Plant cloning has been an agricultural technique used by farmers and gardeners for centuries.Grafting(嫁接)is a common form of plant cloning.Many plants in nature actually clone themselves and reproduce asexually.
Cloned plants are much more predictable than normal plants, so their yield(产量)is more reliable.Cloned plants also reproduce faster, limiting the amount of time between planting and harvesting.It is often cheaper to produce seeds through cloning than through traditional methods.Plants can essentially be optimized so that farmers or individual growers always have the best seeds available.With more yield at a faster rate, farms can produce more food for more people while decreasing overall costs.
Cloning can be used to wipe out diseases that previously killed off the entire fields of crops.This would make plants immune(免疫的)to the kinds of diseases that farmers and gardeners around the world fear each year.Crop failures due to disease and virus could become a thing of the past.Also, plants that are near extinction can be brought back to life through cloning.
Through cloning scientists can develop“super”fruits and vegetables of superior nutritional quality.This could make for a healthier population overall.This is already being done through selective pollination(授粉), and genetic cloning could take it to the next level.
By plant cloning we have a population of identical plants and all these plants equally suffer from the same diseases, but in nature the weak would die and the strong would survive.While there are some dangers to consider with plant cloning, there are plenty of benefits that could prove vital to the propagation(繁衍)of the human species.
1.The underlined word“optimized”in Paragraph 2 can be replaced by“ ”.
A.enlarged B.produced
C.perfected D.examined
2.According to the text, cloned plants .
A.have lower yield than normal plants
B.have a short growth cycle
C.resist various kinds of diseases
D.need little care from people
3.what can we infer from the text?
A.The fruits produced by cloned plants taste much better.
B.There are more cloned plants than normal plants.
C.Plant cloning can disturb the laws of nature.
D.People should avoid cating cloned fruits.
4.What is the main purpose of the text?
A.To warn the negative effects of plant cloning.
B.To present different kinds of plant cloning.
C.To predict the future of plant cloning.
D.To inform us about the advantages of plant cloning.
根据语境及汉语或首字母提示正确拼写单词
1.Imagine mountains w__________ in silver water, shining in the spring sun.
2.Although the __________(区域)has plenty of rain, the mountains are steep and the earth is __________(浅的).
3.The flat terraces catch the rainwater and __________(防止)the soil from being washed away.
4.But perhaps what is most ________(影响深远的)is the way in which people have worked in h_______ nature to make these terraces and grow rice.
5.The terraces are cleverly d__________, with hundreds of waterways that connect with each other.
6.Although modern technology could help produce more crops, the rice growers are people for whom ________
(传统)hold much value.
7.This knowledge is passed down through families, which means that new g_________ continue to use ancient methods of __________(农业)to maintain the terraces.
8.Today, the Longji Rice Terraces a_________ thousands of visitors who come to __________(欣赏)this great wonder created by people and nature working together.
9.Don’t h__________ your eyes by reading in the bright sun.
10.She was busy; t__________ she could not come to the party.
11.China is situated in one of the most active earthquake __________(区域) in the world.
12.The __________(传统) of the Dragon Boat Festival started more than 2,000 years ago.
13.Our school was __________(设计) by a famous professor from Tongji University of Shanghai.
阅读下面短文,根据所给情节进行续写,使之构成一个完整的故事。
At first, Michael Surrell didn't see the black smoke or flames shooting from the windows of his neighbors' home. He and his wife had just parked around the corner from their own house in Allentown, Pennsylvania, when they got a call from one of his daughters: “The house next door is on fire! ” He went to investigate. That's when he saw a woman crying desperately on their porch.
“The baby' s in there! ” the woman cried. Though the fire department had been called, Surrell, then 64, instinctively ran inside. “The baby” was 8-year-old Tiara Roberts, the woman's granddaughter.
Entering the burning house was like “running into a bucket of black paint,” Surrell says. The thick smoke caused him to stumble blindly around, burned his eyes, and made it impossible to breathe. The conditions would have been dangerous to anyone, but for Surrell, who has chronic obstructive pulmonary disease (慢性阻塞性肺病), they were life-threatening.
After a few minutes in the smoke-filled house, he retreated outside to catch his breath. Surrell knew he couldn't hold his breath for long. Taking a deep breath, he went in a second time. The darkness was overwhelming. Yet because the house had a similar layout (布局)to his, he found the stairs and made it to the second floor. He turned to the right and was met by intense heat. He was already out of breath.
His throat and lungs burned as if he'd breathed in fire instead of the smoke and soot in the air. Every blink stung his eyes. All he could hear was the crackling and popping of burning wood. Then a soft but distinct moan (呻吟声) emerged. Still unable to see, Surrell fell to his knees on the hot wood floor. He crawled toward the sound, feeling around for any sign of the girl.
注意:
1.所续写短文的词数应为150词左右;
2.至少使用5个短文中标有下划线的关键词语;
3.续写部分分为两段,每段的开头语已为你写好;
4.续写完成后,请用下划线标出你所使用的关键词语。
Paragraph 1:
Finally, he touched something — a shoe, then an ankle.
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Paragraph 2:
Surrell woke up in the hospital a couple of days later.
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省国际文化交流中心将组织一次各国学生参加的“儒家文化”冬令营(ConfucianCultureWinterCamp)活动,要求报名者提交英文个人简历。假定你是李华,请根据以下要点提示写一篇个人简历。
1.个人基本信息(姓名、性别、年龄等);
2.个人优势。
注意:1.词数80左右;
2.可适当增加细节,以使行文连贯。
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阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
If this 13-year-old American boy succeeds in his effort 1. (climb) Mount Everest, he has modest ambitions — pick a small piece of rock from the top of the world as a memento (纪念品 ) and wear it in a necklace.
"I will not sell it or give it to anyone. It is something for 2. (me) to say ‘this is a rock from the summit', ” Jordan Romero from California, told reporters in Kathmandu. He left 3. the mountain on Sunday.
If he 4. (succeed), Romero will become 5. youngest climber to scale the 8,850 meters Everest summit. 6. (current) a 16-year-old Nepali boy, Temba Tsheri Sherpa, holds the record of being the world 's youngest climber of Mount Everest. But Romero said he was not after 7. (set) climbing records.
Romero said Mount Qomolangma was part of his goal to climb the highest mountains on all seven 8. (continent).
"It is just a goal,” he 9. (say) confidently. "If I don't succeed I am okay. I will try again. ”
Romero has already climbed Mount Kilimanjaro in Africa and Mount McKinley in Alaska among others.
"I know it requires a lot of 10. (patient). I will remain patient. I want to stay safe and make right choice, ”Romero said.
After I graduated from the university, I got so pressured in finding a job. I did a lot of ____ both online and handing in person to a particular company. It occurred, one day I went to _____ my CV (履历)to a certain company and I wanted to meet the human resource manager in person because I believed it was the best ____ than leaving my CV at the reception.
Unfortunately, in this company the __ did not allow me to see the human resource manager and ____ asked me to just leave the CV with her and that she would ____ it. I was really ____ since I knew she wouldn't do that and my CV will just be thrown in the trash can, I thought so because it usually ____ a lot in some other companies. So I just left with my head ____ and never thought about it again since I knew I would never get any ____ from the company.
Weeks passed and one day I received a call from a(an) ____ number and guess what...it was the human resource manager of that same company. I was really shocked since I did not _____ it at all. So he said he received my CV and that he would _____ it.
I was so happy and felt bad at the same time for _____ the receptionist the other day. This humbled me and it was a _____ to believe in people and not assume things just because of the norm.
1.A.designs B.applications C.preparations D.examinations
2.A.hand in B.give up C.carry out D.take back
3.A.result B.option C.position D.suggestion
4.A.lawyer B.president C.reporter D.receptionist
5.A.thus B.still C.instead D.therefore
6.A.create B.share C.deliver D.exchange
7.A.amazed B.frightened C.puzzled D.disappointed
8.A.fails B.works C.changes D.happens
9.A.up B.down C.aside D.forward
10.A.response B.suggestion C.project D.comment
11.A.familiar B.important C.unknown D.common
12.A.expect B.connect C.value D.confirm
13.A.agree on B.work on C.refer to D.search for
14.A.doubting B.scolding C.admiring D.punishing
15.A.decision B.conclusion C.reminder D.criterion