题目内容
8.A team led by a nurseryman (花圃工人) and his sons has raced against time for 20years,using branches from some of the world's biggest and most long-lasting trees to produce clones that could restore ancient forests and help fight climate change.Now comes the most ambitious step of the project:getting the new trees into the ground.Plantings of two dozen clones from California's huge coastal redwoods will take place Monday in seven nations:Australia,New Zealand,Great Britain,Ireland,Canada,Germany and the U.S.
The lab-produced trees are genetic copies of three huge trees that were cut down in northern California more than a century ago.Remarkably,new branches still grow from the stumps (树桩),including one known as the Fieldbrook Stump,which measures 35feet in diameter (直径).It's believed to be about 4,000years old.
"We need to reforest the planet.To do that,it just makes sense to use the largest,oldest trees that ever lived,"said David Milarch,co-founder of the non-profit Archangel Ancient Tree Archive.
Milarch and his sons Jared and Jake,who have a family-owned nursery,became concerned about the condition of the world's forests in the 1990s.They began traveling across the U.S.in search of"champion"trees that have lived hundreds or even thousands of years,believing that better genes make it possible for them to outlive others of their species.Scientific opinion varies on whether that's true,with skeptics saying the survivors may simply have been lucky.
The Archangel team says they've developed several methods of producing genetic copies.They focus on towering sequoias (高耸的水杉)and redwoods,considering them best suited to absorb great amounts of carbon dioxide (CO2),the greenhouse gas primarily responsible for climate change.
The challenge is to find places to put the trees,people to look after them and money to continue the project,Jared Milarch said.The group is funded through donations and doesn't charge for its clones.
"A lot of trees will be planted by a lot of groups on Arbor Day,but 90percent of them will die,"David Milarch said."You can't plant trees and walk away and expect them to take care of themselves."Those receiving Archangel redwoods have promised to care for them properly.
28.According to the text,the clonesC.
A.are rather expensive
B.are based on dead ancient trees
C.have been experimented for 20years
D.have been widely grown across the U.S.
29.To reforest the planet,David Milarch chooses the largest,oldest trees becauseB.
A.they are lucky treesB.they have better genes
C.they are easier to plantD.they look more beautiful.
30.David Milarch's team believes that genetic copies from sequoias and redwoodsA.
A.can take in more greenhouse gases
B.are hard to survive for a long time
C.are likely to cause climate change
D.may be a threat to existing plants
31.What is stressed by David Milarch in the last paragraph?C
A.The need of financial support.
B.The difficulty of finding places.
C.The importance of caring for trees.
D.The challenge of running his group.
分析 本文主要讲述了David Milarch 和其研究团队的人员利用有着好基因的树来克隆新的树以修复森林以及抵御全球变暖.
解答 28.C 细节题.根据文章内容,A team led by a nurseryman (花圃工人) and his sons has raced against time for 20years,using branches from some of the world's biggest and most long-lasting trees to produce clones that could restore ancient forests and help fight climate change.一个由花圃工人和他的儿子带领的团队用来自世界上最大的以及最长的树枝来克隆新的树,以修复古老的森林以及帮助抵御气候变化,该工作已经持续有20年了,结合选项,故选C
29.B 细节题.根据文章内容We need to reforest the planet.To do that,it just makes sense to use the largest,oldest trees that ever lived..believing that better genes make it possible for them to outlive others of their species.由此可知,研究团队使用最大的最好的树是因为它们的基因好,对于克隆出好的树有益处,结合选项,故选B
30.A 细节题.根据文章内容,They focus on towering sequoias (高耸的水杉)and redwoods,considering them best suited to absorb great amounts of carbon dioxide (CO2),the greenhouse gas primarily responsible for climate change.由此可知,David Milarch的团队认为高耸的水杉和红木它们能更好的吸收二氧化碳等温室气体,以抵御全球变暖,结合选项,故选A
31.C 推理题.根据文章内容,."You can't plant trees and walk away and expect them to take care of themselves."Those receiving Archangel redwoods have promised to care for them properly.由此可知,在我们种了树之后,不能对它们放任不管,而是应该精心的护理它们,让它们茁壮的成长,结合选项,故选C
点评 题目涉及多道细节理解题,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据.
- .The train had left early.( )
A. | Don't mention it | B. | I have no idea | ||
C. | Are you kidding me | D. | Just my luck |