4．Scientists in Argentina have created the world's first cow to own two human genes that will enable it to produce human-like milk，which is matchless up to now．It is a breakthrough in the area of clone．
Genetic engineering was used to introduce the"mothers'milk"genes into the animal before birth，according to the National Institute of Agribusiness Technology in Buenos Aires．
As an adult，the cloned cow"will produce milk that is similar to humans"in what will prove"a development of great importance for the nutrition of infants"，it said in a statement．
"The cloned cow，named Rosita ISA，is the first one born in the world that owns two human genes that contain the proteins present in human milk，"the statement said．
In April，scientists in China published details of research showing that they had created GM Holstein dairy cows which produced milk containing proteins found in human breast milk．
But the Argentine team says the Chinese only introduced one human gene，whereas their research involved two genes meaning the milk will more closely resemble that of humans．
Rosita ISA was born on April 6and was delivered by Caesarean section because she weighed around 100pounds，roughly twice the normal weight of Jersey cows．
Adrian Mutto，from the National University of San Martin said"Our goal was to raise nutritional value of cows'milk by adding two human genes，the protein lactoferrin and lysozyme，which can provide newly-born babies with anti-bacterial and anti-viral protection．"
Cristina Kirchner，President of Argentina，said that the scientific institute"makes all proud．"She also revealed that she had rejected the"honor"of having the cow named after her．"They came to tell me that the name is Cristina，but what woman would like to have a cow named after her？It appeared to me to be more appropriate to call it Rosita．"
28．What can we know about Rosita ISA according to the passage？D
A．It is as heavy as Jersey cows．
B．It is the first cow with a human gene．
C．Its milk has the same proteins as human breast milk．
D．Its milk has larger nutritional value than others'．
29．Lactoferrin and lysozyme in milkA．
A．a(chǎn)re good for babies'health
B．help provide more milk from cow
C．can increase the production of milk
D．can offer more proteins in cow milk
30．We can infer from the last paragraph thatB．
A．it is hard to name the cow
B．honorable as it is，no women like the cow named after them
C．the president wants the cow named after her
D．Cristina Kirchner objects to creating the cloned cow
31．What would be the best title of the passage？C
A．Scientists in Argentina could produce human milk
B．The cloned cow would bring about benefits
C．Scientists create cow that produces"human"milk
D．How was the cloned cow born？
分析 本文主要講述了科學(xué)家通過植入人類基因，克隆出了能產(chǎn)出與母乳相似牛奶的奶牛．這是一個極大的突破．
解答 28．D 細(xì)節(jié)理解題．根據(jù)文章內(nèi)容，The cloned cow，named Rosita ISA，is the first one born in the world that owns two human genes that contain the proteins present in human milk，"the statement said．被克隆出來的這只奶牛名叫 Rosita ISA，它是世界上第一只出生的擁有2類人類基因的奶牛．而這一特點(diǎn)使得它產(chǎn)的奶蘊(yùn)含人類所需的東西，更適宜嬰兒．結(jié)合選項，故選D．
29．A 細(xì)節(jié)理解題．根據(jù)文章內(nèi)容，Our goal was to raise nutritional value of cows'milk by adding two human genes，the protein lactoferrin and lysozyme，which can provide newly-born babies with anti-bacterial and anti-viral protection．"由此可知，乳鐵傳遞蛋白和溶解酵素都可以讓新生兒抵抗病菌，對身體有益，結(jié)合選項，故選A．
30．B 推理判斷題．根據(jù)文章內(nèi)容，She also revealed that she had rejected the"honor"of having the cow named after her．"They came to tell me that the name is Cristina，but what woman would like to have a cow named after her？It appeared to me to be more appropriate to call it Rosita．"由此可知，Cristina Kirchner認(rèn)為克隆奶牛以她的名字命名是一件很恐怖的事情．沒有任何一個女人是會愿意以自己的名字來命名克隆奶牛的．結(jié)合選項，故選B．
31．C 主旨大意題．根據(jù)文章內(nèi)容，本文主要講述了科學(xué)家通過植入人類基因，克隆出了能產(chǎn)出與母乳相似牛奶的奶牛．這是一個極大的突破．結(jié)合選項，故選C．
點(diǎn)評 本文是一個科教類閱讀，題目涉及多道細(xì)節(jié)理解題，做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析，結(jié)合選項選出正確答案．推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．
