欧美性xxxx69,国产精品男人爽免费视频1,国产精品10p综合二区

閱讀理解

　　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．

(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

(2)

The scientists cloned flies because ________．
[　　]
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 cline flies

(3)

The failure of most cloned animals is due to ________．
[　　]
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

(4)

It can be inferred from the last paragraph that ________．
[　　]
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．

答案：1．B;2．C;3．D;4．A;

練習冊系列答案

年級	高中課程	年級	初中課程
高一	高一免費課程推薦！	初一	初一免費課程推薦！
高二	高二免費課程推薦！	初二	初二免費課程推薦！
高三	高三免費課程推薦！	初三	初三免費課程推薦！
更多初中、高中輔導課程推薦,點擊進入>>

相關習題

科目：高中英語 來源：設計必修二英語北師版北師版 題型：050

閱讀理解

　　Israeli paintings－Israeli artist Menashe Kadishman will hold a personal show named “Flock of Sheep” from November 26 to December 20 at the China National Art Museum．On show are 550 colorful oil paintings of sheep heads．

　　His works have been on show in the Metropolitan Museum in New York and Tate Gallery in London over the past 30 years．

　　Time：9∶00 a. m.－4∶00 p. m., November 26-December 20．

　　Place：China National Art Museum,1 Wusi Street, Dongcheng District, Beijing．

　　Tel：6401-2252

　　Russia Ballet－The Kremlin Ballet from Russia will perform two immortal classical ballets－“Swiss Lake” and “The Nutcracker”－at the Beijing Beizhan Theatre．Set up in 1990, the theatre has a number of first-class ballet dancers with pride．Most of their performances are classical．

　　Time：7∶15 p. m., December 5 and 6(“Swan Lake”); 7∶15 p. m., December 7(“Nutcracker”)

　　Place：Beizhan Theatre, Xiwai Street, Xicheng District, Beijing．

　　Tel：6605-3388

　　Folk concert－The Central Conservatory of Music(音樂學院)will hold a folk concert in memory of the late musician Situ Huacheng．

　　On the programme are many popular folks such as “Moon Night on the Bamboo Tower” “Celebrating Harvest” “Deep and Lasting Friendship” “Golden Snake Dancers Wildly”, and “Children?s Holiday”．

　　Time：7∶30 p. m., November 25．

　　Place：Beijing Concert Hall, 1 Beixinhua Street．

　　Tel：6605-5812

(1)

If a child is very fond of dancing, his parent should take him to ________．
[　　]
A．	China National Art Museum
B．	Beizhan Theatre
C．	Beijing Concert Hall
D．	1 Wusi Street

(2)

Menashe Kadishman is well known for painting ________．
[　　]
A．	deer
B．	birds
C．	sheep
D．	flowers

(3)

Which of the following is TRUE?
[　　]
A．	The folk concert will last three days．
B．	The ballet “The Nutcracker” will be put on once．
C．	The Israeli paintings will be on show for a month．
D．	China National Art Museum lies in Xicheng District．

(4)

If you dial the telephone number 6605-3388 on Dec．8, you can ________．
[　　]
A．	go to the folk concert
B．	visit the Art Museum
C．	watch the ballet
D．	none of the above

查看答案和解析>>

科目：高中英語 來源：福建省泉州五中2007－2008年高考模擬考試　英語試題 題型：050

閱讀理解

ISC(HS)Reference No．S006864　　　　　　　　　　　　New South Wales

Student Date of Birth：19/08/1988　　　Department of Education and Training

　　　　　　　　　　　　　　　　　　　　　International Students Centre

Hong Xue　　　　　　　　　　　　　　827-839 George Street PO Box 707

60 Waratah Street　　　　　　　　　　　　　　　　Broadway NSW 21007

Croydon Park NSW 2133　　　　　　　Phone：(612)9217 4801 1300 302 456

　　　　　　　　　　　　　　　　　　　　　　　　Fax：(612)9212 6721

　　　　　　　　　　　　　　　　　http：//www.tafensw.edu.au/international/

WARNING LETTER

Dear Hong Xue,

　　As you are aware, your student visa regulations set out a number of conditions applying to your visa．It has come to our attention that you are failing to meet the following conditions：You must maintain accommodation, support and general welfare arrangements that have been approved by your education provider if you：

　　●have not turned 18; and

　　●are not staying in Australia with：

　　－a parent

　　－a custodian(監護人); or

　　－a relative who has been nominated(指定)by your parent or a custodian, is aged at least 21 and is of good character．

　　Note：You must not change those arrangements without the written approval of your education provider．

　　You must obey the following rules：

　　1．During term time you must：

　　a)remain in your homestay during the school term;

　　b)come home every night; and

　　c)inform your guardian at all times of your whereabouts．

　　2．On weekends you must：

　　a)have your guardian's permission to stay with friends; and

　　b)inform your guardian of the name, address and phone numbers of people you are visiting．

　　3．You must return your guardian's telephone calls．

　　This will be your only warning．If you continue to breach(違反)your student visa regulations we will report you to the Department of Immigration and Multicultural and Indigenous Affairs．Such action may lead to the cancellation(取消)of your student visa．Please contact me on(612)9217 4801 or fax(612)9212 6721 if you have questions about your enrolment．

　　　　　　　　　　　　　　　　　　　Yours sincerely

　　　　　　　　　　　　　　　　　　　Tracey Carlon

　　　　　　　　　　　　　　　　　　　Student Advisor

　　　　　　　　　　　　　　　　　　　International Students Centre

NSW Department of Education and Training

(1)

What's the purpose of writing this letter?
[　　]
A．	To remind the recipient of the conditions for applying for a student visa．
B．	To warn the recipient not to do anything against his student visa regulations again．
C．	To tell the recipient how to contact his student advisor．
D．	To inform the recipient of the student visa regulations．

(2)

What can be learned about the recipient from this letter?
[　　]
A．	He is under 18 and studies in Australia with his parents．
B．	He is required to come home every night according to the rules．
C．	He can stay with his friends on weekends if permitted．
D．	His student Visa has been cancelled．

(3)

To which address should the recipient reply if he feels like answering the letter?
[　　]
A．	Hong Xue at 60 Waratah Street, Croydon Park NSW 2133．
B．	Tracey Carlon at the Department of Immigration and Multicultural and Indigenous Affairs．
C．	Hong Xue at NSW Department of Education and Training．
D．	Tracey Carlon at 827-839 George Street, PO Box 707, Broadway NSW 21007．

查看答案和解析>>

科目：高中英語 來源：安徽省蚌埠鐵中2012屆高三上學期期中考試英語試題 題型：050

閱讀理解

　　Watching 3D films such as Avatar could give some viewers headaches, experts have warned．

　　The success of James Cameron's science-fiction blockbuster(賣座的大片), which has already taken more than ＄1 billion(￡600 million)at the box office, is fuelling a surge in popularity for three-dimensional movies and new 3D television sets．

　　But prolonged viewing may result in an aching head, according to Dr Michael Rosenberg, an ophthalmology(眼科學)professor at Northwestern University Feinberg School of Medicine in Chicago．

　　He said："There are a lot of people walking around with very minor eye problems, for example a minor muscle imbalance, which under normal circumstances the brain deals with naturally．"

　　Watching a 3D movie confronts viewers with an entirely new sensory experience．"That translates into greater mental effort, making it easier to get a headache," he said．

　　Dr Deborah Friedman, a professor of ophthalmology and neurology(神經學)at the University of Rochester Medical Center in New York, said："If your eyes are a little off to begin with then it's really throwing a whole degree of effort that your brain now needs to exert．This disparity for some people will give them a headache．"

　　Experts say there are no studies tracking how common it is to get a headache after watching a 3D film．

　　Rick Heineman, a spokesman for RealD, which provides 3D equipment to cinemas, said headaches and nausea were the main reasons 3D technology never took off before．

　　But he said new digital technology addresses many of the problems that had previously caused sore heads．

(1)

What can we learn from what Dr Michael Rosenberg said?
[　　]
A．	A lot of people prefer walking around with very minor eye problems to sitting silently watching 3D films．
B．	The brain can deal with very minor eye problems under normal circumstances naturally．
C．	A lot of people haven’t got very minor eye problems when viewing films under normal circumstances．
D．	People come into very minor eye problems and a minor muscle imbalance when watching 3D films．

(2)

What does the underlined word “prolonged” in the 3rd paragraph mean?
[　　]
A．	continuous
B．	constant
C．	regular
D．	long-time

(3)

According to the passage, which of the following is TRUE?
[　　]
A．	It has taken less than ＄1 billion to make the popularity of three-dimensional movies and new 3D television sets．
B．	Watching a 3D movie leaves viewers confronted with an entirely new sensory experience．
C．	There are studies tracking how common it is to get a headache after watching a 3D film．
D．	Rick Heineman said that 3D technology would never take off headaches and nausea in future．

(4)

What’s the main idea of the passage?
[　　]
A．	The expert warns the readers not to watch 3D films because of resulting in an aching head．
B．	New digital technology gives viewers headaches and eye problems．
C．	The experts are studying how to get rid of many of the problems that have previously caused sore heads．
D．	Viewing 3D films may result in some side-effect problems such as headaches．

查看答案和解析>>

科目：高中英語 來源：浙江省嘉興一中2010－2011學年高二10月月考英語試題 題型：054

閱讀理解

　　Once upon a time the colors of the world started to quarrel．Green said,“Clearly I am the most important．I am the sign of life and hope．I was chosen for grass, trees and leaves．Without me, all animals would 　　1　　．”

　　Blue interrupted,“You only think about the 　　2　　, but consider the sky and the sea．　　3　　 the water that is the basis of life and drawn up by the clouds from the deep sea．Without my peace, you would all be 　　4　　．”

　　Yellow chuckled(笑道),“You are all so serious．I bring laughter, fun, and 　　5　　 into the world．”

　　Orange started next to blow her trumpet,“I am the color of health and strength．I may be 　　6　　, but I am precious for I serve the needs of human life．When I fill the sky 　　7　　, my beauty is so striking that no one gives another 　　8　　 to any of you．”

　　Red could stand it 　　9　　 and he shouted out,“I am the ruler of all of you．I am the color of danger and of bravery．I am willing to 　　10　　 truth．I am also the color of passion and of love．”

　　Then came Purple and Indigo(深藍)…．

　　The colors went on boasting, each convinced of his or her own 　　11　　．Their quarreling became louder and louder．Suddenly there was a startling flash of bright lightening thunder．Rain started to pour down 　　12　　．The colors crouched(蜷縮)down 　　13　　, drawing close to one another for comfort．

　　In the midst of the clamor(叫嚷), rain began to speak,“You foolish colors, fighting 　　14　　yourselves, each trying to dominate　　15　　．Don't you know that you were each made for a special purpose, 　　16　　?Join hands with 　　17　　 and come to me．”

　　Doing as they were told, the colors 　　18　　 and joined hands．They formed a colorful rainbow．From then on, whenever a good rain 　　19　　 the world, a rainbow appears in the sky．They remember to 　　20　　 one another．

(1)


[　　]
A．	stay
B．	leave
C．	go out
D．	die

(2)


[　　]
A．	earth
B．	moon
C．	star
D．	sun

(3)


[　　]
A．	That is
B．	I am
C．	It is
D．	This is

(4)


[　　]
A．	anything
B．	nothing
C．	something
D．	everything

(5)


[　　]
A．	warmth
B．	sadness
C．	depression
D．	anxiety

(6)


[　　]
A．	usual
B．	normal
C．	common
D．	scarce

(7)


[　　]
A．	at midnight
B．	at noon or at night
C．	at sunrise or sunset
D．	during the day

(8)


[　　]
A．	gift
B．	honor
C．	thought
D．	respect

(9)


[　　]
A．	for more
B．	any more
C．	very much
D．	no longer

(10)


[　　]
A．	turn to
B．	fight for
C．	struggle with
D．	bend over

(11)


[　　]
A．	superiority
B．	disadvantages
C．	inferiority
D．	weakness

(12)


[　　]
A．	gently
B．	quietly
C．	violently
D．	peacefully

(13)


[　　]
A．	with care
B．	in fear
C．	by chance
D．	on purpose

(14)


[　　]
A．	amongst
B．	by
C．	for
D．	against

(15)


[　　]
A．	others
B．	themselves
C．	the other
D．	the rest

(16)


[　　]
A．	equal and simple
B．	ordinary and similar
C．	more or less
D．	unique and different

(17)


[　　]
A．	each other
B．	me
C．	one another
D．	them

(18)


[　　]
A．	combined
B．	separated
C．	united
D．	divided

(19)


[　　]
A．	cleans
B．	washes
C．	brightens
D．	dampens

(20)


[　　]
A．	appreciate
B．	quarrel with
C．	ignore
D．	praise

查看答案和解析>>

科目：高中英語 來源：0103 月考題 題型：閱讀理解

閱讀理解。

     CBC is a famous air company which has over twenty planes carrying passengers and goods, flying
along 12 fixed lines all over the world. Its service is very good but some passengers are still not satisfied
with it and that is why in 1998 and 1999 the company received letters of complaints(投訴) from consumers
or passengers who pointed out over a dozen kinds of problems which are divided in groups in the following
table. This division is called Category. Problems that appear when the plane is flying are Flight problems.
Those about passengers' things carried by the plane are Baggage problems. Customer service refers to
service work which passengers are not satisfied with. Over sales of seats are about the fact that more seats
are sold and as a result the plane is too crowded to be safe. Refund problems appear when passengers fail
to receive the money paid to them because of what they have lost. Fares are problems about the price of
tickets. Reservations are problems that appear when passengers could not get the tickets they have already
booked. Tours are problems about the passengers'traveling by air or hotel problems. Advertising is what the
passengers think about advertisement on the plane. Credit problems are about the use of credit cards. 　　
          ONSUMER COMPLAINTS RECEIVED BY THE CBC 　　
Category　　　　　　　　　　　　　　　　 1998　　　　1999 　　　　　　　　　　　　　　　　　　　　　                                                                       (percent)　 (percent) 　　
Flight problems…………………………………   20.0%　　　 22.1% 　　
Baggage ………………………………………… 18.3%　　　21.8% 　　
Customer service ………………………………   13.1%　　　 11.3% 　　
Over sales of seats ……………………………… 10.5%　　　11.8% 　　
Refund problems ………………………………   10.1%　　　  8.1% 　　
Fares ……………………………………………   6.4%　　　   6.0% 　　
Reservations and ticketing ……………………… 5.8%　　　 5.6% 　　
Tours …………………………………………… 3.3%　　　　2.3% 　　
Smoking ………………………………………… 3.2%　　　   2.9% 　　
Advertising ……………………………………… 1.2%　　　　1.1% 　　
Credit ……………………………………………  1.0%　　　   0.8% 　　
Special passengers ………………………………  0.9%　　　   0.9% 　　
Other ……………………………………………   6.2%　　　   5.3% 　　
Total　　　　　　　　　　　　　　　　　   100.%　　   100.%　　　
Total Number of Complaints　　　　　　        22,988　　　 13,278 49

1. About how many complaints concerning Credit were received by the CBC in 1998?

[ ]

A. 133 　　
B. 220 　　
C. 230 　　
D. 1,220

2. By about what percent did the total number of complaints decrease from 1998 to 1999?

[ ]

A. 40% 　　
B. 60% 　　
C. 75% 　　
D. 100%

3. Which of the following statements or sayings can be inferred from the table?
    I. In 1998 and in 1999, complaints about Flight problems, Baggage, and Customer service together took
        more than 50 percent of all consumer complaints received by the CBC Company. 　
    II. The number of Special passenger complaints was unchanged from 1998 to 1999.
    III. From 1998 to 1999 the number of Flight problem complaints increased by more than two percent.

[ ]

A. I only 　　
B. II only 　　
C. I and II only 　　
D. I and III only

查看答案和解析>>

同步練習冊答案