6.The United States government wants to know what the public thinks about its findings on the safety of cloned animals.
The Food and Drug Administration says meat and milk from clones of adult cattle,pigs and goats are safe to eat.An F.D.A.official called them"as safe to eat as the food we eat every day."And when those clones reproduce sexually(有性繁殖),the agency says,their offspring(后代) are safe to eat as well.But research on cloned sheep is limited.So the F.D.A.proposes (提議) that sheep clones not be used for human food.
The United States this year could become the first country to approve the sale of foods from cloned animals.First,however,the public will have ninety days to comment on three proposed documents.On December 28th the F.D.A.released a long report,called a draft risk assessment,along with two policy documents.
The agency says it must receive comments by April second.The F.D.A.seemed ready to act several years ago,but an advisory committee called for more research.
For now,the government will continue to ask producers to honor a request that they not sell foods from cloned animals.
Clones are still rare.They cost a lot and are difficult to produce.
The F.D.A.says most food from cloning is expected to come not from clones themselves,but from their sexually reproduced offspring.It says clones are expected to be used mostly as breeding animals to spread good qualities.
Public opinion studies show most Americans do not like the idea of food from cloned animals.But this research also shows the public knows little about cloning.
Cloning differs from genetic engineering.A cell taken from a so-called donor animals is grown into an embryo(胚胎)in the laboratory.Next,the embryo is placed into the uterus(子宮)of a female animal.If the process is successful,the pregnancy reaches full term and a genetic copy of the donor animal is born.
5.From the passage we know thatA.
A.cloned adult animals are safe to eat except sheep
B.foods from cloned animals are popular in America
C.cloned animals will be easy to produce
D.most foods from cloning is expected to take place of other foods
6.Who believe that foods from cloning are safe to eat?C
A.Critics
B.An advisory committee
C.The F.D.A
D.Most Americans
7.It can be inferred from the last paragraph thatB.
A.cloning has much in common with genetic
B.not every cell taken from a donor animal can grow into a genetic copy
C.the donor animal should be a female one
D.cloned animals grow faster than normal ones
8.The main purpose of the text is toD.
A.tell an interesting story
B.give some advice on foods
C.compare different opinions
D.give a report.
分析 本篇文章是關(guān)于克隆食物的安全問題的報道.
解答 5.A,細(xì)節(jié)理解題,根據(jù)句子The Food and Drug Administration says meat and milk from clones of adult cattle,pigs and goats are safe to eat和But research on cloned sheep is limited.So the F.D.A.proposes (提議) that sheep clones not be used for human food.可知,克隆成年的動物是可以食用的,除了羊,故答案為A.
6.C,細(xì)節(jié)理解題,根據(jù)句子"The Food and Drug Administration says meat and milk from clones of adult cattle,pigs and goats are safe to eat.…"可知美國食品和藥品管理局告訴公眾,克隆動物制品可以安全食用,故答案為C.
7.B,推理判斷題,從最后一段"If the process is successful,the pregnancy reaches full term and a genetic copy of the donor animal is born."可知"如果這個過程成功的話",懷孕的動物的孕期就會自然成熟.由此判斷選B,這個過程也有失敗的時候.
8.D,主旨大意題,本篇文章是關(guān)于克隆食物的安全問題的報道,故答案為D.
點評 解答任務(wù)型閱讀理解題,首先對原文材料迅速瀏覽,掌握全文的主旨大意.因為閱讀理解題一般沒有標(biāo)題,所以,速讀全文,抓住中心主旨很有必要,在速讀的過程中,應(yīng)盡可能多地捕獲信息材料.其次,細(xì)讀題材,各個擊破.掌握全文的大意之后,細(xì)細(xì)閱讀每篇材料后的問題,弄清每題要求后,帶著問題,再回到原文中去尋找、捕獲有關(guān)信息.最后,要善于抓住每段的主題句,閱讀時,要有較強(qiáng)的針對性.對于捕獲到的信息,要做認(rèn)真分析,仔細(xì)推敲,理解透徹,只有這樣,針對題目要求,才能做到穩(wěn)、準(zhǔn).