在职攻硕英语考试

解析：Artificial flowers are used f

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【单选题】

Artificial flowers are used for scientific as Well as for decorative purposes. They are made from{{U}} (51) {{/U}}of materials, such as wax and glass, so skillfully that they can scarcely be{{U}} (52) {{/U}}from natural flowers. In making such models, painstaking skill and artistry are called for,{{U}} (53) {{/U}}thorough knowledge of plant structure. The{{U}} (54) {{/U}}of glass flowers in theBotanical Museum of Harvard University is the most famous in NorthAmerica and is widely known{{U}} (55) {{/U}}the scientific world{{U}}. (56) {{/U}}, there are several thousand models in colored glass, the work of two artist naturalists, LeopoldBlalschka and his son Rudolph.
The intention was to have the collection{{U}} (57) {{/U}}at least one member of each flower family native to the United States.{{U}} (58) {{/U}}it was never completed, it contains more than seven hundred species representing 164 families of flowering plants.{{U}} (59) {{/U}}detail of these is accurately reproduced in color and structure. The models are{{U}} (60) {{/U}}n locked cases as they are too valuable and fragile for classroom use.
A．a variety
B．some
C．a sort
D．several

网考网参考答案：A
网考网解析：
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”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

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