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碳水化合物中的单糖主要包括、和。
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单胃动物对饲料中碳水化合物的消化是从开始的。
任务一：如果决定将总公司的网络划分为5个子网，请问下列子网掩码哪个是合理的？
Li LeiMy favorite book is A Friend like Henry. It’s about how a family dog helps a boy deal with his autism(孤独症). When I felt sad, my best friend gave me the book. It cheered me up.TonyReading in the holiday is an interesting thing. Twenty Thousand Leagues Under the Sea is my favorite book. It’s about a captain’s travel under the sea. The story is very interesting and the pictures are fantastic. This book can make you relaxed.Bob I like reading the Four Great Classical Novels of China although I’m a foreigner from Sydney. I can’t wait to tell the story The Romance of the Three Kingdoms(王国). It taught me a lot about the three kingdoms of Wei, Shu and Wu. If you are interested in history, don’t miss it.MaryIn my opinion, The Little Prince(王子) is the best one. In this book, a young prince falls to Earth from a small planet and experiences a lot. It’s not just a fiction story, but tells us about the correct values. (8.0) (1). [单选题] (2.0分) When Li Lei felt __________, her friend gave her the book A Friend like Henry.
In modern society, living without money sounds almost impossible. However, that’s exactly what an Australian couple from a big city has been doing for nearly a whole year.Rachel Newby, 25, and Liam Culbertson, 27, have come up with creative ways of making it through the year without spending any money. They built themselves a new house. The house was made of used wood and recycled materials. They grew their own food, and at times they didn’t hesitate(犹豫) to look for food in the dustbins (垃圾箱).But this year has been quite difficult. The soil(土壤) in their garden was too poor to grow vegetables. The climate there was terrible as well. They kept moving their home till they finally lived in a 2.5-square(平方)-meter house. They collected cold rainwater to take a shower. What’s worse, they had to share a toilet with the rest of the community.Even though they had no jobs, they didn’t have a lot of free time to waste. They spent most of the day working for local farmers planting vegetables and picking fruit so that they could earn their next meal. They had five ducks that could provide them with fresh eggs. But when there wasn’t enough food for them, they had to go to look for food in the dustbins.Not everyone is brave enough to do this. But they really made it work and they felt happy. (8.0) (1). [单选题] (2分) How long does the Australian couple live without money?
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