B.The ocean food chain breaks due to the melting of icebergs.
C.Floating icebergs help shelter bottom-living ocean creatures.
D.Global warming has kept bringing icebergs into being.
答案 D
.From the passage we can conclude that icebergs can ________.
A.preserve ocean creatures
B.carry ocean nutrients away
C.create a warm polar environment
D.keep sea animals away from polar seas
答案 A
4.What is the author's attitude toward icebergs?
A.Cautious.
B.Objective.
C.Doubtful.
D.Disapproving.
答案 B
阅读理解。
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tall you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people - half of them pet owners –while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did
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