2.D　细节理解题。由倒数第二段标题“Austin street food offers various&delicious flavors”可知,在奥斯汀的大街上即可品尝到其地方风味的小吃。

　　3.A　推理判断题。根据第一段“Hi,I’m Pelpina Trip,here for About.com to show you...”和最后一段“Thanks for your watching.For more information,visit us at About.com.”可推知,这是一则网上的视频文稿,在网上看视频时便可看到,故选择A项。

　　B

　　Climate change has caused a rise in sea levels.This has increased the amount of salt in fresh water used on coastal farms.As a result farmers are increasingly unable to use fields close to the sea.

　　Scientists call this process “salinization”.The term comes from the word “saline”—which means a mixture of salt and water.The United Nations Food and Agriculture Organization says salinization is reducing the world’s irrigated lands by 1 to 2 percent every year.

　　But a farmer in the Netherlands is now using a mixture of sea and fresh water to grow healthy and tasty vegetables.Marc Van Rijsselberghe started with an experiment.

　　“We put a lot of plants in the fields and then,we put them in fresh water and in sea water and all the varieties between it,and then we see which variety is surviving and which variety is dying.”

　　Mr Van Rijsselberghe worked on the project with scientists from the Free University of Amsterdam.He divided a farm into eight irrigated areas.Separate pipes pumped fresh and sea water,and a computer program created water with eight levels of salinity.“And then the computer says ‘go’ and then it goes to the fields and dripping irrigation starts to work and we are going to kill plants.That’s it.”

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