13.A.recently        B.a(chǎn)ffects        C.pattern        D.varies      E.movesF.warm          G.regularly       H.special       I.effect       J.evidence
Big climate changes in the last million years might have come from something very small:dust from outer space.Earth changes between ice ages and warm periods in a (n)(36)C that includes several cycles,including a(37)H one that lasts 100,000years.Scientists(38)A suggested this cycle might be due to changes in the inflow of cosmic dust.
The idea is that Earth(39)E above and below the imaginary orbit that runs through the sun and Jupiter,completing a cycle every 100,000years.So maybe it(40)G meets amounts of dust during each cycle that produce the climate trend.
Now there is some(41)J,from ancient cosmic dust near the Azores islands west of Portugal.The large quantity of the dust rises and falls with a wonderful 100,000year cycle during the period 253,000years to 458,000years ago.Periods of more dust are related to(42)F climates.
But that is a long way from showing that the dust(43)B climate.Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler.They say the cosmic dust is so thin that it is hard to see how it could have any climate(44)I.

分析 本文講述了宇宙塵埃對地球氣候變化的影響,這些影響因素目前尚不能確定.

解答 CHAEGJFBI
36.C.pattern模式,考查名詞.根據(jù)句意,地球在冰河時期和暖期之間的模式變化包括幾個周期.故選C.        
37.H.special特殊的,考查形容詞.根據(jù)句意,特殊情況下,這一變化可持續(xù)100000年.故選H.       
38.A.recently最近,考查副詞.根據(jù)文章內(nèi)容可知,科學家是最近才提出這個周期可能是由于宇宙塵埃的流入而變化的.故選A.        
39.E.moves移動,考查動詞.根據(jù)句意,地球在繞太陽和木星運行的假想軌道上、下方移動.故選E.
40.G.regularly經(jīng)常,考查副詞.前面提到,地球會經(jīng)常遇到大量的宇宙塵埃.故選G.       
41.J.evidence證據(jù),考查名詞.根據(jù)后面的"from ancient cosmic dust near the Azores islands west of Portugal.The large quantity of the dust rises and falls with a wonderful 100,000year cycle during the period 253,000years to 458,000years ago"可知,這是在為上面的結(jié)論提供證據(jù).故選J.
42.F.warm溫暖,考查形容詞.更多的灰塵與氣候變暖有關(guān).故選F.
43.B.a(chǎn)ffects影響,考查動詞.根據(jù)后面的"Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler"可知,一些科學家認為,目前尚不清楚宇宙塵埃將如何使氣候變暖,而來自火山的塵埃卻使其更冷.所以這里是說塵埃對氣候的影響.故選B.       
44.I.effect作用,考查名詞.一些人說宇宙塵埃太薄了,很難看出它會對氣候有什么作用.故選I.

點評 本文屬于10選9閱讀題型.該題型選詞填空的選項詞義互不關(guān)聯(lián),詞性也不同,而且還有干擾項,一定要先了解文章大意,帶著文章脈絡去找選項.務必先沉著地把文章讀一遍,尤其注意橫線前后的位置,為尋找正確選項打下鋪墊.通讀時要根據(jù)首段原則以及首末句原則,迅速抓出文章的主題.判定文章主題對于篇章的整體把握具有很大的積極意義.

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