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  3. In fact, even without humans, the Earth’s climate changes. Some climate chan

In fact, even without humans, the Earth’s climate changes. Some climate chan

游客2024-02-02  41
问题     In fact, even without humans, the Earth’s climate changes. Some climate change is【C1】______. But, as greenhouse gases are added to the atmosphere, human influence "emerges" from natural variability.
    Droughts, one of the most intensely studied climate events, are a perfect example of a(n) 【C2】______with both natural and human influences. Separating the【C3】______strengths of the influences is a challenge for scientists. However, with the large social and economic costs of droughts, it is a challenge the scientists must【C4】______.
    In a very recent study published in the Journal of Climate, authors Richard Seager and Martin Hoerling cleverly used climate models forced by sea surface temperatures to【C5】______how much of the past century’s North American droughts have been caused by ocean temperatures, natural variability and human influences.
    Droughts can be caused by a(n) 【C6】______of separate or interactional phenomena. At its root, drought results from the low【C7】______of water falling and sometimes higher temperatures(which increase evaporation rates). The beginning of drought can often be linked to variations in ocean temperatures.
    It is also found that the oceans can affect the atmosphere to create conditions that are【C8】______responsible for drought. What’s more, temperature increases【C9】______with human-driven global warming also play a role. This【C10】______agrees with other researchers who have shown that, while human-emitted greenhouse gas warming may not cause a particular drought, it can make drought come on earlier, faster, and harder than it otherwise would.
A)associated
B)attached
C)conclusion
D)conduct
E)distinguish
F)effect
G)natural
H)partly
I)quality
J)quantity
K)relative
L)ridiculous
M)simply
N)undertake
O)variety [br] 【C9】
选项
答案 A
解析 空格位于主语temperature increases之后，该句谓语是play，故应填入动洲过去分词与介词短语with human-driven global warming一起作后置定语。根据句意，与人为造成的全球变暖相联系的温度升高也会引起干旱，故空格处应填入associated“把……联系起来”。associate…with…意为“把……与……相联系”。备选的动词中，虽然attached也意为“使相联系”，但它常与to搭配，故排除。
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