题目

下列物体中，通常情况下属于绝缘体的是（ ）    A． 铁钉                 B． 钢锯条                    C． 塑料尺                    D． 食盐水溶液 答案：C解： 铁钉、钢锯条、食盐水溶液都能导电是导体；故ABD错误； 塑料尺不容易导电是绝缘体；故C正确； 故选C．Food is a hot issue in China. Eating, 1.(consider) to be an important part of each day, is far beyond simply meeting a need;2.now, people sometimes hardly have time to enjoy their food, because they are living in a fast-paced society. They need fast food. That’s 3.China’s fast-food market expands.The first foreign fast-food restaurant to arrive in China was called KFC, quickly followed by Pizza Hut, McDonald’ s and so on. With the 4.(develop) of China, foreign fast-food chains are realizing high-speed growth in China. However, being unable 5.(provide) balanced nutrition, these “junk foods” 6.(criticize) by health experts for a long time The experts also show that some foreign fast food consists 7.certain cancer-causing chemicals.8.(actual), the Chinese diet contains many of its own 9.(tradition) fast-food dishes. Among them, dumplings, soybean milk and noodles are the most popular. Compared with foreign fast food, those are healthier. But many Chinese still enjoy the special taste and the good environment in the foreign fast-food chains. It’s high time that they 10.(wake) up to the fact of the potential risks with foreign fast-food.