[originaltext]W: Doctor White, we recently learned that a large piece of the La

游客2023-06-30  18

问题  
W: Doctor White, we recently learned that a large piece of the Larsen Ice Shelf in Western Antarctica broke off in early January. Could you please tell us exactly what happened?
M: I’d be happy to. The piece that broke off was over a thousand square miles in area. More recently and quite alarming to scientists is that a forty-mile crack, some 30 feet wide in places has torn through the ice shelf.
W: I understand that the scientific community is quite concerned. What is the significance of these events?
M: Well, some scientists believe that this is a clear sign of global warming. Back in 1978, some American researchers predicted that Antarctica would show early signs of global warming due to the green house effect.
W: But couldn’t crumbling ice shelves also be a result of the unusual weather Antarctica itself has experienced lately?
M: That’s certainly possible, but you’ll have to remember that over the past thousands of years, ice shelves have been through a lot of weather changes without breaking up.
W: I think most people know that if the ice cap over Antarctica melts, the level of the oceans will rise. What sort of impact will this have?
M: Well, the ice shelves currently insulate the Antarctic continent from wind, which slows down the melting. If the winds cause even a tenth of the continent’s ice to melt, the world’s oceans could rise as much as 30 feet.
Questions 8 and 11 are based on the conversation you have just heard.
8. What has broken off in early January?
9. Why are the events important?
10. Why doesn’t the woman believe that weather is responsible for the recent events?
11. What would be the likely result of the melting of the ice cap?

选项 A、An experiment in Antarctica.
B、Part of the Larsen Ice Shelf.
C、Part of the ocean in Antarctica.
D、An expedition in Antarctica.

答案 B

解析 本题考查内容大意。对话的开篇就提到了“Doctor White,we recently learned that a large piece of the Larsen Ice Shelf in Western Antarctica broke off in early January.Could you please tell us exactly what happened?”,由此可知两人的谈话是从最近南极洲西部的Larsen冰架消融开始的,后面则是围绕其原因和影响展开的。因此选项B为正确答案。
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