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GMAT逻辑削弱题在线练习一

2018-05-04 17:08:00来源:网络

  The argument is most vulnerable to which of the following criticisms?

  A. It fails to establish whether bacteria actually developed on Mars.

  B. It fails to establish how likely it is that Martian bacteria were transported to Earth.

  C. It fails to consider whether there were means other than meteorites by which Martian bacteria could have been carried to Earth.

  D. It fails to consider whether all bacteria now on Earth could have arisen from transported Martian bacteria.

  E. It fails to consider whether there could have been strains of bacteria that originated on Earth and later died out.

  5.(Z5)Insect infestations in certain cotton-growing regions of the world have caused dramatic increase in the price of cotton on the world market. By contrast, the price of soybeans has long remained stable. Knowing that cotton plants mature quickly, many soybean growers in Ortovia plan to cease growing soybeans and being raising cotton instead, thereby taking advantage of the high price of cotton to increase their income significantly, at least over the next several years.

  Which of the following, if true, most seriously weakens the plan’s chances for success?

  A. The cost of raising soybeans has increased significantly over the past several year and is expected to continue to climb.

  B. Tests of a newly developed, inexpensive pesticide have shown it to be both environmentally safe and effective against the insects that have infested cotton crops.

  C. In the past several years, there has been no sharp increase in the demand for cotton and for goods made out of cotton.

  D. Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying.

  E. The species of insect that has infested cotton plants has never been known to attack soybean plants.

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本文关键字: GMAT逻辑题型 GMAT逻辑 GMAT

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