动物世界
北极熊的奇妙世界

Spot a Polar Bear
• small head
• long neck
• short tail
• short, rounded ears
Polar bears don't have white fur in fact!
Their fur is see-through and their hairs reflect all of the light around them, making their fur look white.
What do they eat?
Polar bears are at the top of their food chain in the Arctic.
• Polar bears live on the land.
• Polar bears live for 20-30 years.
• Polar bears have thick fat to keep themselves warm.
• Polar bears also have large feet to help pull themselves through the water.
Did you know?
一、阅读材料,选择合适的选项。
()1. The picture above is about .
A. plants B. animals C. sports D. languages
()2. What do polar bears mainly eat?
A. Plankton. B. Krill. C. Arctic cod. D. Leopard seals.
()3. What can we learn from the picture?
A. Polar bears have white fur all over the body.
B. Polar bears have big heads and short tails.
C. Polar bears can keep themselves warm.
D. Polar bears can live for at least thirty years.
二、结合材料,选择合适的单词补全下列句子信息。
$\boxed{protection\quad paddling(划水)\quad sunlight\quad camouflage(伪装)}$
1. Polar bears' thick fat provides good against cold.
2. Their see-through fur works as natural in snow.
3. Big feet help with in water.
4. Algae at food chain base need to grow.

一、1. B 通过观察图片,可以看到北极熊的特征被详细描述,如"small head""long neck""short tail"等,这些都表明图片的主题是关于动物的。此外,文中还提到北极熊在食物链中的位置以及它们的饮食和习性,进一步证实了图片是关于动物的。
2. D 文中明确提到"Polar bears are at the top of their food chain in the Arctic.",并且在食物链的图示中,北极熊位于最顶端,其箭头连接豹海豹(Leopard Seal),这表明北极熊主要以豹海豹为食。
3. C 文中提到"Polar bears have thick fat to keep themselves warm.",这表明北极熊有厚厚的脂肪来保暖。虽然文中也提到北极熊的毛发看起来是白色的,但这并不意味着它们全身都是白毛(A错误)。文中提到北极熊有"small head",而不是大头(B错误)。文中还提到北极熊的寿命是20-30年,而不是至少30年(D错误)。
二、1. protection 意为"保护",文中提到"Polar bears have thick fat to keep themselves warm.",说明北极熊厚厚的脂肪能保暖,也就是能抵御寒冷,所以用"protection"。
2. camouflage 文中"Polar bears don't have white fur in fact! Their fur is see-through and their hairs reflect all of the light around them, making their fur look white."体现了北极熊的毛透明且能反射光,使其呈现白色,这种特性在雪地中起到伪装作用,用"camouflage"表示伪装。
3. paddling 文中讲到"Polar bears also have large feet to help pull themselves through the water.",指出大脚蹼能帮助它们在水中划水,所以填"paddling"。
4. sunlight 从文中提供的食物链图片可知,藻类处于食物链的底部,而藻类进行光合作用需要阳光,用"sunlight"表示阳光。