行”,2010年10月15日,国家环保部宣教中心在浙江启动“酷中国-全民低碳行动”。这意味着全体浙江人今后将努力成为国人低碳生活的先行者。全民低碳行动的开展,使低碳生活逐渐成为一种时尚,并由此带动低碳产业的发展和壮大。这表明 [ ]
①消费是物质资料生产总过程的最终目的和动力
②消费对生产的调整和升级起着导向作用
③一个新的消费热点的出现能带动相关产业的成长
④消费为生产创造出新的劳动力
A.①②
B.②③
C.①③
D.③④