點擊查看：2015年6月英語四級仔細閱讀練習(xí)及答案解析匯總

　　Section C

　　Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

　　根據(jù)以下資料，回答56-60題：

　　Passage One

　　Quesaons 56 to 60 are based on thefollowingpassage.

　　The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have“passed the point of no return，”according to new work by two separate teams of scientists.

　　The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.

　　“It really is an amazingly distressing situation，”says Pennsylvania State University glaciologist(冰川學(xué)家)Sridhar Anandakrishnan，who was not affiliated with either study.“This is a huge part of West Antarctica.and it seems to have been kicked over the edge.”

　　The researchers say the fate of the glaciers is almost certainly beyond hope.

　　One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.

　　A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.

　　“The retreat of ice in that area is unstoppable，”Rignot said at a briefing Monday,adding that the glaciers have“passed the point of no return.”

　　Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes(浮冰).The data show the glaciers are stretching out，thinning and shrinking in volume.They’re A.so flowing faster from the continent’s interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.

　　At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers’retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.

　　A report in this week’s Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn’t specify the amount of sea-level rise associated with nlwaites’demise.

　　56、 Who contributed to the Monday research?

　　A.The two separate teams of scientists.

　　B.Scientists at the University of Washington，of California.Irvine and NASA's Lab.

　　C.Scientists at Pennsylvania State University.

　　D.Several glaciologists.

　　57、 What is the current situation of Thwaites Glacier?

　　A.It is on the edge of inevitable collapsing.

　　B.It has completely gone.

　　C.It is becoming 1arger in volume.

　　D.It is flowing to the sea.

　　58、 What are the problems ofAntarcfic glaciers?

　　A.They are becoming smaller in volume.

　　B.They are flowing at a faster speed to the sea.

　　C.They ale pouring more and mole ice into the sea.

　　D.All the above.

　　59、 What does the report in Geophysical Research Letters show?

　　A.The ice poured into the sea is being melted from above.

　　B.The melting of the ice can result in the vicious cycle of the glaciers’melting.

　　C.The local terrain has nothing to do with glacier retreat.

　　D.Warm ocean water can slow down the glaciers’melting.

　　60、 According to the passage，what do the words“passed the point of no return”mean(Line 2，Para.1)?

　　A.The glaciers can’t flow back to the continents.

　　B.The glaciers are different from what they were years ago.

　　C.The melting of glaciers has come to the stage of being inevitable.

　　D.The speed of glacier melting can’t return to the former one.

　　56.Who contributed to the Monday research?周一的報告是誰發(fā)的?

　　A.The two separate teams ofscientists.兩組不同的科學(xué)家。

　　B.Scientists at the University of Washington，of California-Irvine and NASA’s Lab.來自華盛頓大學(xué)、加州大學(xué)歐文分校以及NASA實驗室的科學(xué)家。

　　C.Scientists at Pennsylvania State University.賓州州立大學(xué)的科學(xué)家。

　　D.Several glaciologists.幾個冰川學(xué)家。

　　57.What is the current situation ofThwaites Glacier?特懷特冰川目前是什么狀況?

　　A.It is on the edge ofinevitable collapsing.處于無法避免的崩塌的邊緣。

　　B.It has completely gone.已完全消失。

　　C.It is becoming larger in volume.體積正在變大。

　　D.It is flowing to the sea.正在漂向大海。

　　58.What are the problems ofAntarctic glaciers?南極冰川正面臨什么問題?

　　A.They are becoming smaller in volume.體積在變小。

　　B.They are flowing at a faster speed to the sea.正以更快的速度漂向大海。

　　C.They are pouring more and more ice into the sea.正在向大海投入越來越多的冰。

　　D.All the above.上面所有。

　　59.What does the report in Geophysical Research Letters show?((地理學(xué)雜志》的報告發(fā)現(xiàn)了什么?

　　A.The ice poured into the sea is being melted from above.投入大海的冰塊正在從上面開始融化。

　　B.The melting ofthe ice can result in the vicious cycle ofthe glaciers’melting.冰塊融化會引起冰川消融的惡性循環(huán)。

　　C.The local terrain has nothing to do with glacier retreat.當?shù)氐牡匦闻c冰川消退無關(guān)。

　　D.Warm ocean water Can slow down the glaciers’melting.暖海水可以減緩冰川融化的速度。

　　60.According to the passage，what do the words“passed the point of no return”mean(Line 2，Para.1)?根據(jù)這篇文章，“passed the point ofno return”是什么意思(第一段第二行)?

　　A.The glaciers can’t flow back to the continents.冰川不能漂回大陸。

　　B.The glaciers are different from what they were years ago.冰川與數(shù)年前的樣子不一樣了。

　　C.The melting ofglaciers has come to the stage ofbeing inevitable.冰川消融已經(jīng)到了無法避免的地步。

　　D.The speed ofglacier melting Can’t return to the former one.冰川消融的速度無法回到從前了。

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