(二)

Artificial 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 completed. 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.

The underlined word "it" refers to（）.

A．the intention

B．the collection

C．one member

D．each flower family

梅－罗氏综合征的临床表现为（）

A.裂纹舌、口角炎、腺性唇炎

B.裂纹舌、面瘫、肉芽肿性唇炎

C.地图舌、口角炎、贫血

D.地图舌、面瘫、贫血

E.舌 * * 炎、面瘫、肉芽肿性唇炎