A.To produce more seeds.
B.To move northward.
C.To respond to the climate change.
D.To protect themselves from the cold wind.
3.What can be inferred from the last paragraph?
A.New trees can trap the snow,which may make the soil colder.
B.The trapped snow prevents new trees from producing more seeds.
C.New trees can make the surrounding air warmer.
D.New trees can bring more food and shelter to local animals.
4.The passage is most probably taken from ________.
A.a science report
B.a health report
C.a fashion magazine
D.a children’s magazine
【语篇解读】 本文是一篇科研报告,主要研究了气温升高对北极圈植物的影响。
1.解析:选B。根据第二段的第二句“Across the Arctic,temperatures are rising faster than anywhere else in the world”以及本段的整体内容可知,不断上升的气温是北极圈树木北移的主要原因,即B项正确。
2.解析:选D。根据画线词前的“Trees growing along the tree line must protect themselves from the cold wind”可知,画线词this指代的是本句中的“protect themselves from the cold wind”,即D项正确。
3.解析:选C。根据最后一段中的“New trees will provide shelters for some snow.Keeping
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