@Choose the correct answer.
‚X.Polar Bears on Thin Ice Quiz |
|
1. Why are global warming specialists watching the It's a highly sensitive region, and it's being profoundly affected by the@changing ‡A@@@@@. Most scientists view what's happening now in the‡B@@@@@@ as a harbinger of things to come. global warmingF’n‹…‰·’g‰»@scientistsF‰ÈŠwŽÒ@as a harbingerFæ‹ì‚¯ |
|
‡@ | ice |
oil | |
coal mine | |
‡A | ice |
water level | |
climate | |
‡B | South |
Earth | |
Arctic | |
2. Polar bears are strong ‡C@@@@; they
swim across bays or wide leads without hesitation. They can swim for several
hours at a time over long distances. They've been tracked swimming continuously
for ‡D@@@ km.
without hesitationFçSçO‚È‚µ‚Å@continuouslyF˜A‘±‚µ‚Ä |
|
‡C | boxers |
wrestlers | |
swimmers | |
‡D | 10 |
100 | |
500 | |
‚R.Polar bears can live ‡E@@@@ years. |
|
‡E | 10 to 15 |
20 to 30 | |
40 to 50 | |
‚S.The world polar bear population is estimated to be between
‡Findividuals . estimatedF„’è |
|
‡F | 21,000`28,000 |
101,000`108,000 | |
501,000`508,000 | |
‚T.Growing public concern about polar bear hunting and other human
activities in the Arctic, such as oil exploration, led to the First
International Scientific Meeting on the Polar Bear in
‡G@@@. Attending were representatives from all five polar bear countries: concernFŒœ”O@ oil explorationFΖû’Tõ@ Scientific MeetingFŠw‰ï@@@@representaiveF‘ã•\@ international conferencesF‘Û‰ï‹c@@@@@@@@@@@@@@@@@research effortFŒ¤‹†“w—Í @international agreementF‘Û‡ˆÓ |
|
‡G | 1865 |
1965 | |
2005 | |
‡H | conservation |
management | |
breeding | |
‚U.Scientists
predict that
‡I@@@ percent of the summer sea ice that polar bears
depend on for survival could be gone in
20 years, and all of it by 2040. summer seaFŠC•X@survivalF¶‚«Žc‚è |
|
‡I | 40 |
60 | |
80 |
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