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    阅读理解。
         Every year farmers in areas which often suffer flood in Southeast Asia lose millions of tons of rice to
    high water that kills their crops. That large amount of waste may soon be a thing of the past: SUBIA, a gene
    discovered by researchers which the International Rice Research Institute (IRRI) and the University of
    California, allows rice plants carrying the gene to live completely under water for two weeks.
         Flood - resistant (抗水浸) rice turned up among the 110,000 types of seed stored at the institute. It
    produced disappointingly low yields (产量), but scientists were able to transfer the gene into more bountiful
    varieties. These have shown promising results in tests by growers in India and Bangladesh over the past two
    years.
         This rice success story would not have been possible without the treasure of genetic diversity hidden in
    the IRRI's vault (underground room). As the world faces new agricultural challenge-charging climate, bugs
    and diseases that have developed resistance (抵抗力) to old defenses - such genetic resources are likely to
    become increasingly valuable. Fortunately, the IRRI is one of more than 1,000 organizations around the world
    working to protect crop genes. Most plant species grown for food have an associated bank that stores
    thousands of samples; seeds of landraces, wild relatives, and varieties that are rare, old, or adapted to very
    specific environments. The banks ensure that it will be possible to develop new varieties in the future.
         The need for these botanical libraries has its roots in modern agricultural practices. According to the U. N.
    Food and Agriculture Organization, 75 percent of plant diversity has been lost over the last century. Of more
    than 30,000 eatable species, humans grow just 200 for food; 60 percent of plant calories in our diet comes
    from wheat, rice, and corn.
    1. According to the second paragraph, what can we learn about the flood-resistant rice?
    A. It produces a small amount of rice.
    B. Scientists have developed many more varieties of it.
    C. Scientists have managed to improve its output.
    D. It can produce more rice than the other 110,000 types at the institute.
    2. From the passage we can infer that _____.
    A. the newly - discovered gene will bring hope to the farmers in the areas often suffering flood
    B. scientists will not be able to change the fact that rice plants carrying the gene produce low yields
    C. the tests by growers in India and Bangladesh were hopeless
    D. 110,000 types of seed stored at the Institute are flood - resistant
    3. What's the main idea of the third paragraph?
    A. The world faces new agricultural challenges.
    B. Such genetic resources are likely to become valuable.
    C. Scientists set up banks to store thousands of seed samples.
    D. We should owe the rice success story to the seed banks.
    4. As to the botanical libraries, the writer thinks they are _____.

    A. useless
    B. unnecessary
    C. needful
    D. needless

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    科目：高中英语 来源：陕西省师大附中、西工大附中2011届高三第七次适应性训练英语试题 题型：050

    阅读理解

    Oldest Ever Galaxy Found

    　　WASHINGTON(AP)－Astronomers believe they’ve found the oldest thing they’ve ever seen in the universe：It’s a galaxy(星系)far, far away from a time long, long ago．

    　　Hidden in a Hubble Space Telescope photo released earlier this year is a small point of light that European astronomers now calculate is a galaxy from 13．1 billion years ago．That’s a time when the universe was very young, just about 600 million years old．That would make it the earliest and most distant galaxy seen so far．

    　　By now the galaxy is so ancient it probably doesn’t exist in its earlier form and has already changed into bigger neighbors, said Matthew Lehnert of the Paris Observatory, lead author of the study published online Wednesday in the journal Nature．

    　　“We are looking at the universe when it was a 20th of its current age,” said California Institute of Technology astronomy professor Richard Ellis, who wasn’t part of the discovery team．“In human terms, we’re looking at a 4-year-old boy in the lifetime of an adult．”

    　　While Ellis finds the basis for the study “pretty good”, there have been other claims about the age of distant space objects that have not held up to careful examination．And some experts have questions about this one．But even the doubters praised the study as important and interesting．

    　　The European astronomers calculated the age after 16 hours of observations from a telescope in Chile that looked at light signatures of cooling hydrogen gas．

    　　Earlier this year, astronomers had made a general estimate of 600 to 800 million years after the Big Bang(宇宙大爆炸)for the most distant unclear points of light in the Hubble photograph, which was presented at an astronomy meeting back in January．

    　　In the new study, researchers focused on a single galaxy in their analysis of hydrogen’s light signature, further finding out the age．Garth Illingworth of the University of California, Santa Cruz, who was the scientist behind the Hubble image, said it provided confirmation for the age using a different method, something he called amazing “for such faint objects”．

    (1)

    We can learn from the passage that _________．

    [　　]

    A．

    the universe came into being about 14 billion years ago

    B．

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    C．

    the newly-discovered galaxy is the oldest one in the universe

    D．

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    (2)

    We can infer from the fourth paragraph that _________．

    [　　]

    A．

    the universe is actually very young

    B．

    the life-time of the universe is surprisingly long

    C．

    the humans have been so able as to see far into the universe

    D．

    what we can see about the universe now is just the tip of the iceberg

    (3)

    What did some people doubt according to the fifth paragraph?

    [　　]

    A．

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    B．

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    D．

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    阅读理解。
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    阅读理解。
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    阅读理解。
         Ever felt like destroying the car in front of you when you're
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    科目：高中英语 来源：0113 期中题 题型：阅读理解

    阅读理解。

          Ever since news of widespread food recalls caused by a carcinogenic dye (颜料) broke, there has been
    confusion over possible links to the country of the same name, but Sudan officials say there is no connection
    whatever.
         Sudan 1 is a red industrial dye that has been found in some chilli powder, but was banned in food products
    across the European Union (EU) in July 2003. Since the ban was put in place, EU officials have been striving
    to remove some food products from the shelves. So far 580 products have been recalled. Last week Sudan's
    Embassy in the United Kingdom asked the Food Standards Agency (FSA) for clarification of the origin of the
    dye's name.
         Omaima Mahmoud Al Sharief, a press official at Sudan's Embassy in China, explained the purpose of the
    inquiry was to clear up any misunderstanding over links between the country and the poisonous dye. 　　
         "We want to keep an eye on every detail and avoid any misunderstanding there," she said."Our embassy
    to Britain asked them how the dye got that name and whether the dye had something to do with our country.
    But they told us there was no relationship."
         The FSA, an independent food security watchdog in Britain, received a letter from the Sudanese embassy
    last week. 　
         "They asked us why the dye is named Sudan, however, we also do not know how it got the name," she
    said. "People found the dye in 1883 and gave it the name. Nobody knows the reason, and we cannot give any
    explanation before we find out."
         Sudan dyes, which include Sudan 1 to 4, are red dyes used for colouring solvents (溶剂), oils, waxes,
    petrol, and shoe and floor polishes. They are classified as carcinogens by the International Agency for
    Research on Cancer.

    1. What does the underlined word mean in paragraph one?
    A. Causing cancer.
    B. Having side effect.
    C. Containing poison.
    D. Poisonous.
    2. How did the Sudan 1 get its name?
    A. The dye is often produced in Sudan.
    B. The dye has something to do with the country named Sudan.
    C. Nobody is sure of the origin of the name.
    D. Many foods produced in Sudan contain the dye.
    3. We can infer from the passage that _____.
    A. the Sudan government is paying much attention to the food safety
    B. Sudan 1 is often used to be added to the food
    C. people didn't realize the danger of Sudan 1 until 2003
    D. many food shops will be closed down
    4. Which of the following is the best title?
    A. Keep away from Sudan 1
    B. No Sudan 1 dye links to the country
    C. How Sudan 1 dye got its name?
    D. Pay attention to the food safety

    查看答案和解析>>

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