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2016下半年英語六級聽力講座練習(xí)題
新改革的英語六級考試中，聽力和閱讀部分依然占據(jù)很高的分?jǐn)?shù)比例，以下是yjbys網(wǎng)小編整理的關(guān)于英語六級聽力講座練習(xí)題，供大家備考。
Now listen to the following recording andanswer questions 22 to 25
22
A.In the Antarctic.
B.In southern Canada.
C.In northern Russia.
D.In northern Asia.
23
A.They are huge and weigh up to 72kg.
B.Their thick, white fur is a natural cover.
C.They can swim a few hundred meters.
D.Their favorite food is fish in the ocean.
24
A.Warmer weather.
B.Massive killing.
C.Genetic evolution.
D.Environmental pollution.
25
A.Polar bears will be able to catch more fish.
B.Polar bears will have fewer things to eat.
C.There will be more seals in the area.
D.The winter will become shorter.
(22) What I'd like to discuss with you today is thepolar bear. As I already mentioned on Tuesday, polarbears only live in the Arctic, primarily in northernCanada, northern Russia, and Alaska. If, forexample, you are in southern Canada, you won't seeany of these bears.
Now, you're probably aware that the Arctic is anextremely harsh environment and one of the coldest places on Earth. But let me remind youof what it's really like in the Arctic, especially in late December or early January. Thetemperature frequently drops below minus 40 degrees centigrade and sometimes gets evencolder! Combine that with strong winds, little or no sunlight, and very little vegetation, and whatyou get is an environment in which very few species are capable of surviving. The polar bear,however, thrives in this kind of environment. The polar bear spends his time roamingthroughout the Arctic, walking on land and ice, swimming in freezing sea water and floating onsheets of ice while looking for seals, fish, and other food. Their favorite food is seals, which theyfind along the edges of the ice, in holes in the ice, and under cracks in the ice.
Polar bears are much bigger than the brown and black bears. In fact, they're huge! They weighup to 720kg. And they're designed to survive in their environment. (23) They have very thick,white fur, which helps them hide in the snow and ice and overcome the extreme cold. Polarbears are also strong swimmers. They have large front paws that amazingly allow them to swima few hundred kilometers from land.
Despite their impressiveness, polar bears, unlike black bears, are an endangered species. (24)This is a result of global warming, which will be topic of our next film. The Arctic is becomingtoo warm for the bears. That ice I just mentioned to you is now disappearing! It breaks upmuch earlier in the spring, and now it's a lot further from land! Ice thickness in the Arctic hasdecreased by 40 percent in the last 30 years, and some scientists predict that the Arctic basinmight not have any ice in another 50 years. For polar bears, this is terrible! (24/25) Ice isessential to their existence! Less ice means fewer seals and less food.
Polar bears do their hunting in the winter, but because the winter is getting shorter andbecause the ice is disappearing earlier, they have less time to restore their fat. In the summer,they're forced to remain on land for longer periods of time, and during that time, they live offthe fat stored in their bodies. Thirty years ago, they spent just over three months on land. Nowit's almost four months! This reduces their strength and energy. With less ice, polar bears mustswim further to reach it. This further reduces their strength and energy. These circumstanceshave steadily decreased the bear population over the last 30 years.
22. Where can we see polar bears according to the lecture?
23. What can we learn about polar bears?
24. What made polar bears become endangered?
25. What will happen if there is less ice in the Arctic?
今天我想和大家討論的是北極熊。如我在周二所說，北極熊只生活在北極地區(qū)，最初是在加拿大和俄羅斯北部，還有阿拉斯加。如果你住在加拿大南部，那你就不會看到北極熊。現(xiàn)在，你可能會想，北極地區(qū)環(huán)境惡劣，是地球上最冷的地方。但是我要告訴你真實(shí)的北極是什么樣子的，尤其是在12月底和1月初。氣溫通常會降到零下四十?dāng)z氏度一下，有時會更低。再加上強(qiáng)風(fēng)、極為稀缺的陽光和非常少的植被，這樣的環(huán)境決定了能夠在這里生存的物種數(shù)量極少。但是北極熊在這里生活地卻很好。北極熊大部分時間都是漫步在北極的陸地和冰川之上，或者在冰冷的海水中游泳，或者在浮冰上尋找海豹、魚或者其他食物。他們最喜歡的食物是海豹。通常在冰塊的邊緣位置、冰洞或者冰塊裂縫下面能夠找到它們。北極熊體型比棕熊或黑熊大得多。事實(shí)上他們體型巨大，重達(dá)720千克。造物主給了他們能在這種環(huán)境中生存的身體條件。它們長著厚厚的白毛，可以幫助它們在冰天雪地進(jìn)行隱藏，還有助于它們克服極度的寒冷。北極熊還是游泳好手。它們巨大的前腳掌可能讓它們游離海岸幾百千米。雖然它們“天賦異稟”，但是北極熊和黑熊不同，它們現(xiàn)在已經(jīng)成為了瀕危動物。這是全球變暖帶來的后果，這將是我們下次影片中的主題。北極地區(qū)的溫度對于這些熊來說已經(jīng)太高了。我剛才提到的冰正在消失!這些冰早春便開裂，現(xiàn)在已經(jīng)飄離大陸很遠(yuǎn)了。在過去三十年里，北極冰層厚度減少了40%，并有一些科學(xué)家預(yù)言，50年后北極盆地內(nèi)將不會再有冰。對于北極熊來說，這種情況非常危險!對于它們的生存而言冰是至關(guān)重要的!冰的減少就意味著海豹的數(shù)量減少和食物的減少。北極熊在冬天覓食，但是由于冬季時間的縮短和冰的消失，它們可以在體內(nèi)儲存脂肪的時間變短了。夏天它們不得不在陸地上待更長的時間，這段時間里它們就依靠體內(nèi)存儲的脂肪生存。三十年前，它們只需在陸地上待3個月。而現(xiàn)在將近需要4個月!這消耗了它們更多的體力和能量。而且，北極熊需要游更遠(yuǎn)才能找到逐漸減少的冰塊。這又是對它們體力和能量的額外消耗。過去的三十年里，以上所有這些條件導(dǎo)致了北極熊數(shù)量的穩(wěn)步下劃。
22.根據(jù)以上講座，我們在哪里能見到北極熊?
23.關(guān)于北極熊我們了解了什么?
24.什么使北極熊成為了瀕危動物?
25.如果北極地區(qū)冰量減少，會發(fā)生什么?
參考答案：
【小題22】C
【小題23】B
【小題24】A
【小題24】B
習(xí)題解析：
【小題22】講座開頭就提到 polar bears only live in the Arctic, primarily in northern Canada,northern Russia, and Alaska，指出北極熊只是生活在北極地區(qū)，主要是加拿大北部，俄羅斯北部和阿拉斯加。選項(xiàng)中只有 C 項(xiàng)符合聽力原文，故選 C。
【小題23】關(guān)于北極熊，聽力原文中提到 They have very thick, white fur, which helps them hide inthe snow and ice and overcome the extreme cold，指出北極熊身上長著厚厚的白毛，可以幫助它們在冰天雪地進(jìn)行隱藏，還有助于它們克服極度的寒冷，因而 B 項(xiàng)表述正確，故選 B。原文中提到的北極熊的體重是 720千克，不是 72千克，因此排除 A 項(xiàng);原文中指出北極熊可以游幾百千米，而不是幾百米，故 C 項(xiàng)表述錯誤;原文中明確提到 Their favorite food is seals，指出北極熊最喜歡的食物是海豹，因此 D 項(xiàng)也可排除。
【小題24】聽力原文中提到北極熊現(xiàn)在瀕臨滅絕，隨后提到 This is a result of global warming, whichwill be topic of our next film. The Arctic is becoming too warm for the bears. 指出北極熊瀕臨滅絕是由于全球氣候變暖，對于北極熊來說溫度太高，并且后面又提到溫度提升導(dǎo)致冰融化，進(jìn)而導(dǎo)致北極熊的食物來源變少，導(dǎo)致其瀕臨滅絕，因而 A 項(xiàng)正確，故選 A。
【小題25】聽力原文中提到 Ice is essential to their existence! Less ice means fewer seals and lessfood，指出冰對于北極熊的生存極為重要，冰變少則海豹也會變少，食物也會變少，因而 B 項(xiàng)表述符合原文，故選 B。原文中并沒有提及北極熊可以在冰塊減少的情況下抓捕更多的魚，故排除 A; C 項(xiàng)與原文不符;冬天變短并不是冰塊變少導(dǎo)致的，因而 D 項(xiàng)表述也不成立，可排除。
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