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2008年8月8日，第29届奥运会在北京举行． （1）北京奥运场馆倍受世人瞩目。下列介绍的材料中，属于有机合成材料的是____________（填字母，下同）。 （2）北京奥运村的生活热水都由太阳能热水利用系统提供．下列有关太阳能的说法中，正确的是___________（多项选择） A．取之不尽 B．是化石燃料 C．是无污染能源 D．可转变为热能、电能 （3）北京奥运“蓝天计划”重在改善北京的空气质量。市政府采取的有效措施之一是冬季用燃烧天然气代替燃煤取暖，该项措施的作用是_________________________________．
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【单选题】How can we tell whether a kid has good relationships with his or her grandparents?
A.
They are more active.
B.
They are spoiled.
C.
They are more trusting.
D.
They are more energetic.
【单选题】Where are they?
A.
They are in a shop.
B.
They are in a library.
C.
They are in a bookshop.
【简答题】A．They want the teachers to resign. B．They want the teachers to return to work. C．They are very sympathetic toward the strike. D．They are refusing to comment on the situation.
【简答题】A．They are a type of insect. B．They are a kind of fish. C．They are a type of bird. D．They are a type of pig.
【简答题】依据风险的性质分类风险可以分为( )和( )
【简答题】A．They are a customer and a salesman. B．They are a customer and a repairman. C．They are a and an insurance company manager. D．They are a salesman and a factory manager.
【简答题】Tim and Li Fang are not going to have any classes next week. They’re going to work on a farm. They are going to leave at about seven thirty on Monday morning. They are going to travel to the farm by b...
【单选题】在一定条件下发生的下列反应中，属于消去反应的是（）。
A.
乙醇和氢溴酸反应生成溴乙烷
B.
苯和浓硝酸反应生成硝基苯
C.
乙酸和乙醇反应生成乙酸乙酯
D.
由乙醇制备乙烯
【单选题】Where are they going?
A.
They are going to the cinema.
B.
They are going to a concert.
C.
They are going to a party.
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