已选分类
管理学
单选题Behind the hope that computers can replace teachers is the idea that the student"s understanding of the subject being taught consists in knowing facts and rules, the job of a teacher being to make the facts and rules explicit and convey them to the student, either by practice drills or by coaching. If that were indeed the way the mind works, the teacher could transfer facts and roles to the computer, which would replace the teacher as drillmaster and coach. But since understanding does not consist merely of knowing facts and rules, but of the grasp of the general concepts underlying them, the hope that the computer will eventually replace the teacher is fundamentally misguided.
Which one of the following, if true, would most seriously undermine the author"s conclusion that computers will not eventually be able to replace teachers?
单选题Is the integer n a multiple of 140? (1) n is a multiple of 10. (2) n is a multiple of 14.
单选题Last year Luis invested x dollars for one year, half at 8 percent simple annual interest and the other half at 12 percent simple annual interest. Now he wants to reinvest the x dollars for one year in the same two types of investments, but the lower rate has decreased, If the higher rate is unchanged, what fraction of the x dollars must be reinvest at the 12 percent rate s that the total interest earned from the x dollars will be the same for both years?
(1)The lower rate is now 6 percent.
(2)The total amount of interest earned from the two investments last year was $3,000.
单选题MonthAveragePriceperDozenApril$1.26May$1.20June$1.08Thetableaboveshowstheaverage(arithmeticmean)priceperdozenofthelargegradeAeggssoldinacertainstoreduringthreesuccessivemonths．IfasmanydozenweresoldinAprilasinMay,andtwiceasmanyweresoldinJuneasinApril,whatwastheaveragepriceperdozenoftheeggssoldoverthethree-monthperiod?
单选题Inthefigureabove,QRSisastraightlineand1ineTRbisects∠PRS.IsittruethatlinesTRandPQareparallel?(1)PQ=PR(2)QR=PR
单选题Inacertainanimalpopulation,foreachofthefirst3monthsoflife,theprobabilitythatananimalwilldieduringthatmonthis.Foragroupof200newbornmembersofthepopulation,approximatelyhowmanywouldbeexpectedtosurvivethefirst3monthsoflife?(A)140(B)146(C)152(D)162(E)170
单选题In how many different ways can 3 people be assigned to fill 3 different positions so that each person is assigned to exactly one position? (A) Twelve (B) Nine (C) Six (D) Three (E) One
单选题Inthefigureabove,lineACrepresentsaseesawthatistouchinglevelgroundatpointA.IfBisthemidpointofAC,howfarabovethegroundispointC?(1)x=30(2)PointBis5feetabovetheground.
单选题President of the United States: I have received over 2,000 letters on this issue, and the vast majority of them support my current position. These letters prove that most of the people in the country agree with me.
Which of the following, if true, most weakens the President"s conclusion?
单选题Asumof$200,000fromacertainestatewasdividedamongaspouseandthreechildren.Howmuchoftheestatedidtheyoungestchildreceive?(1)Thespousereceivedofthesumfromtheestate,andtileoldestchildreceivedoftheremainder.(2)Eachofthetwoyoungerchildrenreceived$12.500morethantheoldestchildand$62,500lessthanthespouse.(A)条件(1)充分，但条件(2)不充分．(B)条件(2)充分，但条件(1)不充分．(C)条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．(D)条件(1)充分，条件(2)也充分．(E)条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题S is a set of integers such that i) if a is in S. then -a is in S, and ii) if each of n and b is in S, then ab is in S. Is -4 in S? (1)1 is in S. (2)2 is in S.
单选题Mannis Corporation"s archival records are stored in an obsolete format that is accessible only by its current computer system; thus they are inaccessible when that system is not functioning properly. In order to avoid the possibility of losing access to their archival records in the case of computer malfunction, Mannis plans to replace its current computer system with a new system that stores records in a format that is accessible to several different systems.
The answer to which of the following questions would be most helpful in evaluating the effectiveness of the plan as a means of retaining access to the archival records?
单选题Isnaninteger?(1)n2isaninteger.(2)isaninteger.
单选题Inthediagramabove,pointsA,B,C,D,andErepresentthefiveteamsinacertainleagueinwhicheachteammustplayeachoftheotherteamsexactlyonce.Thesegmentsconnectingpairsofpointsindicatethatthetwocorrespondingteamshavealreadyplayedtheirgame.Thearrowsonthesegmentspointtotheteamsthatlost;thelackofanarrowonasegmentindicatesthatthegameendedinatie.Afterallgameshavebeenplayed,whichofthefollowingcouldNOTbethepercentofgamesplayedthatendedinatie?(A)10%(B)20%(C)30%(D)40%(E)50%
单选题If a is a positive integer, and if the units' digit of a2 is 9 and the units' digit of (a+1)2 is 4, what is the units' digit of (a+2)2? (A) 1 (B) 3 (C) 5 (D) 7 (E) 9
单选题A merchant paid $300 for a shipment of x identical calculators. The merchant used 2 of the calculators as demonstrators and sold each of the others for $5 more than the average (arithmetic mean) cost of the X calculators. If the total revenue from the sale of the calculators was $120 more than the cost of the shipment, how many calculators were in the shipment? (A) 24 (B) 25 (C) 26 (D) 28 (E) 30
单选题Adecoratorboughtaboltofdefectivecloththathejudgedtobeusable,inwhicheasethecostwouldbe$0.80perusableyard.Ifitwaslaterfoundthatonlyoftheboltcouldbeused,whatwastheactualcostperusableyard?(A)$0.60(B)$0.90(C)$1.00(D)$1.20(E)$1.70
单选题All of the following have the same number of distinct prime factors EXCEPT (A) 20 (B) 21 (C) 24 (D) 30 (E) 45
单选题How many positive integers k are there such that 100k is a factor of (22)(3)(53)? (A) None (B) One (C) TWO (D) Three (E) Four
单选题In December 1992 Tideville Shopping Mall repaired and improved the lighting in the mall"s parking lots, and in 1993 car thefts and attempted car thefts from those lots decreased by 76 percent from the previous year. Since potential car thieves are generally deterred by good lighting, the decrease can be attributed to these improvements.
Which of the following, if true, most hepls to strengthen the argument above?