Some trees act as natural fertilizers.They take nitrogen(氮气) out of the air and put it in the soil.Scientists at the Center say the use of fertilizer trees can reduce the need for chemical nitrogen by up to threefourths.Trees also capture carbon dioxide,a gas linked to climate change.
1.Through the study,the researchers found that
.
A.there are more trees on farmlands than expected
B.fewer trees are being cut in developing countries
C.most farmers still don’t realize the value of trees
D.trees play a key role in preventing climate change
答案 A
解析 推理判断题。根据前两段可推知,该研究发现,农田的林木覆盖率超过了人们的预期。
2.How did the researchers feel about their findings?
A.Disappointed.
B.Surprised.
C.Puzzled.
D.Satisfied.
答案 B
解析 推理判断题。研究发现,农田的林木覆盖率比以前评估的要高出许多,这令研究人员感到非常意外。
3.Which of the following has the least tree cover?
A.Southeast Asia.
B.West Asia.
C.South America.
D.Africa south of the Sahara.
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