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leys. When the British traveler Robert first came across the valleys more than 100 years ago, he thought they are lifeless:” It is certainly a valley of the dead.”Scientists have found that Scott was wrong. The Dry Valleys are one of the driest deserts in the world it rains little a year. But they are not lifeless. In that dry sand and rocks, there are different kinds of organisms that e to life when it rain. For a few weeks each summer, snow turns into water. Colorful organisms grow when the valley is wet.The organisms that live in the dry valley can stand cold and dry weather. Most are microscopic, but we can see a few with our eyes. The largest organisms in the Dry Valleys are springtails. But what about penguins? Like sea birds and seals, penguins can’t really live on land. They can only spend some time on the ice and land. Scientists say that springtails(跳蟲) are the “elephants” of Antarctica.Scientists study the organisms that live in the valley, others study geology. They want to find out the relationship between the organisms and the valley they live in. the Dry Valley, some kinds of organisms grow when ________.A. It is cold B. it rains C. it snows D. it is fine underlined word “microscopic” means ___________in Chinese.A. 強(qiáng)大的 B. 虛弱的 C. 巨大的 D. 極小的 agree that springtails are _________living things in the valley.A. Little B. long C. big D. small to the last paragraph, scientists don’t know clearly___________.A. the relationship between the organisms and the valleyB. if there are some kinds of living things in the Dry ValleyC. when the living things e to life in the Dry ValleyD. what the living things in the Dry Valley look like CHow does a big pany like Dannon e up with a new kind of food for kids? What’s the science that goes into it? To find the answers to these questions, I visited the Dannon Innovation Center, in New York.Greekstyle yogurt is being more and more popular with adults. But Dannon USA did surveys and found that while parents are eating Greek yogurt, their kids aren’t. “We didn’t know why,” said Dannon’s Michael.” Kids told us that Greek yogurt was too thick and too sour.”What did Dannon do with this information? They looked for ways to make the yogurt interest kids.Making yogurt is simple, explained Dr Thierry SaintDenis, Dannon’s director “Talk milk. Mix in bacteria. Keep it warm for a few hours. Then a natural chemical process called fermentation turns the milk into yogurt.”What makes yogurt “Greek”? it’s thicker than usual yogurt, and less sweet. Dannon’s scientists looked for special bacteria that would make their Greek yogurt feel less thick and taste sweeter to kids. Dr SaintDenis said that after many tests, they found those bacteria. But he couldn’t tell TFK which bacteria: they are trade secrets.Finally, I got to taste the finished Greekstyle yogurt. Out of the five new flavors, my favorite was Mixed Berry HalfPipe. I