已选分类
管理学
单选题A freight elevator can carry a maximum load of 1200 pounds. Sean, who weighs 200 pounds, is in the elevator with two packages weighing 150 pounds and 280 pounds. If he needs to fit three more packages in the elevator that weigh as much as possible without exceeding the elevator limit, what is the difference between their average and the average of the two packages already in the elevator?
单选题If a motorist had driven 1 hour longer on a certain day and at an average rate of 5 miles per hour faster, he would have covered 70 more miles than he actually did. How many more miles would he have covered than he actually did if he had driven 2 hours longer and at an average rate of 10 miles per hour faster on that day?
单选题If n is a positive integer and k=5.1×10n, what is the value of k? (1)6,000＜k＜500,000 (2)k2=2.601×109
单选题x-y=3 2x=2y+6 The system of equations above has how many solutions?
单选题The level of lead contamination in United States rivers declined between 1975 and 1985. Federal regulations requiring a drop in industrial discharges of lead went into effect in 1975, but the major cause of the decline was a 75 percent drop in the use of leaded gasoline between 1975 and 1985.
Which of the following, if true, best supports the claim that the major cause of the decline in the level of lead contamination in United States rives was the decline in the use of leaded gasoline?
单选题On July 1, 1982, Ms. Fox deposited $10, 000 in a new account at the annual interest rate of 12 percent compounded monthly. If no additional deposits or withdrawals were made and if interest was credited on the last day of each month, what was the amount of money in the account on September 1, 1982?
单选题Studies have shown that people who rarely take antibiotics, which are antibacterial drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Which of the following, if true, best reconciles the apparent discrepancy in the information above?
单选题Despite the approach of winter, oil prices to industrial customers are exceptionally low this year and likely to remain so. Therefore, unless the winter is especially severe, the price of natural gas to industrial customers is also likely to remain low.
Which of the following, if true, provides the most support for the conclusion above?
单选题Over the last century, paleontologists have used small differences between fossil specimens to classify Triceratops into sixteen species. This classification is unjustified, however, since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time.
Which of the following, if true, would enable the conclusion of the argument to be properly drawn?
单选题In how many arrangements can a teacher seat 3 girls and 3 boys in a row of 6 seats if the boys are to have the first, third, and fifth seats? (A) 6 (B) 9 (C) 12 (D) 36 (E) 720
单选题Senator: Jones is highly qualified for appointment as a judge, as evidenced by Jones"s receiving a unanimous vote of "qualified" on the formal rating scale used by the Lawyers" Committee. That committee advises the Senate on judicial appointments.
Which of the following, if true, is the best reason for dismissing the senator"s claim that Jones is highly qualified?
单选题The United States Food and Drug Administration (FDA) regulates the introduction of new therapeutic agents into the marketplace. Consequently, it plays a critical role in improving health care in the United States. While it is those in the academic and government research communities who engage in the long process of initial discovery and clinical testing of new therapeutic agents, it is the FDA"s role and responsibility to facilitate the transfer of new discoveries from the laboratory to the marketplace. Only after the transfer can important new therapies help patients.
Which one of the following statements can be inferred from the passage?
单选题Tom: Employers complain that people graduating from high school too often lack the vocational skills required for full-time employment. Therefore, since these skills are best acquired on the job, we should require high school students to work at part-time jobs so that they acquire the skills needed for today"s job market.
Mary: There are already too few part-time jobs for students who want to work, and simply requiring students to work will not create jobs for them.
Which one of the following most accurately describes how Mary"s response is related to Tom"s argument?
单选题ThepricepershareofstockXincreasedby10percentoverthesametimeperiodthatthepricepershareofstockYdecreasedby10percent.ThereducedpricepershareofstockYwaswhatpercentoftheoriginalpricepershareofstockX?(1)TheincreasedpricepershareofstockXwasequaltotheoriginalpricepershareofstockY.(2)TheincreaseinthepricepershareofstockXwasthedecreaseinthepricepershareofstockY.
单选题Thenumberofdiagonalsofapolygonofnsidesisgivenbytheformula.Ifapolygonhastwiceasmanydiagonalsassides,howmanysidesdoesithave?
单选题AnairlinepassengerisplanningatripthatinvolvesthreeconnectingflightsthatleavefromAirportsA,B,andC,respectively.ThefirstflightleavesAirportAeveryhour，beginningat8:00a.m.,andarrivesatAirportBhourslater.ThesecondflightleavesAirportBevery20minutes,beginningat8:00a.m.,andarrivesatAirportChourslater.ThethirdflightleavesAirportCeveryhour,beginningat8.45a.m.Whatistheleasttotalamountoftimethepassengermustspendbetweenflightsifallflightskeeptotheirschedules?
单选题A pyramidal-shaped box to protect a plant is constructed with 4 lateral faces and an open bottom. What is the lateral area of the box? (1)The base of the pyramid is a polygon with all sides of equal length, and the perimeter of the base is 1 meter. (2)The 1ateral faces are isosceles triangles that have the same size and shape.
单选题An examination of corruption provides the basis for rejecting the view that an exact science of society can ever be constructed. As with all other social phenomena that involve deliberate secrecy, it is intrinsically impossible to measure corruption, and this is not merely due to the fact that social science has not yet reached its goal, achievable to be sure, of developing adequate quantifying techniques. If people were ready to answer questions about their embezzlements and bribes, it would mean that these practices had acquired the character of legitimate, taxable activities and had ceased to be corrupt. In other words, corruption must disappear if it is to be measurable.
Which one of the following most accurately states a hidden assumption that the author must make in order to advance the argument above?
单选题A circular peg is to be placed in a square hole. What is the perimeter of the hole? (1)The radius of the peg is 4 centimeters． (2)Each edge of the hole is tangent to the peg.
单选题Police statistics have shown that automobile antitheft devices reduce the risk of car theft, but a statistical study of automobile theft by the automobile insurance industry claims that cars equipped with antitheft devices are, paradoxically, more likely to be stolen than cars that are not so equipped:
Which one of the following, if true, does the most to resolve the apparent paradox?