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  • 1698人已做

    600

    【句子改错SC】-8478-OG16

    Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, creating a special nongovernment organization to take charge of computer security planning.

  • 838人已做

    650

    【句子改错SC】-8479-PREP07

    Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as southern Texas.

  • 1516人已做

    600

    【句子改错SC】-8480-OG16

    A pioneer journalist, Nellie Bly’s exploits included circling the globe faster than Jules Verne’s fictional Phileas Fogg.

  • 765人已做

    650

    【句子改错SC】-8481-PREP07

    Nikola Tesla, the inventor of alternating current, because he was excited with the prospects of harnessing Niagara Falls for producing electric power, he predicted in the mid-1890's that electricity generated at Niagara would one day power the streetcars of London and the streetlights of P...

  • 1613人已做

    600

    【句子改错SC】-8482-OG16

    Retail sales rose 0.8 of 1 percent in August, intensifying expectations that personal spending in the July–September quarter more than doubled that of the 1.4 percent growth rate in personal spending for the previous quarter.

  • 1079人已做

    600

    【句子改错SC】-8483-PREP07

    The airline company, following through on recent warnings that it might start reducing service, announced that it was eliminating jet service to nine cities, closing some unneeded operations, and it grounded twenty-two planes.

  • 1409人已做

    600

    【句子改错SC】-8484-OG16

    The commission has directed advertisers to restrict the use of the word “natural” to foods that do not contain color or flavor additives, chemical preservatives, or nothing that has been synthesized.

  • 1618人已做

    650

    【句子改错SC】-8485-OG16

    Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and converting it to energy-rich sugars.

  • 1029人已做

    650

    【句子改错SC】-8486-PREP07

    The list of animals that exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include the lower vertebrates.

  • 1419人已做

    650

    【句子改错SC】-8487-OG16

    The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting.

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  • 【数据充分DS】-12164

    In the xy-coordinate plane, line m and line k intersect at the point (4, 3). Is the product of their slopes negative?(1) The product of the x-intercepts of lines m and k is positive.(2) The product of...

    88人做过-1条评论-58%正确率

  • 【问题求解PS】-14330

    Equal amounts of water were poured into two empty jars of different capacities, which made one jar 1/4  full a...

    62人做过-3条评论-72.6%正确率

  • 【句子改错SC】-11559

    Industrialization and modern methods of insect control have improved the standard of living around the globe while ...

    203人做过-1条评论-59.1%正确率

  • 【问题求解PS】-14339

    A certain basket contains 10 apples, 7 of which are red and 3 of which are green.  If 3 different&nb...

    70人做过-1条评论-74.3%正确率

  • 【句子改错SC】-10150

    Restorers say that if allowed to remove and replace the discolored layer of varnish on the Mona Lisa, thecolors Leonardo da Vinci painted nearly five hundred years ago will once again shine through.

    403人做过-2条评论-60.3%正确率

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