| GMAT考试易错题（2019/7/17） |
| 第1题：Which of the following is equal to x24 for all positive values of x A、x12+x12 B、(-x12)-2 C、(x6)6 D、(x2)(x3)(x4) E、(x72)1/3 |
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| 第2题：In a certain growth fund, 3/5 of the investment capital is invested in stocks, and of that portion, 1/3 is invested in preferred stocks. If the mutual fund has $846,000 invested in preferred stocks, what is the total amount of money invested in the fund A、$1,974,000 B、$2,538,000 C、$3,264,000 D、$3,826,000 E、$4,230,000 |
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| 第3题：The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether A、 Statement (1)ALONE、is sufficient, but statement (2) alone is not sufficient. B、 Statement (2)ALONE、is sufficient, but statement (1) alone is not sufficient. C、BOTH statements TOGETHER are sufficient, but NEITHER statementALONE、is sufficient. D、EACH statementALONE、is sufficient. Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient. If P and Q are both positive, what is the value of P (1) PQ is a positive multiple of 5. (2) 300 percent of P equals 500 percent of Q. |
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| 第4题： A、pharmaceutical company tested a new diet drug over a two-month perioD、The test group of 100 dieters lost an average of five pounds per person during the first month, but gained an average of two pounds per person in the second month. All of the following could help explain the results of the experiment except: A、The second month of the test occurred during a holiday season, when people are more likely to gain weight. B、The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month. C、The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month. D、The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights. E、The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug. |
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| 第5题：The questions in this group are based on the content of a passage.After reading the passage, choose the best answer to each question.Answer all questions following the passage on the basis of what is stated or implied in the passage. Dear Sirs, Given all the coverage that the emergence of hybrid cars has received in your pages in recent months, your readers may be interested to learn that gasoline-electric hybrids are not a new phenomenon at all, but rather the latest incarnation of an idea that has been kicking around for over a century. Indeed, the hybrid car has been around almost as long as the automobile itself. At the turn of the twentieth century, as the automotive age dawned, three power-generating technologies competed for dominance: steam, gasoline, and electricity. In the year 1900, steam was well known as the power source of the industrial revolution, and electricity was widely regarded as the power source of the future, so it was not at all obvious that internal combustion engines burning a fractional distillate of crude petroleum would have any particular edge in this race for the powertrains ofAmericA、Indeed, when engineer H. Piper filed the first patent application for a gasoline-electric hybrid motor in 1905, his intention was to use the gas to give a little kick to his perfectly serviceable electric engine. His goal: an engine that could accelerate from 0 to 25 miles per hour in 10 seconds. Piper achieved his goal.Electric and hybrid-electric engines powered more than 35,000 vehicles sold in 1912. These cars were perfectly adequate for the time, but over the following decade they mostly disappeared from the market, through no fault of their own. The cause of their decline was the spectacular improvements in the cost and performance of gasoline-powered cars.An onslaught of fast and cheap internal combustion cars from Ford, General Motors, andBuick essentially buried the electric and electric-hybrid motors by the 1920s. Continuing performance improvements in internal combustion engines and inexpensive gas pretty much kept hybrids buried until the oil crises of 1973 and 1979 gaveAmericans a reason to start thinking about fuel efficiency.Engineers had the motivation to think about fuel-efficient hybrids, but they still lacked the means to make hybrids economically competitive with gas-powered cars, because the performance of gas-electric engines lagged far behind that of gas-powered engines in acceleration, top speed, and cruising range. Dramatic improvements in electronics and computer technology during the 1990s, however, finally made the hybrid a reality.Advances in battery performance and, most importantly, computer-guided electric power transfer created a car that could drive like a regular car, but do so on half the tank of gas.As another century dawns, perhaps we are entering into a new automotive age. Based on the tone and content of the passage, the author of the passage is most likely which of the following A、An automotive engineer writing to his company management B、An enthusiast of automotive history writing to the editors of a car magazine C、A、college engineering student writing to a car manufacturer D、A、history professor writing to a television producer of historical documentaries E、An environmental activist writing to the editors of a newspaper |
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