prep 的几道逻辑题

In Teruvia, the quantity of rice producedper year is currently just large enough to satisfy domestic demand. Teruvia'stotal rice acreage will not be expanded in the foreseeable future, nor willrice yields per acre increase appreciably. Teruvia's population, however, willbe increasing significantly for years to come. Clearly, therefore, Teruvia willsoon have to begin importing rice.

Which of the following is an assumption onwhich the argument depends?

A. Nopronounced trend of decreasing per capita demand for rice is imminent inTeruvia.

B. Notall of the acreage in Teruvia currently planted with rice is well suited to thecultivation of rice.

C.None of the strains of rice grown in Teruvia are exceptionally high-yielding.

D.There are no populated regions in Teruvia in which the population will notincrease.

E.There are no major crops other than rice for which domestic production anddomestic demand are currently in balance in Teruvia.

In a study conducted in Canada, servers invarious restaurants wrote “Thank you" on randomly selected bills beforepresenting the bills to their customers. Tips on these bills were an average ofthree percentage points higher than tips on bills without the message.Therefore, if servers in Canada regularly wrote “Thank you” on restaurant theiraverage income from tips would be significantly higher than it otherwise wouldhave been.

Which of the following is an assumption onwhich the argument relies?

A. The “Thank you" messages would havethe same impact on regular patrons of a restaurant as they would on occasionalpatrons of the same restaurant.

B. Regularly seeing “Thank you"written on their bills would not lead restaurant patrons to revert to theirearlier tipping habits.

C. The written “Thank you" remindsrestaurant patrons that tips constitute a significant part of the income ofmany food servers.

D. The rate at which people tip foodservers in Canada does not vary with how expensive a restaurant is.

E. Virtually all patrons of the Canadianrestaurants in the study who were given a bill with “Thank you” written on itleft a larger tip than they otherwise would have.

答案是Ｂ，但我选了Ａ。首先文章讲了“偶尔＂写thank you 会导致tips上升，所以regularly 写thank you的话，tips会增加的更快。
A，选项不是成功建立了两者间的桥梁么
B的话，我觉得是排除了一个干扰因素，但是earlier tipping habits指的是神马啊 文章里有说嘛？！

Three large companies and seven smallcompanies currently manufacture a product with potential military applications.If the government regulates the industry, it will institute a single set ofmanufacturing specifications to which all ten companies will have to adhere. Inthis case, therefore, since none of the seven small companies can afford toconvert their production lines to a new set of manufacturing specifications,only the three large companies will be able to remain in business.

Which of the following is an assumption onwhich the author's argument relies?

A. None of the three large companies willgo out of business if the government does not regulate the manufacture of theproduct.

B. It would cost more to convert theproduction lines of the small companies to a new set of manufacturingspecifications than it would to convert the production fines of the largecompanies.

C. Industry lobbyists will be unable todissuade the government from regulating the industry.

D. Assembly of the product producedaccording to government manufacturing specifications would be more complex thancurrent assembly procedures.

E. None of the seven small companiescurrently manufactures the product to a set of specifications that would matchthose the government would institute if the industry were to be regulated.

这道题，我是完全思密达了，不知道该怎么下手，答案是E。。 = =跪求NN

先拜谢了！！！