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官方指南

OG20官方指南,建议同学们刷3遍。

第一遍做题了解题型和考点,第二遍精刷,第三遍集中解决疑难问题。建议考生第一遍刷题采用官方正版纸质书籍。

若遇到疑难问题,欢迎在此专区查阅解析,提供解析,参与题目讨论,与所有考生一起解决疑难问题。
热门讨论
  • 【句子改错SC】

    Less than 400 Sumatran rhinos survive on the Malay peninsula and on the islands of Sumatra and Borneo, and they occupy a small fraction of the species` former range.

  • 【句子改错SC】

    In the textbook publishing business, the second quarter is historically weak, because revenues are low and marketing expenses are high as companies prepare for the coming school year.

  • 【句子改错SC】

    Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.

  • 【问题求解PS】

    In a survey of students, each student selected from a list of 12 songs the 2 songs that the student liked best.  If each song was selected 4 times, how many students were surveyed?

  • 【句子改错SC】

    A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.

  • 【句子改错SC】

    Mary Wollstonecraft’s A Vindication of the Rights of Woman (1792) was unprecedented in its firsthand accounts of the indignities suffered by women and because it was eloquent and passionate in exposing and criticizing these indignities.

  • 【句子改错SC】

    Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore. 

  • 【问题求解PS】

    【OG20-P179-215题】0.999999991.0001 −0.999999911.0003 = 

  • 【阅读RC】

    The author of the passage asserts that "the real GDP is almost always higher than ever before" (see highlighted text) most probably in order to

  • 【阅读RC】

    The passage suggests which of the following about the "women's advocates and women statisticians" mentioned in the highlighted text?

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  • 【逻辑CR】

    Ozone in the stratosphere blocks deadly ultraviolet rays from the sun, but  chlorofluorocarbons (CFCs) in aerosols and other products have thinned this protective layer.  Evidence of this is the ozone hole that forms over the South Pole every Antarctic spring as  temperatures drop bel...

  • 【逻辑CR】

    Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the earth. As is well known, the volume of these...

  • 【逻辑CR】

     Columnist: Metro City has a lower percentage of residents with humanities degrees than any other city of comparable size in our nation. Nationwide, university graduates generally earn more than people who are not university graduates, but those with humanities degrees typically earn less than ...

  • 【逻辑CR】

    Manufacturers sometimes discount the price of a product to retailers for a promotion period  when the product is advertised to consumers. Such promotions often result in a dramatic  increase in amount of product sold by the manufacturers to retailers. Nevertheless, the  manufacturers ...

  • 【逻辑CR】

    Scientist: In an experiment, dogs had access to a handle they could pull to release food into a nearby enclosure that contained a familiar dog and nothing else, contained an unfamiliar dog and nothing else, or was empty. The dogs typically released more food to the familiar dog than to the unfamilia...

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