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What is Larsen ice shelf？
A．The coldest part of Antarctica.
B．The most fragile part of Antarctica.
C．The closest part of Antarctica to Australia.
D．The part of Antarctic where most scientists live.
答案
更多“What is Larsen ice shelf？A．The coldest part of Antarctica.B．The most fragile part of Antar”相关的问题
第1题
听力原文： The Larsen B ice shelf covered more than 3,000 square kilometers and was 200 metres thick until its northern part disintegrated in the 1990s. Three years ago, the central part also broke up.
An international team of researchers used data collected from six sediment cores near the former ice shelf to show the shelf had been relatively intact for at least 10,000 years or since the last ice age.
The collapse therefore goes beyond what would be expected naturally at the time. Rather, the demise is likely the result of long-term thinning due to melting from underneath, as well as short-term surface melting from global climate change, the researchers suggest.
Then in five years, the shelf shrunk by 5,700 square kilometres, say scientists who found the break up caused changes in currents and species in the area.
"As the ice shelves are disintegrating, the glaciers that are feeding them from the land are surging forward," said Robert Gilbert, a geography professor at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are pushing icebergs into the sea, said Gilbert, one of the co-authors of the study in Thursday's issue of the journal Nature.
As the glaciers melt, global sea levels could change more than predicted, he said. Flooding could result in low-lying areas.
Scientists are now watching to see if the most southern part of the Larsen ice shelf, the coldest part of Antarctica. is going to break up.
The Larsen B ice shelf covered more than 3,000 square kilometers and was (36) meters thick until its northern part (37) in the 1990s. Three years ago, the central part also broke up.
An international team of researchers used data collected from six (38) near the former ice shelf to show the shelf had been (39) for at least (40) years or since the last ice age.
The (41) therefore goes beyond what would be expected naturally at the time. Rather, the (42) is likely the result of (43) due to melting from underneath, as well as short-term (44) from global climate change, the researchers suggest.
Then in five years, the shelf shrunk by (45) square kilometers, say scientists who found the break up caused changes in (46) in the area.
"As the ice shelves are disintegrating, the (47) that are feeding them from the land are (48) ," said Robert Gilbert, a (49) at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are pushing (50) into the sea, said Gilbert, one of the co-authors of the study in (51) of the Journal Nature.
As the glaciers melt, global sea levels could change more than (52) , he said. Flooding could result in (53) .
Scientists are now watching to see if the (54) of the Larsen ice shelf, the coldest part of (55) , is going to break up.
(36)
第2题
What are the speakers mainly discussing？
A．An experiment in Antarctica.
B．Part of the Larsen Ice Shelf broke off.
C．The formation of the Larsen Ice Shelf.
D．An expedition in Antarctica.
第3题
What is the size of Larsen B ice shelf before it disintegrated in the 1900s？
A．It covered more than 2,000 square kilemeters, and was 300 meters thick.
B．It covered more than 3,000 square kilemeters, and was 100 meters thick.
C．It covered more than 3,000 square kilemeters, and was 200 meters thick.
D．It covered more than 2,000 square kilemeters, and was 100 meters thick,
第4题
What's the result of an accumulation of ice？
A．An accumulation of ice would make the global climate system altered.
B．An accumulation of ice would make snow more difficult to melt.
C．An accumulation of ice would increase the amount of moisture in the air.
D．An accumulation of ice would increase the global temperature.
第5题
What is the purpose of launching the AIM spacecraft？
A．To study the climate changes above Earth"s polar region.
B．To analyze the ice clouds within Earth"s polar region.
C．To analyze the climate changes within Earth"s polar region.
D．To study the ice clouds above Earth"s polar region.
第6题
What is NOT the result of consuming fossil fuels according to the last paragraph？
A．Rainforests will be destroyed.
B．Arctic ice will be melted.
C．The earth's temperature will be raised.
D．The sea level will go up.
第7题
听力原文：M: Hey, Jane. What's so interesting？
W: What？ Oh, hi, Tom. I'm reading this fascinating article on the societies of the Ice Age.
M: The Ice Age？ There weren't any societies then, just groups of cave people.
W: That's what people used to think. But a new exhibition at the American Museum of National History shows that Ice Age people were surprisingly advanced.
M: Oh, really？ In what way？
W: Well, Ice Age people were the inventors of languages, art and music as we know it. And they didn't live in caves. They built their own shelters.
M: What did they use to build them？ The cold weather would have killed almost all of the trees, so they couldn't have used wood.
W: In some warmer climates, they did build houses of wood. In other places, they used animal bones and skins or lived in natural stone shelters.
M: How did they stay warm？ Animal skin walls don't sound very sturdy.
W: Well, it says here, that in the early Ice Age, they often faced their homes towards the south to take advantage of the sun.
M: Hey, that's pretty smart! I guess I spoke too soon. Can I read that magazine article 'after you're done？
W: No problem.
23. What did the man originally think of the people of the Ice Age？
24.How did people in the early Ice Age keep warm？
25.What does the man want the woman to do？
(20)
A．They lived in groups and were cave people.
B．There were societies in Ice Age.
C．They were advanced in arts.
D．They had a smart way of building shelters.
第8题
A．Rainforests will be destroyed
B．Arctic ice will be melted．
C．The earth，s temperature will be raised．
D．The sea level will go up．
第9题
What is NOT the result of consuming fossil fuels according to the last paragraph？
A. Rainforests will be destroyed．
B. Arctic ice will be melted．
C. The earth’s temperature will be raised．
D. The sea level will go up．
第10题
听力原文：M: Hey, Jane! What's so interesting？
W: What？ Oh, hi, Tom! I'm reading this fascinating article on the societies of the Ice Age during the Pleistocene period.
M: The Ice Age？ There weren't any societies then—just a bunch of cave people.
W: That's what people used to think. But a new exhibit at the American Museum of Natural History shows that lee Age people were surprisingly advanced.
M: Oh, really？ In what ways？
W: Well, Ice Age people were the inventors of language, art, and music as we know it. And they didn't live in caves; they built their own shelters.
M: What did they use to build them？ The cold weather would have killed off most of the trees, so they couldn't have used wood.
W: In some of the warmer climates they did build houses of wood. In other places they used animal bones and skins or lived in natural stone shelters.
M: How did they stay warm？ Animgi-skin walls don't sound very sturdy.
W: Well, it says here that in the early Ice Age often faced their homes toward the south to take advantage of the sun—a primitive sort of solar heating.
M: Hey, that's pretty smart.
W: Then people in the late Ice Age even insulated their homes by putting heated cobblestones on the floor.
M: I guess I spoke too soon. Can I read that magazine article after you're done？ I think I'm going to try to impress my anthropology teacher with my amazing knowledge of Ice Age civilization.
W: What a show-off？
(20)
A．They lived in caves.
B．They traveled in groups.
C．They had an advanced language.
D．They ate mostly fruit.
第11题
M: I'm no doctor,but it's not black and blue or anything.Maybe you just need to rest it for a few days.
Q: What does the man suggest the woman do？
(14)
A．Put ice on her foot.
B．See a doctor at once.
C．Give her foot a good rest.
D．Take the doctor's advice.
