已选分类
管理学工商管理
单选题Caterpillars off all species produce an identical hormone called "juvenile hormone" that maintains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding.
Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?
单选题Foragroupofnpeople,kofwhomareofthesamesex,theexpressionyieldsanindexforacertainphenomenoningroupdynamicsformembersofthatsex.Foragroupthat,consistsof20people,4ofwhomarefemales,byhowmuchdoestheindexforthefemalesexceedtheindexforthemalesinthegroup?
单选题Since applied scientific research is required for technological advancement, many have rightly urged an increased emphasis in universities on applied research. But we must not give too little attention to basic research, even though it may have no foreseeable application, for tomorrow"s applied research will depend on the basic research of today.
If the statements above are true, which of the following can be most reliably inferred?
单选题If n is a positive integer and k+2=3n, which of the following could NOT be a value of K?
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If n and p are different positive prime numbers, which of the integers n4, p2, and np has (have) exactly 4 positive divisors? (A) n4only (B) p3only (C) nponly (D) n4andnp (E) p3andnp
单选题At a certain university, if 50 percent of the people who inquire about admission policies actually submit applications for admission, what percent of those who submit applications for admission enroll in classes at the university? (1)Fifteen percent of those who submit applications for admission are accepted at the university. (2)Eighty percent of those who are accepted send a deposit to the university.
单选题QuadrilateralRSTUshownaboveisasiteplanforaparkinglotinwhichsideRUisparalleltosideSTandRUislongerthanST.Whatistheareaoftheparkinglot?(1)RU=80meters(2)TU=meters
单选题If x=y2, what is the value of y-x? (1)x=4 (2)x+y=2
单选题Three stacks containing equal numbers of chips are to be made from 9 red chips, 7 blue chips，and 5 green chips．If all of these chips are used and each stack contains at least 1 chip of each color, what is the maximum number of red chips in any one stack?
单选题Many institutions of higher education suffer declining enrollments during periods of economic slowdown. At two-year community colleges, however, enrollment figures boom during these periods when many people have less money and there is more competition for jobs.
Each of the following, if true, helps to explain the enrollment increases in two-year community colleges described above EXCEPT:
单选题The geese that gather at the pond of a large corporation create a hazard for executives who use the corporate helicopter, whose landing site is 40 feet away from the pond. To solve the problem, the corporation plans to import a large number of herding dogs to keep the geese away from the helicopter.
Which of the following, if a realistic possibility, would cast the most serious doubt on the prospects for success of the corporation"s plan?
单选题IftankXcontainsonlygasoline,howmanykilolitersofgasolineareintankX?(1)IfofthegasolineintankXwerepumpedoutthetankwouldbefilledtoofitscapacity.(2)If0.75kiloliterofgasolinewerepumpedintotankX,itwouldbefilledtocapacity.(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A retailer sold an appliance for 30 percent above cost, which represented a gross profit of $21.00. For what price did the retailer sell the appliance?
单选题Many people acquire software programs for their home computers by illegally copying those programs rather than purchasing them. People who own home computers must be making, on average, fewer illegal copies of software programs than before, however, since the average number of software programs that people purchase to use on their home computers has increased substantially over the past five years.
Which of the following, if true, most strengthens the argument?
单选题A store currently charges the same price for each towel that it sells. If the current price of each towel were to be increased by $1,10 fewer of the towels could be bought for $120, excluding sales tax. What is the current price of each towel? (A) $1 (B) $2 (C) $3 (D) $4 (E) $12
单选题Hardin argued that grazing land held in common (that is, open to any user) would always be used less carefully than private grazing land. Each rancher would be tempted to overuse common land because the benefits would accrue to the individual, while the costs of reduced land quality that results from overuse would be spread among all users. But a study comparing 217 million acres of common grazing land with 433 million acres of private grazing land showed that the common land was in better condition.
Which of the following, if true and known by the ranchers, would best help explain the results of the study?
单选题Nuclear fusion is a process whereby the nuclei of atoms are joined, or "fused," and in which energy is released. One of the by-products of fusion is helium-4 gas. A recent fusion experiment was conducted using "heavy" water contained in a sealed flask. The flask was, in turn, contained in an air-filled chamber designed to eliminate extraneous vibration. After the experiment, a measurable amount of helium-4 gas was found in the air of the chamber. The experimenters cited this evidence in support of their conclusion that fusion had been achieved.
Which one of the following, if tree, would cast doubt on the experimenters" conclusion?
单选题Last year the annual premium on a certain hospitalization insurance policy was $408, and the policy paid 80 percent of any hospital expenses incurred. If the amount paid by the insurance policy last year was equal to the annual premium plus the amount of hospital expenses not paid by the policy, what was the total amount of hospital expenses last year?
单选题In respectable periodicals, books are given reviewing space in inverse proportion to the likely size of their sales. Airport and supermarket bookstalls stock only books that are expected to sell in large numbers. Consequently, those who buy books at such bookstalls have to do so without any guidance whatever from the book reviewers whose work is published in respectable periodicals.
Which of the following is a valid criticism of the argument above?