题干

20世纪80年代,美国在亚利桑那州的沙漠上建造了一个实验基地“生物圈Ⅱ号”.

(1)你对“生物圈Ⅱ号”有何了解?

(2)科学家在“生物圈Ⅱ号”中进行的探索虽然没有完成预定的计划,但是它用事实告诉了人们一个道理.这个道理是什么?

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答:(1) “生物圈Ⅱ号”是一个巨大的封闭的生态系统,模拟自然的生态体系,有土壤、水、空气与动植物,甚至还有森林、湖泊河流和海洋.1991年,8个人被送进 “生物圈二号”,本来预期他们与世隔绝两年,可以靠吃自己生产的粮食,呼吸植物释放的氧气,饮用生态系统自然净化的水生存.模拟一个与生物圈类似、可供人 类生存的生态环境。(2)迄今为止,地球仍是人类和其他生物的唯一家园,我们应该珍惜它,爱护它。

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    When my wife and I decided to open our bookstore in 2012, we were a little 1.

    The challenges facing small bookstores were—and remain— 2. Aside from the obvious 3 in online selling, the increase in the popularity of e-books has had a(n)4 effect on independent providers.

    The question is why a new, small-scale(小规模的)provider would 5 enter such a(n)6 market?

    From a personal view, our reasoning was sound: we wanted to 7 our love of great books and reading for pleasure with as many 8 people as possible.

    Having done our homework, one thing became 9. In order for us to succeed, we would have to offer something that none of our larger competitors already provided.

    And so we 10 the Willoughby Book Club. We set up our website in the summer of 2012—and we haven't looked back.

    The idea of 11 is simple. We offer a range of book subscription gift packages, 12 in three-, six- and 12-month options. Our customers 13 a package, tell us a little about the person they're buying it for, and we use this information to 14 the(接收者)a hand-picked, gift-wrapped(包装的)book once a month.

    We also recently decided to 15 one new book to Book Aid International for every gift subscription sold. These books are sent out to sub-Saharan Africa, 16 the educational work there.

    Within four months of starting out, we won the Young Bookseller of the Year award at the 2013 Bookseller awards.

    Our brief 17 from new booksellers to award receivers has been challenging and 18. The biggest thing we've learned is that, despite the 19 facing independent providers, there is a 20 for then in the UK market. It's just a question of finding it.