As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. The question everyone asks is why anyone would want to clone flies in the first place. She hopes that the insects , which are very easy to experiment with , will help to adjust the cloning process in other animals and even in humans, where the technique is being researched to aid production of therapeutic (治療的) stem cells.
In cloning, the DNA-containing nucleus of an adult cell is injected into an egg whose own nucleus(細胞核) has been removed. At the moment, the majority of cloned mice, sheep and other animals die before birth. It is thought this is because the adult DNA is not properly ‘reprogrammed’.
Using flies, researchers might discover genes that are important for this reprogramming, and that have matches in other animals. That is because it is relatively easy in flies to knock out the function of a single gene and then attempt cloning with these cells, which will test whether that gene is important. If such genes are confirmed, then in theory cloned mammalian embryos(晶胚) might be grown in selected solutions that change the activity of those genes to improve the technique’s success rate. Although some groups have attempted to clone insects before, Lloyd says this is the first time it has been successful. The team used a slight difference on the standard cloning process: they transferred nuclei taken from embryos rather than fully-grown adult cells. They sucked several nuclei (pl)out of developing fly embryos, and injected them into a fertilized(已受精的) fly egg. From over 800 early attempts, they cloned five adult insects, the group reports in the journal Genetics.
【小題1】The best title of this passage probably is _______.
| A．The importance of clone |
| B．First insects are cloned |
| C．The disagreement in clone |
| D．The advantages of clone |
| A．there are fewer and fewer flies in the world |
| B．flies are easy to find and cheap to use |
| C．they can gain some experience before cloning other animals |
| D．it is safe to clone flies |
| A．the difference of other animals’ genes |
| B．the improper technique of clone |
| C．the complex of other animals |
| D．the improper rearrange of the adult gene |
| A．the clone of insects before used grown-up cells |
| B．the clone of insects were never experimented before |
| C．this time scientists cloned flies successfully and easily |
| D．based on this success, other animals will be cloned in large quantities. |
愉快的寒假南京出版社系列答案科目：高中英語 來源：湖北省黃岡中學2010屆高三5月份第一次模擬考試英語試題(A卷) 題型：050
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科目：高中英語 來源：湖北省黃岡中學2010屆高三5月份第一次模擬考試英語試題(B卷) 題型：050
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科目：高中英語 來源：2011年普通高校招生考試浙江卷英語 題型：050
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科目：高中英語 來源：遼寧省撫順二中2012屆高三第一次月考英語試題 題型：053
根據短文內容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。
US musician and poct Gil Scott-Heron, often called the Godfather of Rap, has died in a New York hospital 62． 1
Scott-Heron was born in Chicago in 1949－the son of a former Britain football player． 2
Scott-Heron’s material covered soul, jazz, blues and the spoken word．His 1970s work heavily influenced the US hip-hop and rap scenes．
3 But the artist himself refused this title．“If ther was any individual initiative that I was responsible for, it might have been that there was music in certain poems of mine, with complete progression and repeating “hooks”． 4 ” Soott-Heron wrote in the introduction to his 1990 Now and Then collection of poems．Scott-Heron’s music and poetry showed his ddep interest in justice and civil rights, and he complained against the consumer society of the 1970s and 80s as well as the development of muclear technology．He was among the first artists to use h is music to attack the apartheid(種族隔離)in South Africa, long before the issue became the focus of a popular global campaign． 5 One of his most famous pieces was The Revolution Will Not Be Televised．In this piece, he criticized the role of race in the mass media and advertising age．
But in a 1998 interview with the Chicago Tribune, Scott-Heron wrned against focusing on the political aspect of his work．“If you only focus on the political aspects of our work, you change us．We’ve done 20 albums and not all of the songs on them are political．” He said．
A．But I don’t like football in Britain．
B．His work had a strong political element．
C．He grew up in Tennessee before moving to New York．
D．Scott was so crazy about politics that all of his songs are political．
E．This made them more like songs than just recitations with percussion．
F．The cause of his death is not clear, but he is believed to have become ill after returning from a visit to Europe．
G．The pioneering style he developed while working with Jackson, mixing minimalist percussion with poetry, meant that Scott-Heron was often described as the Godfather of rap．
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科目：高中英語 來源：2010年高考英語試題分類匯編--特殊句式 題型：閱讀理解
Every day we experiencc one of the wonders of the world around us without even realizing it It is not the amszing complexity of television. Nor the impressive tcchnology of transport The universal wonder we share and
Experience is our ability to make noises with our mouths, and so transmit ideas and thoughts to each other’s minds. This ability comes so naturally that tend to forget what a miracle（奇跡）it is.
Obviously, the ability to talk is something that marks humans off from animals. Of course, some animals have powers just as amazing. Birds can fly thousands of miles by observing positions of the stars in the sky in relation to the time of day and year. In Nature’s went show, humans are a species of animal that have deve pod their own special act. If we reduce it to basie ferms, it’s a ability for communicating information to ther by varying sounds we make as we breathe out.
Not the to don’t have other powers of communication. Our facia. expressions convey our emotions, such as anger, or jout or disappointment. The way we hold our beads can indicate to others whether we are happy or sad. This is so-called “body language”. Bristling(直立的)fur is an unmistakable warning of attack among many animals. Similarly, the bowed bead or drooping tail shows a readiness to take second place in any animal gathering.
Such a means of communication is a basic mechanism that animals, including human beings, instinctively acquire and display. Is the ability to speak just another sort of instinct? If so, how did human beings acquire this amazing skill? Biologists can readily indicate that particular area of our brain where speech mechanisms function, but this doesn’t tell us how that part of our bodies originated in our biological history.
1.According to the passage, the wonder we take for granted is_________.
A.our ability to use language
B.the miracle of technology
C.the amazing power of nature
D.our ability to make noises with mouth
2.What feature of “body language”mentioned in the passage is common to both humans and animals?
A.Lifting beads when sad.
B.Keeping long faces when angry.
C.Bristling hair when ready to attack.
D.Bowing heads when willing to obey.
3.What can be inferred from Paragraph 3?
A.Body language is unique to humans.
B.Animals express emotions just as humans do.
C.Humans have other powers of communication.
D.Humans are no different from animals to some degree.
4.This pastge is mainly about________________.
A.the development of body language
B.the special role humans play in nature
C.the power to convey information to others
D.the difference between humans and animals in language use
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