<求助>prep-1 44 45 65

？44.D  (33799-!-item-!-188;#058&007092)

In countries in which new life-sustaining drugs cannot be patented, such drugs are sold at widely affordable prices; those same drugs, where patented, command premium prices because the patents shield patent-holding manufacturers from competitors.  These facts show that future access to new life-sustaining drugs can be improved if the practice of granting patents on newly developed life-sustaining drugs were to be abolished everywhere.  题干不太懂~

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

(A) In countries in which life-sustaining drugs cannot be patented, their manufacture is nevertheless a profitable enterprise.

(B) Countries that do not currently grant patents on life-sustaining drugs are, for the most part, countries with large populations.

(C) In some countries specific processes for the manufacture of pharmaceutical drugs can be patented even in cases in which the drugs themselves cannot be patented.

(D) Pharmaceutical companies can afford the research that goes into the development of new drugs only if patents allow them to earn high profits.

(E) Countries that grant patents on life-sustaining drugs almost always ban their importation from countries that do not grant such patents.

？45.B  (33847-!-item-!-188;#058&007123)

A major impediment to wide acceptance of electric vehicles even on the part of people who use their cars almost exclusively for commuting is the inability to use electric vehicles for occasional extended trips.  In an attempt to make purchasing electric vehicles more attractive to commuters, one electric vehicle producer is planning to offer customers three days free rental of a conventional car for every 1,000 miles that they drive their electric vehicle.

Which of the following, if true, most threatens the plan's prospects for success?

(A) Many electric vehicles that are used for commercial purposes are not needed for extended trips.

(B) Because a majority of commuters drive at least 100 miles a week, the cost to the producer of making good the offer would add considerably to the already high price of electric vehicles.

(C) The relatively long time it takes to recharge the battery of an electric vehicle can easily be fitted into the regular patterns of car use characteristic of commuters.

(D) Although electric vehicles are essentially emission-free in actual use, generating the electricity necessary for charging an electric vehicle's battery can burden the environment.

(E) Some family vehicles are used primarily not for commuting but for making short local trips, such as to do errands.

？65.E  (35041-!-item-!-188;#058&007595)这题我选得C~~题干里的“advertising”没用吗？选项跟它一点关系都没有

Sales of telephones have increased dramatically over the last year. In order to take advantage of this increase, Mammoth Industries plans to expand production of its own model of telephone, while continuing its already very extensive advertising of this product.

Which of the following, if true, provides most support for the view that Mammoth Industries cannot increase its sales of telephones by adopting the plan outlined above?

(A) Although it sells all of the telephones that it produces, Mammoth Industries' share of all telephone sales has declined over the last year.

(B) Mammoth Industries' average inventory of telephones awaiting shipment to retailers has declined slightly over the last year.

(C) Advertising has made the brand name of Mammoth Industries' telephones widely known, but few consumers know that Mammoth Industries owns this brand.

(D) Mammoth Industries' telephone is one of three brands of telephone that have together accounted for the bulk of the last year's increase in sales.

(E) Despite a slight decline in the retail price, sales of Mammoth Industries' telephones have fallen in the last year.

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谢谢~~了解

44和45 都是有因无果的削弱

65是无因的削弱

楼主体会一下，会茅塞顿开的