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  • 802人已做

    650

    【句子改错SC】-8488-PREP07

    Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect its already-tattered image, and increase its ability to buy bond insurance.

  • 1066人已做

    600

    【句子改错SC】-8489-OG16

    As contrasted with the honeybee, the yellow jacket can sting repeatedly without dying and carries a potent venom that can cause intense pain.

  • 1046人已做

    600

    【句子改错SC】-8490-OG16

    Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.

  • 1253人已做

    600

    【句子改错SC】-8491-OG16

    Tropical bats play important roles in the rain forest ecosystem, aiding in the dispersal of cashew, date, and fig seeds; pollinating banana, breadfruit, and mango trees; and indirectly help produce tequila by pollinating agave plants.

  • 1159人已做

    650

    【句子改错SC】-8492-OG16

    None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.

  • 1032人已做

    600

    【句子改错SC】-8493-OG16

    In virtually all types of tissue in every animal species, dioxin induces the production of enzymes that are the organism’s trying to metabolize, or render harmless, the chemical that is irritating it.

  • 1278人已做

    680

    【句子改错SC】-8494-OG16

    Emily Dickinson’s letters to Susan Huntington Dickinson were written over a period beginning a few years before Susan’s marriage to Emily’s brother and ending shortly before Emily’s death in 1886, outnumbering her letters to anyone else.

  • 1035人已做

    600

    【句子改错SC】-8495-OG16

    Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.

  • 1102人已做

    600

    【句子改错SC】-8496-OG16

    Unlike the conviction held by many of her colleagues that genes were relatively simple and static, Barbara McClintock adhered to her own more complicated ideas about how genes might operate, and in 1983, at the age of 81, was awarded a Nobel Prize for her discovery that the genes in corn a...

  • 1030人已做

    600

    【句子改错SC】-8497-OG16

    Galileo was convinced that natural phenomena, as manifestations of the laws of physics, would appear the same to someone on the deck of a ship moving smoothly and uniformly through the water as a person standing on land.

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  • 【逻辑CR】-10342

    A prominent investor who holds a large stake in the Burton Tool Company has recently claimed that the company&...

    319人做过-5条评论-47.3%正确率

  • 【问题求解PS】-9381

    For any positive integer n, the sum of the first n positive integers equals n(n+1)/2 . What is the sum&nb...

    222人做过-2条评论-72.5%正确率

  • 【问题求解PS】-12423

    A certain law firm consists of 4 senior partners and 6 junior partners.  How many different groups of 3&n...

    82人做过-3条评论-67.1%正确率

  • 【句子改错SC】-8556

    Rivaling the pyramids of Egypt or even the ancient cities of the Maya as an achievement, the army of terr...

    738人做过-2条评论-66.9%正确率

  • 【句子改错SC】-8475

    A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be&...

    1136人做过-2条评论-70.5%正确率

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