大家在备考GMAT考试的时候，需要准备的复习材料很多，对于计划参加GMAT考试的人来说，要想在GMAT考试中获取好的成绩，做适量的练习是必须的，下面就通过解答下面的GMAT练习材料来总结一些解题方法吧。

10.Last year the worldwide paper industry used over twice as much fresh pulp (pulp made directly from raw plant fibers) as recycled pulp (pulp made from wastepaper). A paper-industry analyst has projected that by 2010 the industry will use at least as much recycled pulp annually as it does fresh pulp, while using a greater quantity of fresh pulp than it did last year.

If the information above is correct and the analyst’s projections prove to be accurate, which of the following projections must also be accurate?

(A) In 2010 the paper industry will use at least twice as much recycled pulp as it did last years.

(B) In 2010 the paper industry will use at least twice as much total pulp as it did last year.

(C) In 2010 the paper industry will produce more paper from a given amount of pulp than it did last year.

(D) As compared with last year, in 2010 the paper industry will make more paper that contains only recycled pulp.（A）

(E) As compared with last year, in 2010 the paper industry will make less paper that contains only fresh pulp.

11.In malaria-infested areas, many children tend to suffer several bouts of malaria before becoming immune to the disease. Clearly, what must be happening is that those children’s immune systems are only weakly stimulated by any single exposure to the malaria parasite and need to be challenged several times to produce an effective immune response.

Which of the following, if true, most seriously undermines the explanatory hypothesis?

(A) Immediately after a child has suffered a bout of malaria, the child’s caregivers tend to go to great lengths in taking precautions to prevent another infection, but this level of attention is not sustained.

(B) Malaria is spread from person to person by mosquitoes, and mosquitoes have become increasingly resistant to the pesticides used to control them.

(C) A certain gene, if inherited by children from only one of their parents, can render those children largely immune to infection with malaria.

(D) Antimalaria vaccines, of which several are in development, are all designed to work by stimulating the body’s immune system.（E）

(E) There are several distinct strains of malaria, and the body’s immune response to any one of them does not protect it against the others.

12.An advertisement designed to convince readers of the great durability of automobiles manufactured by the Deluxe Motor Car Company cites as evidence the fact that over half of all automobiles built by the company since 1970 are still on the road today, compared to no more than a third for any other manufacturer.

Which of the following, if true, most strongly supports the advertisement’s argument?

(A) After taking inflation into account, a new Deluxe automobile costs only slightly more than a new model did in 1970.

(B) The number of automobiles built by Deluxe each year has not increased sharply since 1970.

(C) Owners of Deluxe automobiles typically keep their cars well maintained.

(D) Since 1970, Deluxe has made fewer changes in the automobiles it manufactures than other car companies have made in their automobiles.（B）

(E) Deluxe automobiles have been selling at relatively stable prices in recent years.

13.Many state legislatures are considering proposals to the effect that certain policies should be determined not by the legislature itself but by public referenda in which every voter can take part. Critics of the proposals argue that the outcomes of public referenda would be biased, since wealthy special-interest groups are able to influence voters’ views by means of television advertisements.

Which of the following, if true, most strengthens the critics’ argument?

(A) Many state legislators regard public referenda as a way of avoiding voting on issues on which their constituents are divided.

(B) During elections for members of the legislature, the number of people who vote is unaffected by whether the candidates run television advertisements or not.

(C) Proponents of policies that are opposed by wealthy special-interest groups are often unable to afford advertising time on local television stations.

(D) Different special-interest groups often take opposing positions on questions of which policies the state should adopt.（C）

(E) Television stations are reluctant to become associated with any one political opinion, for fear of losing viewers who do not share that opinion.

14.  Advertisement: Of the many over-the-counter medications marketed for the relief of sinus headache. SineEase costs the least per dose. And SineEase is as effective per dose as the most effective of those other medications. So for relief from sinus headaches, SineEase is the best buy.

Which of the following, if true, most seriously weakens the argument above?

(A) Most of the over-the-counter medications marketed for the relief of sinus headache are equally effective per dose in providing such relief.

(B) Many of the over-the-counter medications marketed for the relief of sinus headache contain the same active ingredient as SineEase.

(C) People who suffer from frequent sinus headaches are strongly advised to consult a doctor before taking any over-the-counter medication.

(D) An over-the-counter medication that is marketed for the relief of symptoms of head cold is identical in composition to SineEase but costs less per dose.（D）

(E) The per dose price for any given over-the-counter medication marketed for the relief of sinus headache is higher for smaller packages than it is for larger packages.

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