冰雹灾害是由强对流天气系统引起的一种剧烈的气象灾害，会对人们的生产生活产生巨大的危害。下图为某区域冰雹次数等值线（单位:次/年）分布图。

玻璃仪器洗涤干净的标志是什么？

    My favorite holiday is the Spring Festival. It's usually in February, but sometimes in January. Before the Spring Festival, we always clean the house to sweep away bad luck. In my family, my mother and I spend one or two days cleaning the house. My grandparents are busy shopping. They go to markets to buy food, fireworks and many other things.

    On the eve of the Spring Festival, my family celebrates with a traditional big family dinner. There's so much delicious food that my mother cooks for us. Jiaozi is the most important. It means saying goodbye to the old year and welcoming the new year. We also watch the Spring Festival Gala as we wear our new clothes. Children are very happy when they get their lucky red packets with money. I am very lucky to have many relatives because I always get a lot of lucky money!

    I love the Spring Festival and enjoy it very much.

读北美洲地形简图，其中代表阿巴拉契亚山脉所处位置的代码是  （    ）。

如果分式$\frac{2-x}{x}$的值为0，那么x的值为 (    )