中小学习题试卷教育文档 The FDA says most food from cloning is expected to come not from clones themselves，but from their sexually reproduced offspring. It says clones are expected to be used mostly as breeding animals to spread good qualities.
Public opinion studies show most Americans do not like the idea of food from cloned animals. But this research also shows the public know little about cloning. Cloning differs from genetic engineering. A cell taken from a so-called donor animal is grown into an embryo in the laboratory. Next，the embryo is placed into the uterus(子宫）of a female animal. If the process is success full the pregnancy reaches full term and a genetic copy of the donor animal is born. 28. From the passage，we know .
A. the US government is very cautious about the safety of cloned foods B. foods from cloned animals are popular in America C. cloned animals will be easy to produce
D. most foods from cloning are expected to come from clones themselves 29. Who believes that foods from cloning are safe to eat?
A. Most Americans. B. An advisory committee. C. Critics. D. The FDA. 30. It can be inferred from the last paragraph that . A. cloning has much in common with genetic engineering
B. not every cell taken from a donor animal can grow into a genetic copy C. the donor animal should be a female one D. cloned animals grow faster than normal ones
31. The best title of the passage is “ ”.
A. Food Production in the US B. Cloned Foods Waiting for Sale
C. People’s Comments on Cloned Foods D. Cloning and Genetic Engineering
D
What will power your house in the future? Nuclear wind or solar power? According to scientists at the Massachusetts Institute of Technology(MIT) in the US, it might be artificial leaves.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis (光合作用). Now researchers have found a way to imitate this process.
中小学习题试卷教育文档 The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts(催化剂). Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell (电池), using those two materials to produce electricity, located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card, scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. “One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology” said an American scientist, Nocera.
An artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf, however, is made of cheap materials, easy to use and highly stable. In laboratory studies, Nocera showed that an artificial leaf could operate continuously for at least 45 hours.
The wonderful improvements come from Nocera’s recent discovery of several powerful new, inexpensive catalysts. These catalysts make the
energy transformation inside the leaf more efficient with water and sunlight. Right now the new leaf is about 10 times more effective at carrying out photosynthesis than a natural one. Besides, the device can run in whatever water is available. This is important for some countries that don’t have access to pure water.
Hopefully, each home could have access to the new application in the future. 32. The purpose of this article is to .
A.introduce a new kind of device B.ask people to do the research C.advertise the new product D.show the process of photosynthesis
33. Which of the following is NOT the advantages of the new leaf?
A.It’s low in cost. B.It’s small in size. C.It has a wonderful fuel cell. D.It’s convenient for people to use. 34.What conclusion can be drawn from the text?
A.Nocera thought the new leaf is expensive for developing countries. B.Villages in Africa have benefited a lot from the new invention. C.Silicon chip can help the new leaf work more effectively. D.The equipment doesn’t necessarily operate in pure water. 35.What’s the writer’s attitude towards the new device?
中小学习题试卷教育文档 A.Negative. B.Optimistic. C.Doubtful. D.Uncertain.
二、七选五
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Perhaps you are an average student with average intelligence . However,you can receive better grades if you want.Yes，36_______.Here’s how.
·Plan your time carefully.37_______.Then make a schedule of your time.Be sure to set aside enough time to complete your normal reading and work assignments.Of course，studying shouldn’t take up all of the free time on the schedule.
·Skim before you read.Look over a passage quickly before you begin to read it more carefully.As you preview the material，38_______.Later when you begin to read， you will recognize less important material and you may jump over some of these parts.Skimming helps double your reading speed and improve your understanding as well.
39_______.Go over your notes as soon as you can after class.Review important points mentioned in class as well as points that confuse you.If you know what the teacher will discuss the next day， skim and read that material， too.If you review your notes and textbook regularly，40_______.Regular review leads to better grades in tests.
There are other techniques that might help you with your studying.Improving your studying habits will improve your grades. A.Review regularly
B.Make a list of your weekly tasks
C.you get some idea of the content and how it is organized
D.Listening to what the teacher says in class means less work later E.The purpose of a test is to show what you have learned about a subject F.the material will become more meaningful and you will remember it longer G.even students with average intelligence can be top students without extra work
三、完形填空
When I was eighteen, I couldn’t wait to get my first job, which meant I made the first step toward adulthood.
But it was difficult to get a work permit. One day I was dropped off by my parents at the 41 , where applicants took their physical tests for work permits. Although I had night blindness, my vision was clearer during the day, which helped me walk 42 by myself. Then the doctor began
中小学习题试卷教育文档 the 43 . He looked into my eyes with a bright light. “I suggest your parents take you to an eye specialist,” he said, “I 44 you have a retinal(视网膜) disease. If you do, you’ll never 45 day in your life…”
My parents did take me to specialists. After much time and money spent seeking an 46 result, it was determined that I had an eye disease that slowly 47 person of sight. But still, during daylight, I could walk without 48 . I could read, but not for hours. My eyes began to tear and words slipped off the page when I read more than a few pages. However, no matter how 49 my eyes became, I never gave up reading. I knew the 50 of great writers as well as the most popular music stars. Their words were powerful, which 51 me to try writing. Soon writing brought me a lot of 52 each time I completed a paper.
Then an important phone call from an editor changed my life. An article 53 appeared in a local newspaper. The newspaper, to my 54 continued to print my work. Next, a book series published several of my essays. I got interested in writing and 55 up with each acceptance. On the pages, readers never knew of my blindness 56 I chose to present it. For me, finding my voice through writing gave me the pride and satisfaction I began to 57 so many years ago. Now, I have numerous essays and articles in 58 .
Should I be thanking that misguided doctor? By falsely predicting that I could never work a day, he fueled my 59 into success. He set the bar too 60 and focused on what I wouldn’t be able to do. Yet I proved what I could do.
41.A.station B.clinic C.company D.lab
42.A.silently B.suddenly C.proudly D.easily
43.A.operation B.examination C.argument D.treatment
44.A.suspect B.order C.suggest D.command
45.A.rest B.live C.work D.sleep
中小学习题试卷教育文档 46.A.urgent B.obvious C.ordinary D.accurate
47.A.robs B.warns C.reminds D.informs
48.A.medicine B.allowance C.balance D.assistance
49.A.excited B.confused C.tired D.moved
50.A.houses B.names C.addresses D.habits
51.A.asked B.forced C.encouraged D.permitted
52.A.trouble B.pleasure C.stress D.worry
53.A.admitted B.wanted C.described D.penned
54.A.delight B.admiration C.disappointment D.shame
55.A.gave B.came C.lit D.put
56.A.unless B.although C.since D.after
57.A.fear B.bring C.seek D.reject
58.A.print B.time C.use D.mind
59.A.imagination B.motivation C.responsibility D.personality
60.A.far B.long C.close D.low 34. 四、语法填空
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。
James Long is holding a debate The economy or the environment---must we choose? Lin Shuiqing, a spokeswoman from the Green Society and Qian Liwei, 61. business development consultant presented their own opinions.
[优质精选]湖南省怀化中方县一中2019-2020学年高二英语9月月考试卷 doc
