已选分类
管理学
单选题When airlines were deregulated in the 1970s, the average price of a ticket was $135. Three decades later, the average price is $275, there are twice as many in-air collisions, fliers in small markets are at the mercy of predatory carriers, and air rage is at an all-time high. It is time to re-regulate the air travel industry.
All of the following statements, if true, weaken the above argument except for which statement?
单选题"This company will not be training any more pilots in the foreseeable future, since we have 400 trained pilots on our waiting list who are seeking employment. The other five major companies each have roughly the same number of trained pilots on their waiting lists, and since the projected requirement of each company is for not many more than 100 additional pilots, there will be no shortage of personnel despite the current upswing in the aviation industry. "
Which one of the following, if true, casts the most doubt on the accuracy of the above conclusion?
单选题 January 32，14，24，28 April 45，50，58，47， June 76，80，74，79 August 84，95，100，89 November 48，43，39，42 In a set of measurements, the range is defined as the greatest measurement minus the least measurement．According to the table above, during the first four days of which month was the range of temperatures at noon the greatest?
单选题Inthefigureabove,segmentsRSandTUrepresenttwopositionsofthesameladderleaningagainstthesideSVofawall.ThelengthofTVishowmuchgreaterthanthelengthofRV?(1)The1engthofTUis10meters.(2)ThelengthofRVis5meters.
单选题Pollutants in the atmosphere can cause acid rain (rain with high acidity levels). While acid rain in itself cannot significantly affect the acidity of bodies of water into which it falls, it can greatly increase the acidity of nearby lakes by increasing the amount of decaying matter on a forest floor. A recent increase in the acidity of the water in Forest Lake, therefore, surely indicates that the rain failing nearby has become more acid.
Which of the following, if tree, most seriously weakens the argument?
单选题Maryinvested$8,400for6monthsinacertificateofdepositpayingpercentsimpleannualinterest.HowmuchmoreinterestwouldMaryhavereceivediftheinterestrateonthiscertificatehadbeen9percentsimpleannualinterest?(A)$2.10(B)$21.00(C)$42.00(D)$210.00(E)$420.00
单选题A car traveled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city? (A) 14 (B) 16 (C) 21 (D) 22 (E) 27
单选题Intheexpressionabove,a,b,andcaredifferentnumbersandeachisoneofthenumbers2,3,or5.Whatistheleastpossiblevalueoftheexpression?
单选题EachnumberinthearrangementaboveisobtainedfromthetWOnearestnumbersinthecolumnimmediatelytotheleftbysubtractingtheuppernumberfromthelowernumber.Whatisthevalueofz?(1)x=7(2)t=5
单选题There were 36,000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold, 9 times as many paperback copies as hardback copies were sold, if a total of 441, 000 copies of the novel were sold in all, how many paperback copies were sold?
单选题A merchant purchased a jacket for $60 and then determined a selling price that equalled the purchase price of the jacket plus a markup that was 25 percent of the selling price. During a sale, the merchant discounted the selling price by 20 percent and sold the jacket. What was the merchant's gross profit on this sale? (A) $0 (B) $3 (C) $4 (D) $12 (E) $15
单选题If it is 6:27 in the evening on a certain day, what time in the morning was it exactly 2,880, 717 minutes earlier? (Assume standard time in one location．)
单选题Isthepositiveintegernequaltothesquareofaninteger?(1)Foreveryprimenumberp,ifpisadivisorofn,thensoisp2.(2)isaninteger
单选题In the United States, vacationers account for more than half of all visitors to what are technically called "pure aquariums" but for fewer than one quarter of all visitors to zoos, which usually include a "zoo aquarium" of relatively modest scope.
Which of the following, if true, most helps to account for the difference described above between visitors to zoos and visitors to pure aquariums?
单选题CarsYandZtravelsidebysideatthesamerateofspeedalongparallelroadsasshownabove.WhencarYreachespointP,itforkstotheleftatanglex,changesspeed,andcontinuestostayevenwithcarZasshownbythedottedline.ThespeedofcarYbeyondpointPiswhatpercentofthespeedofcarZ?(1)thespeedofcarZis50milesperhour.(2)x=45
单选题When the integer n is divided by 6, the remainder is 3. Which of the following is NOT a multiple of 6?
单选题Acertainfractionisequivalentto.Ifthenumeratorofthefractionisincreasedby4andthedenominatorisdoubled,thenewfractionisequivalentto.Whatisthesumofthenumeratoranddenominatoroftheoriginalfraction?
单选题What is the maximum capacity in cups of a pail that contains only sand and is filled to three fourths of its capacity? (1)If one cup of sand were added to the pail, it would be filled to seven eighths of its capacity. (2)If two cups were removed from the pail, it would be filled to one half of its capacity.
单选题If n=p+r, where n, p, and r are positive integers and n is odd, does p equal 2? (1)p and r are prime numbers. (2)r≠2
单选题What is the volume of a certain rectangular solid? (1)Two adjacent faces of the solid have areas 15 and 24, respectively. (2)Each of two opposite faces of the solid has area 40.