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高中2025届毕业班基础知识滚动测试(一)1英语试题)
30.A They belonged to Amish long ago.BThey changed their language in the end.Chevebeen promoting Dutch culture.DThey used to live in urban communities31.Wemost to the survival of Pennsylvania Dutch?B.The religious ceremonies.A.The living communities.C.The traditions of marriage.D.The high birth rates of babies.Da concerning development,researchers recently documented 75 streams acrossAlask rmote Brooks Range that have turned from clear to an alarming orange color overPermafrost,or permanently frozen ground,acts as a natural barrier,preventing waterthe past decade.fromgoing deeply into the soil and keeping groundwater flowing on shallow layers.Howeversthe Arctic continues to warm at a great rate,this frozen barrier is beginning tothaw(f)allowing water to go deeper into the ground and changing the flow paths andchemistry of the water that eventually makes its way into streams and rivers.The research team,led by ecologist Jonathan O'Donnell,investigated the causes andconsequences of this disturbing trend.By analyzing satellite imagery from the past threedecades,the researchers were able to pinpoint the timing of the color change to within thelast 5-10 years,and that was the period of rapid warming in the region.Water samplescollected from the orange streams revealed significantly lower pH levels and higherconcentrations of sulfate(硫酸盐),iron and some poisonous metals such as zinc andnickel,compared to nearby unimpaired reference streams.The presence of these elementsin the water is consistent with the weathering()of sulfide minerals,which can occurwhen permafrost thaw exposes previously frozen mineral deposits to air and water,allowingchemical reactions to take place.The consequences of this sudden shift in water chemistry are far-reaching andpotentially harmful for the delicate Arctic ecosystem.As the Arctic continues to warm and permafrost thaw speeds up,it is likely that morestreams and rivers will be impacted by the mobilization of iron and poisonous metals.Thisstudy highlights the urgent need for increased monitoring and research to better understandthe extent and long-term consequences of this emerging threat to Arctic ecosystems andthe communities that depend on them.32.What is the second paragraph mainly about concerning permafrost?A.The seriousness of its loss.B.Its influences on nature.C.Its typical distribution.D.The concept of its thaw.国考1号1·7月卷·英语第6页(共10页)
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