已选分类
管理学
单选题A wildlife preserve is being planned for 3,000 rhinoceroses. The preserve is to contain a total of 10,000 acres of watering area, plus 100 acres of grazing area for each rhinoceros. If the number of rhinoceroses is expected to increase by 10 percent, how many thousand acres should the preserve have in order to provide for the increased population? (A) 340 (B) 330 (C) 320 (D) 310 (E) 300
单选题Of the science books in a certain supply room, 50 are on botany, 65 are on zoology, 90 are on physics, 50 are on geology, and 110 are on chemistry. If science books are removed randomly from the supply room, how many must be removed to ensure that 80 of the books removed are on the same science? (A) 81 (B) 159 (C) 166 (D) 285 (E) 324
单选题The painter Peter Brandon never dated his works, and their chronology is only now beginning to take shape in the critical literature. A recent dating of a Brandon self-portrait to 1930 is surely wrong. Brandon was 63 years old in 1930, yet the painting shows a young, dark-haired man--obviously Brandon, but clearly not a man of 63.
Which of the following, if justifiably assumed, allows the con- clusion to be properly drawn?
单选题A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead. If the necklace design begins with a red bead and ends with a white bead, then N could equal
单选题The cost C of manufacturing a certain product can be estimated by the formula C=0, 03rst2, where r and 8 are the amounts, in pounds, of the two major ingredients and t is the production time in hours. If r is increased by 50 percent, s is increased by 20 percent，and t is decreased by 30 percent, by approximately what percent will the estimated cost of manufacturing the product change?
单选题Which of the following statements can be inferred from the graph? Ⅰ．School X has a smaller enrollment than School Y. Ⅱ．If the age of a book is the number of years since purchase, then the average (arithmetic mean) age of a book in the School Y inventory is less than that of a book in the School X inventory. Ⅲ．According to the inventory, School X and School Y purchased the same number of textbooks in 1976.
单选题If S is the sum of the first n positive integers, what is the value of n? (1)S＜20 (2)S2＞220 (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Inacertainclassconsistingof36students,someboysandsomegirls,exactlyoftheboysandexactlyofthegirlswalktoschool.Whatisthegreatestpossiblenumberofstudentsinthisclasswhowalktoschool?
单选题Inthefigureabove,whatisthelengthofPQtimesthelengthofRS?(1)ThelengthofPQis5.(2)ThelengthofORtimesthelengthofPRisequalto12.
单选题Last Tuesday a trucker paid $155.76, including 10 percent state and federal taxes, for diesel fuel. What was the price per gallon for the fuel if the taxes are excluded? (1)The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday. (2)The trucker purchased 120 gallons of the fuel last Tuesday.
单选题Acertainalloycontainsonlylead,copper,andtin.Howmanypoundsoftinarecontainedin56poundsofthealloy?(1)Byweightthealloyisleadandcopper.(2)Byweightthealloycontains6partsleadand5partscopper(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Naturally occurring chemicals cannot be newly patented once their structures have been published. Before a naturally occurring chemical compound can be used as a drug, however, it must be put through the same rigorous testing program as any synthetic compound, culminating in a published report detailing the chemical"s structure and observed effects.
If the statements above are true, which of the following must also be true on the basis of them?
单选题What is the probability that events A and B both occur? (1)The probability that event A occurs is 0.8. (2)The probability that event B occurs is 0.6.
单选题A grocer is storing small cereal boxes in large cartons that measure 25 inches by 42 inches by 60 inches. If the measurement of each small cereal box is 7 inches by 6 inches by 5 inches, then what is the maximum number of small cereal boxes that can be placed in each large carton?
单选题In the United States in 1986, the average rate of violent crime in states with strict gun-control laws was 645 crimes per 100,000 persons—about 50 percent higher than the average rate in the eleven states where strict gun-control laws have never been passed. Thus one way to reduce violent crime is to repeal strict gun control laws.
Which of the following, if true, would most weaken the argument above?
单选题If M and N are positive integers that have remainders of 1 and 3, respectively, when divided by 6, which of the following could NOT be a possible value of M+N?
单选题Ben and Ann are among 7 contestants from which 4 semifinalists are to be selected. Of the different possible selections, how many contain neither Ben nor Ann?
单选题A breakfast that consists of 1 ounce of corn puffs and 8 ounces of fruit X provides 257 calories. When 8 ounces of fruit Y is substituted for the 8 ounces of fruit X, the total number of calories is reduced to 185. If fruit X provides 1.8 times as many calories as fruit Y, how many calories does 8 ounces of fruit Y alone provide?
单选题RectangularregionPQRSshownaboveispartitionedintotenidenticalsmallerrectangularregions,eachofwhichhaswidthx.WhatistheperimeterofPQRSintermsOfx?
单选题Within 20 years it will probably be possible to identify the genetic susceptibility an individual may have toward any particular disease. Eventually, effective strategies will be discovered to counteract each such susceptibility. Once these effective strategies are found, therefore, the people who follow them will never get sick.
The argument above is based on which of the following assumptions?