问题
单项选择题
| Artificial flowers are used for scientific as Well as for decorative purposes. They are made from (51) of materials, such as wax and glass, so skillfully that they can scarcely be (52) from natural flowers. In making such models, painstaking skill and artistry are called for, (53) thorough knowledge of plant structure. The (54) of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known (55) the scientific world. (56) , 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 (57) at least one member of each flower family native to the United States. (58) it was never completed, it contains more than seven hundred species representing 164 families of flowering plants. (59) detail of these is accurately reproduced in color and structure. The models are (60) n locked cases as they are too valuable and fragile for classroom use. |
A．through
B．throughout
C．over
D．on
答案
参考答案：B
解析：本题要求填入确切的介词，与后面的the scientific world一起构成一个地点状语。B项 throughout指“遍及”，后接the scientific world时，意为“全科学界”，是正确答案。A项 through表示“通过；以……”不符合句意，C项over与a11连用时，表示“遍及”，因此也不能选用。D项on表示“关于”，与句意相差更远。