河南濮陽縣第三中學(xué) 李少華

體裁 說明文 文章詞數(shù) 2 8 7難度指數(shù)★★★題材 環(huán)境建議用時(shí)5′

Recently，evidence shows that some of the East Antarctic glaciers（冰川）have also started on a slow，backward march that could eventuallylead tothe loss of even more ice than exists in all of West Antarctica.

In a study published in July，scientists found that the Totten and Moscow University glaciers of East Antarctica—directly south of Australia—lost about 18 billion tons of ice each year between 2002 and 2016.

That's only about a third of what the West Antarctic glaciers are losing each year.Butlocked upin the Totten and the smaller neighboring Moscow University glaciers of East Antarctica is enough ice to raise sea levels over 16 feet.If melted fully，the complete melting of the West Antarctic glaciers，would cause more damage.

Scientists have long worried about the West Antarctic glaciers.Not only is warm water gnawing（侵蝕）at their edges.The biggest issuelies inthe very shape of the land upon which they sit.Much of the rock floor underneath（在……底下）the glaciers lies far below sea level.The glaciers above are fat with ice，tucked into（塞進(jìn)）the basin（海盆）like a giant（巨大的）ice cube frozen into a bowl.

The edges of the ice sheet spill（溢出）over the edges of the bowl and poke out（涌出）into the ocean like a mushroom cap，floating on top of the sea that surrounds the continent.That cap provides a key service，which blocks the ocean from reaching the lip of the giant rock bowl in which the ice sheet sits.But if those edges decrease too fast，ocean watersrun outof the bowl and start rushing inunder the bottom ofthe ice sheet.And water—even very cold Antarctic water melts ice.

Reading check

Read the text and find the right answers.

1.How does the author organize the paragraph 2？

A.By listing figures.

B.By giving examples.

C.By making a comparison.

D.By analyzing the process.

2.What do the scientists worry about West Antarctic glaciers？

A.The sea level becomes higher and higher.

B.The sea water become warmer and warmer.

C.The edges of the ice sheet become sharper and sharper.

D.The shape of the land where they lie is like a bowl.

3.What's the function of the“mushroom cap”？

A.Stop the sea water warming too fast.

B.Keep the glaciers from moving to the east.

C.Prevent the ocean arriving in the edges of the“bowl”.

D.Protect the glaciers being damaged by

human being.

4.What is the purpose of this text？

A.To introduce a natural phenomenon.

B.To encourage people to visit the East Antarctic glaciers.

C.To urge the government to save the East Antarctic glaciers.

D.To warn people that the East Antarctic glaciers are in danger.

Language study

Vocabulary

1.lead to導(dǎo)致

2.lock up關(guān)起來

3.cause damage造成破壞

4.lie in在于

5.run out跑出去

6.under the bottom of在……的底部

Difficult sentence

過去分詞作條件狀語

If_______（melt） fully，the complete melting of the West Antarctic glaciers，would cause more damage.

翻譯：______________________________________________________________

【點(diǎn)石成金】句中所缺的部分應(yīng)該是非謂語部分，且非謂語動詞與其邏輯主語the complete melting of the West Antarctic glaciers是被動關(guān)系，所以應(yīng)用過去分詞形式。