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    DNA ( Deoxyribonucleic acid ) is one of the most important discoveries in science. DNA is the plan for the human being , as a blueprint is the plan for building. DNA makes a person look the way he does. A  person's  DNA. comes  from a mixing of his parents' DNA. That's why a child looks like his parents. But, besides controlling things such as height and hair color, DNA can also give people diseases , Scientists are now studying DNA to cure diseases.
    In the seventies, scientists developed a process called recombinant (重新组合) or RDNA. Although it sounds difficult to understand, RDNA simply means taking DNA from one animal or plant and putting it into another. By doing so, scientists can create new beings. In so doing, scientists can better understand DNA, especially what parts of DNA do . After they understand DNA, scientists can begin to cure diseases. Often, the new being created will itself be the cure.
    Besides curing diseases, RDNA research can also do other things. For example, scientists in Japan have already created “super-trees”. Trees help humans, because they take CO2, which poisons humans, from the air and turns it into oxygen, which lets humans breathe. “Super-trees” do this too, but do if much faster. As things such as cars and factories have already put much CO2 in the area, “super-trees” are badly needed.
    Unfortunately, there is serious danger in RDNA research. Scientists want to create animals to cure old diseases, but these new animals may also create new diseases. It will be a serious problem if the animals escape from the science laboratory and into nature. As these animals are not natural, they may let loose many new powerful diseases.
    As a result, RDNA research will create many solutions (解决方案), but it will also create many problems.
    67. From the passage, we can know that a boy looks like his parents because________
    A. he is son of his parents
    B. his parents' DNA decides his appearance
    C. he has received DNA from his father or his mother
    D. scientists have put some of his parents' DNA into him
    68. What does the underlined expression “let loose” probably mean?
    A. let... go free       B. get rid of        C. absorb          D. survive
    69. What is the best title for the passage?
    A.    The DNA Research in Japan 
    B. A New Way of DNA Research in Japan
    C. The Causes and Effects of DNA Research
    D. The Advantages And Disadvantages of RDNA
    70. The following statements are true about RDNA research EXCEPT_____.
    A. the research has been stopped because the created animals carry virus
    B. “super-trees” might be widely planted around the world
    C. scientists have not completely understood DNA
    D. RDNA research will benefit human beings a lot
    67-70 BADA

    67  B见第一段第三句话。
    68 A let loose 意为“释放”let go free 。
    69 D 纵观全文及文章最后一句话。
    70  A 此项在文章中没有提及。
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：完形填空

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    (   ) 1. A. wish            B. wait                 C. hope             D. expect
    (   ) 2. A. deal with       B. do with          C. develop with     D. form into
    (   ) 3. A. occurred        B. came                 C. ran          D. went
    (   ) 4. A. full           B. half                 C. bright       D. part
    (   ) 5. A. out of sight        B. visible          C. big          D. clear
    (   ) 6. A. until           B. when                 C. before       D. since
    (   ) 7. A. part            B. all              C. any          D. none
    (   ) 8. A. moon            B. eclipse          C. sun          D. shadow
    (   ) 9. A. each            B. every                C. either           D. all
    (   ) 10. A. On the whole   B. Generally speaking   C. On average   D. In addition
    (   ) 11. A. last           B. next                 C. other            D. another
    (   ) 12. A. go             B. see              C. come             D. look
    (   ) 13. A. point          B. evident          C. theory       D. significance
    (   ) 14. A. name           B. object           C. phenomenon   D. tradition
    (   ) 15. A. created        B. came about       C. made             D. copied
    (   ) 16. A. named      B. called           C. introduced       D. defined
    (   ) 17. A. error          B. name                 C. reality      D. number
    (   ) 18. A. blue           B. red              C. yellow       D. grey
    (   ) 19. A. published      B. posted           C. printed      D. written
    (   ) 20. A. in             B. out              C. away             D. on

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    科目：高中英语 来源：不详 题型：阅读理解

    Some scientists warn that ice near the Earth’s Poles may indeed be melting. This “polar meltdown” may be the first sign that the Earth is heating up. We could be in very serious trouble if this trend continues. It is estimated that a meltdown of as little as 10 percent of Antarctica’s ice would raise sea levels around the globe by 4 to 9 meters. Floods would cover low-lying regions and turn coastal cities like New York and New Orleans into real life underwater world.
    Scientists first predicted in the 1970s that heat trapped in the Earth’s atmosphere could cause a polar meltdown. Many now believe that human activities are turning up the heat. When we burn fossil fuels like coal and oil, we add carbon dioxide(CO2) gas to the Earth’s atmosphere. Cutting down trees also makes CO2 levels raise because trees normally soak up CO2 to make food. Scientists say higher CO2 levels strengthen the “greenhouse effect” and could increase the Earth’s temperature. In fact, CO2 levels have risen by 30 percent since the Industrial Revolution of the 18th and 19th centuries.
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    Another scientist Charles Bentley doesn’t think a meltdown will happen at all. “Even if warmer temperatures begin to melt polar-ice,” he says, “the excess moisture would most likely be redeposit as snow.” In other words, the melted ice would evaporate into the atmosphere, refreeze, and fall as rain and snow over the Poles.
    小题1:What consequence of global warming is mentioned in the passage?
    A．More tropical storms.B．More tropical diseases.
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    B．The increase of CO2 gas may warm the planet and help to melt polar ice.
    C．Cutting down trees helps to greatly reduce CO2 levels.
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    小题5:In which paragraph does the author mention the immense quantities of polar ice?
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    科目：高中英语 来源：不详 题型：阅读理解

    Six Americans are working on a new highway. But this highway won't have any traffic．It's an "ice highway" to the South Pole.
    The team has just finished a second year of work on the 1,020-mile highway. "The road is the greatest single footprint of activity we've seen in the Antarctic (南极洲)," said Alan Hemmings, an Australian environmentalist.
    The highway will provide a new way for supplies to be trekked (拉, 搬) across the earth on tractor-pulled sleds (雪橇). This method will use a lot less fuel than an aircraft, the current (当前的) way that scientists and supplies reach the Amundsen-Scott Base, a U.S. research station in the South Pole. The highway will also allow for equipment that is too big for planes to carry to be brought to Antarctica．Even with these benefits, there is one disadvantage—a round trip on the road will be 30 days, compared to a few hours by plane.
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    Crevasses (裂缝), or cracks, in the land often make the construction difficult. Crevasses are kind of like pot holes that form when surface ice is stretched．This can be very dangerous, especially when the crevasses are hidden under a layer (层) of snow and can't be seen.
    "Last year it took us three months to go three miles across a crevasse field, full of dangerous, hidden crevasses," said the project's manager, John Wright. Each year, more crevasses appear and they have to be filled with snow and ice so the road is safe for travel. The road will also be lined with green flags so travelers know where the safe surface is.
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    A．2B．4 C．6 D．8
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    D．bringing huge equipment to Antarctic
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    A．30.B．34.C．68.D．88.
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    A．Other crevasses won’t appear if a crevasse has been filled.
    B．Many new crevasses will form after a crevasse has been filled.
    C．Travelers can drive their sleds on the ice highway freely.
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    科目：高中英语 来源：不详 题型：阅读理解

    It's interesting that the arrival of snow has effect on people in different countries. For some countries it is an important happening to celebrate each year, while for others a catastrophe(灾害) or even a wonder.?
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    小题1:According to the writer, Britain is a country _______.?
    A．which has regular snowB．which is not well prepared for snow?
    C．for which snow is a catastropheD．for which snow is a wonder?
    小题2:After a few hours' snowing there are often some shortages of food because _______.?
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    小题3:The words “two kinds” in the passage mean the countries _______.?
    A．which have weather as yearly happening to celebrate or as rare (少见) weather?
    B．which either have heavy snow or light snow?
    C．to which snow either causes problems or no problems?
    D．which either have snow-ploughs or no snow-ploughs

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    科目：高中英语 来源：不详 题型：阅读理解

    An annoying problem for humans, who like to boast (夸耀) about all the distant planets and moons we have explored, is that we've never taken a good look right under our noses. The inside of the earth is relatively close, but how can we get there?
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    It gets harder and harder to drill deep into the earth because rocks get softer and softer. Hard but easily broken at the surface, rocks become plastic at depth, and the pressure caused by the weight of the overlaying crust ---  about 52,800 pounds per square inch at a depth of ten miles, makes further drilling impossible.
    What little we know about the inside of the earth (like the fact that there's a crust, a mantle, and a core) comes from indirect evidence, such as the analysis of earthquakes.
    So maybe it's time for a thorough new method to explore the earth's inside. Scientist David Stevenson says we should forget about drilling holes. Instead, we should open a crack (裂缝).
    Stevenson suggests digging a crack about a half mile long, a yard wide, and a half mile deep (not with a shovel) but with an explosion on the scale of a nuclear bomb. Next, he'd pour a few hundred thousand tons of molten (熔化的) iron into the crack, along with a robot. The iron, thicker than the surrounding crust, would move downward at about 16 feet per second, carrying the robot with it and opening the crack deeper and deeper. The iron mass would drop for about a week and 2,000 miles to the outer edge of the earth core, the robot sending out data to the surface.
    Stevenson compares his idea to space exploration. "We're going somewhere we haven't been before,"he says. "In all possibility, there will be surprises.”
    This idea can probably be put in the drawer marked with Isn't Going To Happen. The robot would have to survive temperatures that would melt pretty much anything. But Stevenson's idea may inspire a new look at an old problem. Great things can come from what seems like impossible ideas.
    小题1:Going inside the earth is _____ than going into space.
    A．more interestingB．more possibleC．easierD．more challenging
    小题2:How deep have we gone into the earth until now?
    A．6 miles.B．4,000 miles.C．7.5 miles.D．25 miles.
    小题3:Which of the following is TRUE about David Stevenson's idea?
    A．It is an inspiring but not practical idea now.
    B．It is a practical proposal that has come into use now.
    C．It is a good proposal that will soon be put into practice.
    D．It is a false theory that cannot be carried out at all.
    小题4: What might be the most suitable title for the text?
    A．An Annoying Problem for Humans
    B．To the Center of the Earth
    C．The Mohole Project
    D．David Stevenson's Proposal

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