五、跨学科 生物 阅读理解。
主题群:自然生态
子主题:热爱自然
语篇类型:说明文
难度:★★
Arctic foxes live on land and sea ice within the Arctic Circle(北极圈). Winter in the Arctic is quite different. From October to February, the sun never rises to shine.
Luckily, these foxes have a wonderful ability to live in the icy Arctic. Their thick fur coats and long furry tails keep the body warm. Their feet also have thick fur like built-in snow boots. This makes it harder for their prey(猎物) to hear their footsteps. And their white coats make it difficult for predators such as wolves, polar bears and golden eagles to find them among the ice and snow.
When it's not trying to keep warm or avoid predators, an Arctic fox is on the hunt for food. They prefer to eat small lemmings, but when times are difficult they'll eat whatever they can find: insects, berries, and even the droppings of other animals. Sometimes an Arctic fox will follow a polar bear on a hunting trip and eat the bear's leftovers.
If the weather gets really bad, a fox can dig a den(兽穴). Or if a fox can't find food, it can slow down its heart rate and metabolism(新陈代谢). This helps the animal save energy so it doesn't have to eat so much.
Once the animal comes out of its den, it'll try to hunt again. With food in its belly, the Arctic fox has a better chance of making it through another long, dark night.
1. What can help the Arctic foxes hunt for food more easily?
A. Their furry coats.
B. Their white coats.
C. Their long tails.
D. Their furry feet.
2. What can we learn from the passage?
A. Arctic foxes only live on insects.
B. Arctic foxes are dangerous animals.
C. Arctic foxes can stay alive in winter.
D. Arctic foxes keep food in their dens.
3. (创新考法·篇章结构)What is the structure of the passage?