本题目来源于试卷: Continuity and Change D.12 Climate Change，类别为 IB生物学
[单选题]
Scientists have been y4sbp l 4)xqpt 03,uxoae0cy -stu8 rx;wrv6k i+h.n,(7qi sfpxgdying the effects of global warming for some time now, and are worrierf8;7ip(i.ns q 6 vxxrgk wh,+d about the thawing of frozen ice and permafrost in the Arctic region. The image above was taken from a helicopter and shows the crack pattern in permafrost.
Which of the following statements best describes the concerns of scientists?
I. There is frozen organic matter in the Arctic which contains ancient bacteria and viruses
II. With the thawing of ice and organic matter, more carbon dioxide will be released into the air
III. The melting of permafrost in the Arctic will cause the release of methane
A. I and II only
B. I, II and III
C. I only
D. II and III only
参考答案: B
本题详细解析:
Dead plants and animals have been frozen in permafrost for millions of years. When permafrost thaws, so will the ancient bacteria and viruses which could infect other organisms (Statement I). The thawing of ice and permafrost will lead to the release of both carbon dioxide (Statement II) and methane (Statement III) from the permafrost. All statements are true. The other choices (Choices A, C and D) do not include all statements.
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