下列各项叙述中，不正确的是
A．氯化氢是纯净物，盐酸是混合物
B．在H2O2＋Cl2=2HCl＋O2反应中，每生成32 g氧气，则转移2 mol电子
C．0.012kg 12C所含的原子数能表示阿伏加德罗常数的数值
D．16g CH4与18 g NH4＋所含质子数相等
答案：D
D不正确，16g CH4所含质子数为10mol；18 g NH4＋所含质子数为11mol
| 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．in addition
B．as well
C．as well as
D．moreover