已选分类
管理学
单选题IfthesumofthefirstnpositiveintegersisS，whatisthesumofthefirstnpositiveevenintegers,intermsofS?(A)(B)S(C)2S(D)2S+2(E)4S
单选题A certain packing crate contains between 50 and 60 books. How many books are there in the packing crate? (1)If the books are counted out by three, there will be one book left over. (2)If the books are counted out by sixes, there will be one book left over. (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What is the value of the two-digit num-ber x? (1)The sum of the two digits is 4. (2)The difference between the two digits is 2.
单选题149 people were aboard Flight 222 when it arrived at Los Angeles from New York City with Chicago as the only intermediate stop. How many people first boarded the flight in Chicago? (1)170 people were aboard the flight when it left New York City. (2)23 people from the flight deplaned in Chicago and did not reboard.
单选题A rectangle with dimensions 24 inches by 42 inches is to be divided into squares of equal size. Which of the following could be a length of a side of the squares?
单选题Which of the following procedures is always equivalent to adding 5 given numbers and then dividing the sum by 5? Ⅰ Multiplying the 5 numbers and then finding the 5 th root of the product. Ⅱ Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left. Ⅲ Ordering the 5 numbers numerically and then selecting the middle number. (A) None (B) Ⅰonly (C) Ⅱonly (D) Ⅲonly (E) ⅠandⅢ
单选题Inthefigureabove,QRSisastraightlineand1ineTRbisects∠PRS.IsittruethatlinesTRandPQareparallel?(1)PQ=PR(2)QR=PR
单选题There are 4 card-processing machines in an office. The fastest of these machines processes x cards in 7 hours and the slowest processes x cards in 8 hours. Which of the following could NOT be the average time per machine for each of the 4 machines to process x cards? (A) 7.2 (B) 7.3 (C) 7.5 (D) 7.6 (E) 7.7
单选题Intheadditionproblemabove,eachofthesymbols□,△,and★representsapositivedigit.If□＜A,whatisthevalueof△?(1)★=4(2)□=1
单选题If the two-digit integers M and N are positive and have the same digits, but in reverse order, which of the following CANNOT be the sum of M and N?
单选题Which of the following, if true, best reconciles the discrepancy between the increase in unemployment and the increase in jobs in the manufacturing industry of Alameda?
单选题Larry saves x dollars per month. Will Larry's total savings one year from now exceed his present savings by at least $500? (Assume that there is no interest.) (1)In 6 months Larry's total savings will be $900. (2)In 3 months Larry's total savings will exceed his present savings by $150. (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If a certain grove consists of 36 pecan trees, what was the yield per tree last year? (1)The yield per tree for the 18 trees in the northern half of the grove was 60 kilograms last year. (2)The yield per tree for the 18 trees in the eastern half of the grove was 55 kilograms last year. (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If x is an integer, is(x+p)(x+q)an even integer? (1)q is an even integer. (2)p is an even integer.
单选题In each production lot for a certain toy, 25 percent of the toys are red and 75 percent of the toys are blue. Half the toys are size A and half are size B．If 10 out of a lot of 100 toys are red and size A, how many of the toys are blue and size B?
单选题In 1990 all of the people who applied for a job at Evco also applied for a job at Radeco, and Evco and Radeco each offered jobs to half of these applicants. Therefore, every one of these applicants must have been offered a job in 1990.
The argument above is based on which of the following assumptions about these job applicants?
单选题Scientific research that involves international collaboration has produced papers of greater influence, as measured by the number of times a paper is cited in subsequent papers, than has research without any collaboration. Papers that result from international collaboration are cited an average of seven times, whereas papers with single authors are cited only three times on average. This difference shows that research projects conducted by international research teams are of greater importance than those conducted by single researchers.
Which one of the following is an assumption on which the argument depends?
单选题In several nineteenth-century paintings the marble buildings of the Acropolis in Athens are portrayed as being reddish, but the buildings do not now appear reddish. The marble"s natural color cannot have changed since the nineteenth century, so the paintings must not be showing the color of the buildings as they actually appeared.
Which of the following, if true, most seriously undermines the argument above?
单选题3.2□△6 If □ and △ each represent single digits in the decimal above, what digit does □ represent? (1)When the decimal is rounded to the nearest tenth, 3.2 is the result. (2)When the decimal is rounded to the nearest hundredth, 3.24 is the result.
单选题Pam and Ed are in a line to purchase tickets. How many people are in the line? (1)There are 20 people behind Pare and 30 people in front of Ed. (2)There are 5 people between Pam and Ed.