阅读理解 Due to climate change, Arcticice is breaking up earlier in the spring, and its area is decreasing．This is creating problems for polar bears that make their homes off northern Alaska and in Huds 题目和参考答案——青夏教育精英家教网—

阅读理解

　　Due to climate change, Arctic(北极的)ice is breaking up earlier in the spring, and its area is decreasing．This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay．

　　Polar bears off Alaska normally hunt and raise their young on ice sheets(大冰原)that float on the ocean．But as the ice has melted, the polar bears have been forced to spend more time on land．There, they have begun to frequent(常去)beaches, feeding on the remains of whales caught by native hunters．For polar bears, this food is less nutritious(有营养的)than seals that they normally catch on ice sheets．The shrinking(减少)ice has also forced more polar bears into the ocean．In the past, they only had to swim short distances between ice sheets．But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean．This poses(造成)a severe danger during bad weather, and an increasing number of drowned(溺水的)polar bears have been observed．

　　In Hudson Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago．Polar bears on Hudson Bay fast(绝食)during the summer, waiting for ice to form in the fall to hunt．Every year, the summer gets longer, and the bears get skinnier．Over the past 25 years, the average weight of the female bears has dropped 68 kg．This loss affects their ability to reproduce, and already the number of births has dropped 15 percent．Unless the bears can learn to survive these climate changes, these large animals of the ice may one day disappear．

(1)

What is Arctic ice doing earlier each year?
[　　]
A．	It’s freezing．
B．	It’s hardening．
C．	It’s melting．
D．	It’s expanding．

(2)

What is true of polar bears that are spending more time on land in Alaska?
[　　]
A．	Their young are dying．
B．	Their diet is changing．
C．	Their health is improving．
D．	Their families are growing．

(3)

What do polar bears in Hudson Bay do during the summer?
[　　]
A．	They claim territory(地域)．
B．	They protect mates．
C．	They hunt animals．
D．	They stop feeding．

(4)

What does the writer imply about female polar bears in Hudson Bay?
[　　]
A．	They are having fewer young now．
B．	They suffer from various sickness．
C．	They don’t need stronger protection．
D．	They can’t find enough good males．

(5)

In which publication would you most likely find this passage?
[　　]
A．	Medical news．
B．	Society Today．
C．	Wildlife Journal．
D．	Design Magazine．

答案：1．C;2．B;3．D;4．A;5．C;

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