2012年3月20日，新疆出现今年首次沙尘暴，图中的天气符号表示沙尘暴的是（　　）

阅读下列材料，根据要求写一篇不少于800字的文章。

    网络谣言是指通过网络介质而传播的没有事实依据带有攻击性，目的性的话语。如今，随着社交网站的普及，谣言日益泛滥。如“六翅肯德基怪鸡”“我国每年农药用量337万吨，相当于每人吃掉2．59公斤”“食品过地铁安检后会有辐射残余不能再吃”“吃猪血鸭血能除霾”等等。谣言，俨然成了一种看不见的污染。各种谣言的迅速而广泛传播，应引起个人和社会的深思。

    请根据材料，结合自己生活中的观察体会，阐述你的看法。要求选好角度，确定立意，明确文体，自拟标题，不要套作，不得抄袭。

      Many people like to travel by plane, but I don't like it because an airport is usually far from the city. You have to get there early and wait for hours for the plane to take off and it is often late. You can't open the windows. You can't choose the food. Planes are fast, but it still takes hours to go out of the airport and into the city.

      I like traveling by train. I think trains are safe. Railway stations are usually in cities. When you are late for a train, you can catch another one. You can walk around in the train and open the windows. You can see many interesting things on your way. I know it takes a little more time.

      I also like cars. You can start your journey when you want to and you don't need to get to a railway station or a bus stop. Also you can carry many things with you in a car. But sometimes there are too many cars on the road.