LSAT考试逻辑推理练习题（10）

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20.Free public education is the best form of education there is.Therefore, we must fight to ensure its continued existence; that is, we must beready to defend the principle of equality of educational opportunity. Becausethis principle is we worth defending, it is clear that free public education isbetter than any other form of education.

Which one of the following illustrates thesame weak reasoning as found in the passage?

(A) I love music, and that’swhy I listen to it constantly. I have my stereo or radio on every wakingminute. Since I play music all the time, I must really love it.

(B) Books are my most valuable possessions.My books are like my friends-each pleases me in different ways. Just as I wouldgive up everything to save my friends, so too with my books.

(C) I would much rather be poor andrespected than be rich and despised. To have the respect of others is far morevaluable than to have millions of dollars.

(D) I have never been betrayed by any of myfriends. They have been true to me through good times and bad. Therefore I willnever betray any of my friends.

(E) Because every plant I have ever seen hasgreen leaves, I have concluded that all plants must have green leaves. Thislooks like a plant but it does not have green leaves, so it cannot be a plant.

21.Some people say that the scarcity of food is a function of the

finite limits of the earth’s resources, coupled witharelentless rate of population growth. This analysis fails to recognize,however, that much of t he world’s agricultural resources are used to feedlivestock instead of people. In the United States, for example, almost one-halfof the agricultural acreage is devoted to crops fed to livestock. A steerreduces twenty-one pounds of inexpensive grain to one pound of expensive meat.Thus, the scarcity of food is not merely a function of limited resources andpopulation growth.

Which one of the following is an assumptionthat would allow the conclusion in the argument to be properly drawn ?

(A) People prefer eating meat to eatinggrain.

(B) Meat is twenty-one times more expensivethan grain.

(C) The limits of the earth’sagricultural resources are not finite.

(D) More than one-half of the agriculturalacreage in the United States is devoted to crops fed to humans.

(E) Growing crops for human consumption ofthe acreage currently devoted to crops for livestock will yield more food formore people.

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