题目

Art museums are places where people can learn about various cultures. The increasingly popular “design museums” that are opening today, however, perform quite a different role. Unlike most art museums, the design museum shows objects that are easily found by the general public. These museums sometimes even place things like fridges and washing machines in the center of the hall.People have argued that design museums are often made use of as advertisements for new industrial technology. But their role is not simply a matter of sales--it is the honoring of excellently invented products. The NaCl是一种化工原料，可以制备一系列物质（见图4）。下列说法正确的是 A.25℃，NaHCO3在水中的溶解度比Na2CO3的大 B.石灰乳与Cl2的反应中，Cl2既是氧化剂，又是还原剂 C.常温下干燥的Cl2能用钢瓶贮存，所以Cl2不与铁反应 D.图4所示转化反应都是氧化还原反应