GMAT逻辑题练习及答案(394)

2017-09-26 09:23

来源：新东方在线

作者：

　　GMAT逻辑题目:

　　The efficiency of microwave ovens indestroying the harmful bacteria frequently found in common foods is diminishedby the presence of salt in the food being cooked. When heated in a microwaveoven, the interior of unsalted food reaches temperatures high enough to killbacteria that cause food poisoning, but the interior of salted food does not.Scientists theorize that salt effectively blocks the microwaves from heatingthe interior.

　　Which one of the following conclusions ismost supported by the information above?

　　A. Thekinds of bacteria that cause food poisoning are more likely to be found on theexterior of food than in the interior of food.

　　B. Theincidence of serious food poisoning would be significantly reduced if microwaveovens were not used by consumers to cook or reheat food.

　　C. Theaddition of salt to food that has been cooked or reheated in a microwave ovencan increase the danger of food poisoning.

　　D. Thedanger of food poisoning can be lessened if salt is not used to prepare foodsthat are to be cooked in a microwave oven.

　　E. Saltis the primary cause of food poisoning resulting from food that is heated inmicrowave ovens.

　　参考答案：D

　　思路：

　　On the one hand:

　　the presence of salt in the food beingcooked salt effectively blocks the microwaves from heating the interior Theefficiency of microwave ovens in destroying the harmful bacteria frequentlyfound in common foods is diminished

　　On the other hand:

　　unsalted food is heated by microwave theinterior of unsalted food reaches temperatures high enough kill bacteria thatcause food poisoning

　　So , D is the best choice.

　　A. isout of scope because the exterior of food is not mentioned in this argument.

　　B. isalso out of scope too. We never know what will happen if microwave ovens werenot used by consumers to cook or reheat food. Because the statement have no therelevant information.

　　C. ispuzzle. The statement just infers that the harmful bacteria frequently found incommon foods is keep same. The salt only prevent microwave from destroying suchbacteria. Even though the addition ofsalt to food will significantly prevent the efficiency of microwave ovens, wecan not reach the conclusion that the addition of salt to food that has beencooked or reheated in a microwave oven can increase the danger of foodpoisoning. So C is problematic choice.

　　D. isthe best choice.

　　E. maybe the extreme pole. The statement not mention that salt is the primary causeof food poisoning resulting from food. It is possible that salt is the relevantfactor in determining the efficiency of microwave ovens.

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