With only about 1, 000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species(物种). That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called “Noah’s Ark”.
Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”
1.
The aim of “Noah’s Ark” project is to _______.
A. make efforts to clone the endangered pandas
B. save endangered animals from dying out
C. collect DNA of endangered animals to study
D. transfer the nuclear of one animal to another
2.
According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.
A. available panda eggs B. host animals C. qualified researchers D. enough money
3.
The best title for the passage may be _______.
A. China’s Success in Pandas Cloning
B. The First Cloned Panda in the World
C. Exploring the Possibility to Clone Pandas
D. China —the Native Place of Pandas Forever
4.
From the passage we know that _______.
A. Kraemer and his team have succeeded in cloning a dog
B. scientists try to implant a panda’s egg into a rabbit
C. Kraemer will work with Chinese scientists in clone researches
D. about two thousand of species will probably die out in a century
At the age of 13，I visited a doctor with my parents. As I sat in the examining chair，the doctor looked into my 31 .“She did inherit (继承) it，”he said with coldness.“You need to be prepared. There is no 32 for this disease.”
My father 33 a gene which，in most cases，results in blindness. I’d inherited the gene. He gradually 34 his eyesight and so did I. At last we were both 35 blind—he was fifty-seven years old， 36 I was only twenty-eight.
My world 37 as the darkness fell， 38 the dreams my husband and I had for us and for our three little boys. But 39 I tried to find some hope and 40 ，my eyes were opened to a new realization.
My father had 41 me not just failing eyesight，but an example of 42 in the face of hardships as well. We were all living in Bolivia in 1964 when he decided to 43 the family to America. He worked tirelessly to 44 the right of living in the US.
Alone in the States，he 45 his helplessness and lack of fluency in English. He managed to rent a small apartment，and nine months later，sent airline tickets for my mom，my brother and me.
Decades later， 46 an American citizen，I look back at what he'd shown me. He set an example proving that determination is important to success. His 47 taught me valuable lessons for my own path in the darkness.
I did the same as I stepped into a 48 world. I fulfilled (完成) my own 49 as a wife，mom，Sunday school teacher and Spanish interpreter. What I inherited from my father helped me to 50 my life in a whole new light.
1.A.mouth B.eyes C.ears D.throat
2.A.solution B.reason C.excuse D.cure
3..A.carried B.spread C.infected D.raised
4.A.damaged B.lost C.recovered D.gained
5.A.rapidly B.nearly C.completely D.terribly
6.A.though B.but C.so D.since
7.A.broke down B.broke off C.broke away D.broke out
8.A.realizing B.sharing C.disturbing D.destroying
9.A.when B.before C.unless D.until
10.A.honour B.beauty C.strength D.failure
11.A.handed B.rewarded C.given D.taught
12.A.contribution B.determination C.challenge D.honesty
13.A.move B.settle C.arrange D.send
14.A.enjoy B.declare C.apply D.win
15.A.accepted B.admitted C.overcame D.met
16.A.as B.like C.for D.to
17.A.knowledge B.journey C.situation D.event
18.A.cruel B.inner C.modern D. dark
19.A.promises B. hopes C. roles D. changes
20.A.touch B. end C. save D. see
If I could help___,I needn’t have taken trouble to send the broken computer to the repairing centre.
A. myself B.it C.that D.this
—You have promised to go ,then why aren’t you getting ready ？
—I you to go at once .
A．haven’t realized ;want B．didn’t realize ;wanted
C．don’t realize ;want D．don’t realize ;wanted
The new dictionaries are very useful. They well and already.
A. sell, have been sold out B. sold, had sold out
C. sell, sell out D. are sold, have been sold out
It disappointed his parents___he had failed to pass the exam for ______third time.
A. because ; a B. that; a C. when; the D. that; the
