Artificial(假的) flowers are used for scientific as well as for decorative purposes. They ar

Artificial(假的) flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking 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 was to have the collection represent at least one member of each flower family native to the United States. Although it was never pleted. It contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models are kept in locked cases as they are too valuable and fragile for classroom use.
【小题1】Which of the following is the best title for the passage?A．An Extensive Collection of Glass Flowers B．The Lives of Leopold and RudolphC．Flowers Native to the United StatesD．Material Used for Artificial Flowers【小题2】It can be inferred from the passage that the goal of Leopold and Rudolph was to     .A．create a botanical garden where only exotic flowers grewB．do a thorough study of plant structureC．make a copy of one member of each United States flower familyD．show that glass are more realistic than wax flowers【小题3】The underlined word “it” refers to     .A．the intentionB．the collection　　C．one memberD．each flower familyA