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阅读下面短文,从所给的四个选项中,选出最佳答案。

       Artificial flowers are used for scientific as well as for   decorative purposes (装饰的用处). They are made from a variety of   materials, such as wax (蜡) and glass, so skillfully that they can   scarcely be told from natural flowers. In making such models, skill   and artistry are called for, as well as thorough knowledge of plant   structure. The collection of glass flowers in the Botanical Museum of   Harvard University is the most famous in North America and is widely   known throughout the scientific world. In all, there are several   thousand models in colored glass, the work of two artist-naturalists,   Leopold Blaschka and his son Rudolph.

       The intention (目的) was to have the collection represent (代表) at   least one member of each flower family native to the United States.   Although it was never completed, it contains more than seven hundred   kinds representing 164 families of flowering plants, a group of fruits   showing the effect of fungus (菌类) diseases, and thousands of flower   parts and magnified detail (事情). Every detail of these is accurately   reproduced in color and structure. The models are kept in locked cases   as they are too valuable for classroom use.

(1) Which of the following statements about Leopold and Rudolph   Blaschka is true?

[  ]

A. They were farmers.     

B. They were brothers.

C. They were artists.     

D. They were florist.

(2) Which of the following is not included in the display at Botanical   Museum of Harvard University?

[  ]

A. Several kinds of native birds.

B. Magnified details of flower parts

C. A group of diseased fruits.     

D. Models of 164 families of flowering plants.

(3) The underlined word "it" refers to which of the following phrases?

[  ]

  A. "The collection".  

  B. "One member".  

  C. "Each flower family".

  D. "The intention".

(4) Where in the passage does the author mention the prerequisites   for making artificial flowers?

[  ]

  A. Lines 13-14.     

  B. lines 4-5.

  C. Lines 8-9.     

  D. Lines 11-12.

(5) Which of the following is the best title for the passage?

[  ]

A. An Extensive Collection of Glass Flowers.

B. Materials Used For Artificial Flowers.

C. The Lives of Leopold and Rudolph Blaschka.

D. Flowers Native to the United States.

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