Comcorp Shipping Clerk: Last week, no shipments of building supplieswere sent out on Friday. The fivespecially ordered shipments sent out last week were sent out on Thursday, andeach of those specially ordered shipments consisted entirely of buildingsupplies. Four shipments were sent toTruax Construction last week, none of which consisted of building supplies. If the shipping clerk’s statementsare true, which of the following must also be true? A. All of Comcorp’s shipments ofbuilding supplies last week were specially ordered. B. None of Comcorp’s shipments senton Friday of last week was sent to Truax Construction. C. None of the shipments sent byComcorp to Truax Construction last week was specially ordered. D. None of Comcorp’s shipments senton Thursday of last week was sent to Truax Construction. E. All of Comcorp’s shipments ofbuilding supplies last week were sent out on Thursday. 答案是C，可是我选D
还有一道更晕的大家讨论一下啦~~ Technological improvements andreduced equipment costs have made converting solar energy directly intoelectricity far more cost-efficient in the last decade. However,the threshold of economic viability for solar power (that is, the price perbarrel to which oil would have to rise in order for new solar power plants tobe more economical than new oil-fired power plants) is unchanged at thirty-fivedollars. Which of the following, if true, doesmost to help explain why the increased cost-efficiency of solar power has notdecreased its threshold of economic viability? A. The cost of oil has fallendramatically.
B. The reduction in the cost ofsolar-power equipment has occurred despite increased raw material costs forthat equipment. C. Technological changes haveincreased the efficiency of oil-fired power plants. D. Most electricity is generated bycoal-fired or nuclear, rather than oil-fired, power plants. E. When the price of oil increases,reserves of oil not previously worth exploiting become economically viable. 这道彻底晕死。。。不知道上哪去找prep逻辑的讨论帖啊，都没有对应的题号
background:Technological improvements andreduced equipment costs have made converting solar energy directly intoelectricity far more cost-efficient in the last decade. premise:However,the threshold of economic viability for solar power (that is, the price perbarrel to which oil would have to rise in order for new solar power plants tobe more economical than new oil-fired power plants) is unchanged at thirty-fivedollars. type of question:EVALUATION THE ARGUMENT use "not" to test. this sentence is important."that is, the price perbarrel to which oil would have to rise in order for new solar power plants tobe more economical than new oil-fired power plants" let's simpify the sentence. per barrel price the oil would have to rise in order for S more economical than O. comparison S VS O,now " solar energy directly intoelectricity far more cost-efficient ",if the o also increased efficiency,then the threshold will not change.
conclusion: Last week, no shipments of building supplieswere sent out on Friday. evidence:The five specially ordered shipments sent out last week were sent out on Thursday, andeach of those specially ordered shipments consisted entirely of buildingsupplies. Four shipments were sent toTruax Construction last week, none of which consisted of building supplies. must be true.let's simplify the clue. five specially ordered shipments consisted of BS sent out last week. Four shipments consisted none of BS were sent to TC last week.must be true:the answer must contain keys. pay attention to this word:entirely.that means specially ordered shipments consisted entirely of BS have alreadly sent out on thursday.in other word,no specially ordered shipments consisted entirely of BS will be sent out on friday .And the shipment sent to TC.combine all informations,we can conclude that the choice(C) rember: must be true is the the way you make clues
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发表于 2011-11-27 21:20:49
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