Artificial flowers are used for scientific as well as for decorative purposes. They are made from【C1】______of materials, such as

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问题     Artificial flowers are used for scientific as well as for decorative purposes. They are made from【C1】______of materials, such as wax and glass, so skillfully that they can scarcely be【C2】______from natural flowers. In making such models, painstaking skill and artistry are called for, 【C3】______thorough knowledge of plant structure. The【C4】______of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known【C5】______the scientific world. 【C6】______, 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【C7】______at least one member of each flower family native to the United States. 【C8】______it was never completed, it contains more than seven hundred species representing 164 families of flowering plants. 【C9】______detail of these is accurately reproduced in color and structure. The models are【C10】______in locked cases as they are too valuable and fragile for classroom use.
【C7】

选项 A、represent
B、substitute
C、replace
D、demonstrate

答案A

解析 A项represent意为“代表”,B项substitute和C项replace是同义词,意为“代替,取代”,D项demonstrate意为“示范;证明”。根据句意,这里应是A。句子的意思是:“做这些模型的本意是让这些收藏品代表美国本土生长的每科花中至少一种。”
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