2. 外语
  3. Artificial flowers are used for scientific as Well as for decorative purposes. They are made from 【B1】 of materials, such as wax

Artificial flowers are used for scientific as Well as for decorative purposes. They are made from 【B1】 of materials, such as wax

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问题     Artificial flowers are used for scientific as Well as for decorative purposes. They are made from 【B1】 of materials, such as wax and glass, so skillfully that they can scarcely be 【B2】 from natural flowers. In making such models, painstaking skill and artistry are called for, 【B3】 thorough knowledge of plant structure. The 【B4】 of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known 【B5】 the scientific world. 【B6】 , there are several thousand models in colored glass, the work of two artist naturalists, Leopold Blalschka and his son Rudolph.
    The intention was to have the collection 【B7】 at least one member of each flower family native to the United States. 【B8】 it was never completed, it contains more than seven hundred species representing 164 families of flowering plants. 【B9】 detail of these is accurately reproduced in color and structure. The models are 【B10】 n locked cases as they are too valuable and fragile for classroom use.
选项 A、a variety
B、some
C、a sort
D、several
答案A
解析 B项some和D项several均表示“一些”，some/several of后面应当接表示限定范围的名词或代词，如：some of the students，several of them。因此，用在本句不合适。C项a sort表示“一种”，这与句子后半部分的举例相矛盾，因而也不能适用。正确答案应选A项a variety，表示“种种”。
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