Question

2．Do you know about Dolly，a famous sheep？She was created by cloning more than ten years ago in Scotland．Cloning is famous throughout the world．It is an experiment to make an animal that is exactly like its parent．So far，scientists have cloned rabbits，sheep，cows，mice，pigs and some other animals．
But what is used in cloning？It's DNA．There is DNA in most living things，including human beings．Your DNA is the same in every part of your body．For example，your fingernails have the same DNA as your hair．You have your own DNA，which is similar to your parents'，but not exactly the same．However，Dolly's DNA is exactly the same as that of the sheep she was cloned from．
No doubt cloning can help save those animals in danger．And it can also benefit human beings．The cloning technology has been used in human organs．With its help，scientists are able to explore more ways to treat many serious diseases such as heart disease，AIDs and cancer．However，cloning could be used in some ways to harm society．All governments should make laws to make sure it can be used properly．
51．When and where was Dolly created？C
A More than one hundred years ago，in the USA．
B．More than fifty years ago，in Scotland．
C．More than ten years ago，in Scotland．
D．More than fifty years ago，in China．
52．According to the passage，which one hasn't been cloned by scientist？D
A．cows           B．mice         C．rabbits             D．giraffe
53．Which of the following is true according to the passage？C
A Cloning is an experiment to make an animal that is different from its pare nt．
B．Your our fingernails don't have the same DNA as your hair．
C．Your DNA isn't exactly the same as your parents．
D．Cloning won't be used in any ways to harm society．
54 The cloning technologyB
A is not famous throughout the world．
B．has been used in human organs．
C．has been used properly．
D．is useless．
55．The best title for passage isD
A Dolly         B．Society      C．DNA　        D．Cloning．

Answer 1

分析 克隆羊Dolly，是在十幾年前在蘇格蘭克隆的．至今科學(xué)家已經(jīng)克隆了兔子，羊，牛，老鼠和豬其他動(dòng)物．但是怎樣克隆的呢？大部分生物有DNA，包括人，人身體的每個(gè)部分的DNA都是一樣的，你有自己的DNA，和你的父母相似，但不是一樣 的，然而，Dolly的DNA和那個(gè)被克隆的羊的DNA是一樣的．
毫無(wú)疑問(wèn)克隆能幫助拯救那些處于危險(xiǎn)的動(dòng)物，人類也能獲益．克隆技術(shù)已經(jīng)用來(lái)克隆人體器官了，科學(xué)家能開(kāi)發(fā)更多的拯治很多嚴(yán)重疾病的方法，例如心臟病，艾滋和癌癥．然而，克隆也會(huì)有危害，政府應(yīng)該制定法律來(lái)使克隆技術(shù)正確地用．

解答 51．答案：C．細(xì)節(jié)理解題．從文章的第一段She was created by cloning more than ten years ago in Scotland可知是在十幾年前在蘇格蘭克隆的．故選C．
52．答案：D．細(xì)節(jié)理解題．從文中的第一段So far，scientists have cloned rabbits，sheep，cows，mice，pigs and some other animals．可知沒(méi)有克隆長(zhǎng)頸鹿．故選D．
53．答案：C．細(xì)節(jié)理解題．從文中的第二段Dolly's DNA is exactly the same as that of the sheep she was cloned from．可知克隆是和被克隆本身是一樣的DNA故A錯(cuò)，結(jié)合For example，your fingernails have the same DNA as your hair可知你的指甲和頭發(fā)的DNA一樣，故B錯(cuò)，結(jié)合最后一段However，cloning could be used in some ways to harm society可知克隆也會(huì)對(duì)社會(huì)有害，故D錯(cuò)，結(jié)合第二段You have your own DNA，which is similar to your parents'，but not exactly the same可知，你的DNA不完全跟你父母一樣．故選C．
54．答案：B．細(xì)節(jié)理解題．從文中的最后一段The cloning technology has been used in human organs可知，克隆技術(shù)已經(jīng)被使用在人體器官．故選B．
55．答案：D．標(biāo)題判斷題．本篇文章主要介紹說(shuō)明克隆技術(shù)．怎么克隆的，克隆的利弊，故選D．

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