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【单选题】
下列关于化学史方面的叙述中，不正确的是：A.
最早用湿法炼铜的国家是希腊
B.
最早提出现代原子论的是英国科学家道尔顿
C.
最早通过实验得出空气是由氮气和氧气组成的是法国化学家拉瓦锡
D.
最早发现元素之间存在联系并排列出现代元素周期表的是俄国科学家
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【单选题】听力原文：M: How is school going, Barbara? Are you taking any new classes? W: I'm taking another really interesting course called Business and the Web. We are learning about e-commerce and how new technolo...
A.
E-commerce.
B.
Wireless communications.
C.
Business and the web.
D.
New technology.
【单选题】What can be inferred from the first paragraph?
A.
Taking a nap is useless for busy people.
B.
Taking a nap is viewed as something for curing disease.
C.
Taking a nap is regarded as lazy to work.
D.
Taking a nap can promote your work efficiency.
【单选题】听力原文：M: How is school going, Barbara? Are you taking any new classes? W: I'm taking another really interesting course called Business and the Web. We are learning about e-commerce and how new technolo...
A.
E-commerce.
B.
Wireless communications.
C.
Business and the web.
D.
New technology.
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