Paul Nicklen waited patiently on a sheet of ice in the Arctic. He was there to take pictures for National Geographic. Finally, he saw something big and white. It was a polar bear, swimming toward him in the icy water.Paul lay down on the ice to get a better photo, but the bear jumped out of the water and tried to attack him! Luckily for Paul, the ice cracked, or broke, and the bear fell back into the water. The polar bear wasn’t so lucky. It couldn’t get a meal and had to swim farther away to find food.To understand the polar bear’s problem, you need to know two things about the Arctic. First, the Arctic is mostly ocean. Second, ice covers a lot of the Arctic Ocean. In winter, the ice forms a thick, white sheet, but in summer, the ice is thinner and breaks into pieces. Sea ice is the key to survival for Arctic animals. However, because of global warming, Arctic temperatures are rising and polar ice is melting.Polar bears need ice to hunt seals, their favorite meal. They stand on the ice and wait for the seals to come up for air. As Arctic ice melts, polar bears have to swim farther to find ice floes, or large pieces of floating ice. Sometimes, bears have to swim more than 200 km to find an ice floe. Some bears cannot swim that far and, sadly, they drown.On his last trip, Paul Nicklen saw three polar bear carcasses. Before global warming threatened Arctic ice, a dead bear was a rare sight. Paul is sad to see the dead bodies. Wildlife experts think global warming will have a terrible effect on polar bears. In the future, polar ice will continue to shrink and endanger the bears. Some scientists believe 65 percent of the world’s polar bears will disappear by 2050. In other words, polar bears are in danger of becoming extinct.1. 请你凭第一印象，不细读文章，直接在文中画出文中你不认识的陌生单词。2. 请依据所接触到的句法规则，借助文本判读所画出的陌生单词的词性。3. 请你借助相关阅读策略，通读全文，尝试理解文章的主旨大意。4. 请你思考，通过通读全文，借助主旨大意，你可以大致理解了哪些词义？用到了哪些词语猜测策略？5. 请你再次通读全文，圈出仍然不理解的生词，并思考相关的解决方式。6. 你有全部解决文中的生词吗？你是如何解决的？对你的启迪有哪些？Paul Nicklen waited patiently on a sheet of ice in the Arctic. He was there to take pictures for National Geographic. Finally, he saw something big and white. It was a polar bear, swimming toward him in the icy water.Paul lay down on the ice to get a better photo, but the bear jumped out of the water and tried to attack him! Luckily for Paul, the ice cracked, or broke, and the bear fell back into the water. The polar bear wasn’t so lucky. It couldn’t get a meal and had to swim farther away to find food.To understand the polar bear’s problem, you need to know two things about the Arctic. First, the Arctic is mostly ocean. Second, ice covers a lot of the Arctic Ocean. In winter, the ice forms a thick, white sheet, but in summer, the ice is thinner and breaks into pieces. Sea ice is the key to survival for Arctic animals. However, because of global warming, Arctic temperatures are rising and polar ice is melting.Polar bears need ice to hunt seals, their favorite meal. They stand on the ice and wait for the seals to come up for air. As Arctic ice melts, polar bears have to swim farther to find ice floes, or large pieces of floating ice. Sometimes, bears have to swim more than 200 km to find an ice floe. Some bears cannot swim that far and, sadly, they drown.On his last trip, Paul Nicklen saw three polar bear carcasses. Before global warming threatened Arctic ice, a dead bear was a rare sight. Paul is sad to see the dead bodies. Wildlife experts think global warming will have a terrible effect on polar bears. In the future, polar ice will continue to shrink and endanger the bears. Some scientists believe 65 percent of the world’s polar bears will disappear by 2050. In other words, polar bears are in danger of becoming extinct.1. 请再次阅读全文，思考针对相关划线词汇理解，你用到了哪些词汇学习策略。3. 相关划线部分词汇在相关句子中的功能和作用是什么。4. 文中五个红色字体的单词在句子中是什么词性、充当什么句子成分。5. 文中五个红色字体的单词只有上述句子中呈现的一种词性吗？如果还有其他词性，又是什么？6. 你能借助工具书整理一下五个红色字体的单词的用法吗？7. 你能结合五个红色字体单词的学习，梳理一下词语学习的感悟吗？
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