Question4-5 Advances in photocopying technology allow criminals with no printing expertise to counterfeit paper currency. One standard anticounterfeiting technique, microprinting, prints paper currency with tiny designs that cannot be photocopied distinctly. Although counterfeits of microprinted currency can be detected easily by experts, such counterfeits often circulate widely before being detected. An alternative, though more costly, printing technique would print currency with a special ink. Currency printed with the ink would change color depending in how ordinary light strikes it, whereas photocopied counterfeits of such currency would not. Because this technique would allow anyone to detect photocopied counterfeit currency easily, it should be adopted instead of microprinting, despite the expense. 4. Which one of the following, if true, provides the most support for the recommendation made by the argument? (A) When an anticounterfeiting technique depends on the detection Of counterfeits by experts, the cost of inspection by experts adds significantly to the cost to society of that technique. (B) For any anticounterfeiting technique to be effective, the existence of anticounterfeiting techniques should be widely broadcast, but the method by which counterfeits are detected should be kept secret. (C) The process of microprinting paper currency involves fewer steps than does the printing of paper currency with the special ink. (D) Before photocopying technology existed, most counterfeits of paper currency were accomplished by master engravers. (E) Many criminals do not have access to the advanced photocopiers that are needed to produce counterfeits of microprinted paper currency that cashiers will accept as real. 这道题的答案是a,我选了e.百思不得其解。 Question 13-14 Numisma ist : In medieval Spain, most gold coins were minted from gold mined in West Africa, in the area that is now Senegal. The gold mined in this region was the purest known. Its gold content of 92 percent allowed refining the gold, and indeed coins minted from this source of gold can be recognized because they have that gold content. The mints could refine gold and produced other kinds of coins that had much purer gold content, but the Senegalese gold was never refined. 13. Which one of the following inferences about gold coins minted in medieval Spain is most strongly supported by the information the numismatist gives? (A) Coins minted from Senegalese gold all contained the same weight, as well as the same proportion of gold. (B) The source of some refined gold from which coins were minted was unrefined gold with a gold content of less than 92 percent. (C) Two coins could have the same monetary value even though they differed from each other in the percentage of gold they contained. (D) No gold coins were minted that had a gold content of less than 92 percent. (E) The only unrefined gold from which coins could be minted was Senegalese gold. 答案是B,我选了C.文中并没有提到less than 92%的概念嘛。 希望高人指点迷津。
二题，留意这几个字：“The gold mined in this region was the purest known”，说明Senegal这个地方产出的GOLD的纯度是最高的，而这个最高的纯度是92%；而这个Senegal的GOLD没有被refine过，所以B中提到的“The source of some refined gold ”就一定不是Senegal，所以这个Source产出的GOLD的纯度就一定小于92%。B
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发表于 2003-7-11 09:42:00
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