问题
选择题
生活中处处有化学，下列生活习惯或作法合理的是[ ]
A.饮水解渴，水越纯越好
B.电器着火，用水来扑灭
C.为使馒头松软可口，用小苏打发面蒸馒头
D.“锌”----人称智力之花，饮“补星”口服液补锌，喝得越多越好
答案
答案：C
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生活中处处有化学，下列生活习惯或作法合理的是[ ]
A.饮水解渴，水越纯越好
B.电器着火，用水来扑灭
C.为使馒头松软可口，用小苏打发面蒸馒头
D.“锌”----人称智力之花，饮“补星”口服液补锌，喝得越多越好
答案：C
| 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．a variety
B．some
C．a sort
D．several