Polarbearsareoneofthemostpopularanimalsforpeople.Polarb...
问题详情:
Polar bears are one of the most popular animals for people. Polar bears are different from every other bear in the world. This is because polar bears have white fur. However, there are many facts about polar bears that people might not be aware of .年
The skin of polar bears is black, which according to allows them to absorb more heat from the sun. Polar bear fur is transparent , because it is made up of hollow guard hairs. explains that the reason polar bears display white fur is that when the sun hits the fur ,the hollow spaces in the hair scatter the light. Since none of the light is absorbed, the light reflected back appears white to human eyes.
Polar bears’ conservation status is considered close to extinction. Global warming is considered the main cause of the decline in polar population. Polar bears use ice floats to hunt for their food. However, these ice floats are melting so polar bears are starting to drown in the search for food ,and the food is becoming more difficult to get. Contrary to popular belief, polar bears do not eat penguins ,because polar bears are not found in the Antarctic region of the world. Polar bears are only found around the Arctic Circle. Polar bears do not drink water. They get all the water they need from the prey they eat.
FES. Gov specifies that polar bears are considered the largest land carnivores(食肉动物) in the world. The polar bear weight ranges between 700--1,500 pounds. Since the polar bear habitat is melting away, their main evolutionary advantages are fading. Polar bears are not able to use their camouflage(伪装) to find prey in habitats not covered with snow. Polar bears do not hibernate(冬眠). However, when the weather gets uncomfortable, or mothers give birth, polar bears will dig themselves a hidden home.
What can we do to help save the polar bears? We can donate to organizations like the World Wildlife Fund, reduce our carbon footprint, and send letters to politicians explaining to them that we need to set up more preserves to help save the polar bear habitat.
12. What do we know about the fur of the polar bears?
A. It absorbs more heat from the sun.
B. It is black and hollow.
C. Light can pass through it.
D. It is white actually.
13. What does “main evolutionary advantages” in Paragraph 4 refer to?
A. Hibernation habit B. The function of their fur
C. Eating meat D. Their weight
14. What do we know from the passage?
A. Polar bears face danger due to the melting of ice floats.
B. The biggest polar bears weigh about 1,000 pounds.
C. Polar bears never hibernate and do not need water.
D. Polar bears are the largest carnivores in the world.
15. Which of the following ways is NOT the measure used to protect polar bears according to the passage?
A. Donating to wildlife conservation organizations.
B. Trying our best to reduce greenhouse gases.
C. Writing letters to make people protect polar bears.
D. Setting up more polar bear conservation organizations.
【回答】
BBAD
知识点:阅读理解
题型:阅读理解
-
目前,制造*自己航母的呼声越来越高,如图所示是某位网友提供的*航母的设想图.一艘航母的舰载机飞离航母后,则...
问题详情:目前,制造*自己航母的呼声越来越高,如图所示是某位网友提供的*航母的设想图.一艘航母的舰载机飞离航母后,则有()A.航母将上浮,所受浮力减小B.航母将下沉,所受浮力增大C.航母将下沉,所受浮力减小D.航母始终漂浮,所受浮力不变【回答】考点:物体的浮沉条件及其应用.347398...
-
下列各组中,含有离子晶体、分子晶体、原子晶体各一种的是( )A.HCl、H2SO4、S ...
问题详情:下列各组中,含有离子晶体、分子晶体、原子晶体各一种的是( )A.HCl、H2SO4、S B.金刚石、Na3PO4、MgC.HF、SiC、Ar D.H2O、SiO2、K2CO3【回答】D知识点:物质结构元素周期律单元测试题型:选择题...
-
2003年楚人学舟楚①人有习*舟者,其始折旋②疾徐,惟舟师之是听。于是小试洲渚之间,所向莫不如意,遂以为尽*舟...
问题详情:2003年楚人学舟楚①人有习*舟者,其始折旋②疾徐,惟舟师之是听。于是小试洲渚之间,所向莫不如意,遂以为尽*舟之术。遽谢舟师,椎③鼓径进,亟犯④大险,乃四顾胆落,坠桨失柁⑤。【注释】①楚:古国名。②折:调头。旋:转弯。③椎:用椎敲。古代作战,前进时以击鼓为号。④亟...
-
早春二月的某一天,A市的平均气温为-5℃,B市的平均气温为3℃,则当天B比A市的平均气温高
问题详情:早春二月的某一天,A市的平均气温为-5℃,B市的平均气温为3℃,则当天B比A市的平均气温高____________℃.【回答】8提示:3-(-5)=8.知识点:有理数的加减法题型:填空题...
相关文章
- It'sreportedthatalargenumberofpeople
- Pollutedairborneparticles(大气悬浮颗粒)kill7millionpeopleayea...
- Plentyofpeopledreamoftravelingtootherplanets.But“StarWa...
- Thereisanendlesssupplyofstoriesaboutsleepwalkers(梦游者).P...
- SomeHelpfulTipsforaHappierYouI'vebeenoneofsadpeoplebefo...
- 完形填空。Nosports,nolifeSportsareveryimportanttous.Sportshe...
- Europe’sMarsorbiter(人造卫星)hasfoundwatermolecules(分子)vapo...
- 按要求完成下列句子。1.Theprogramistooboringformanypeopletolike.(改...
- 完形填空Likemostpeople,Iwasbroughtuptolookuponlifeasaproces...
- PopeyetheSailor《大力水手》firstbecameapopularcartooninthe193...