GMAT考试易错题（2019/2/22）

第1题：某产品有一等品、二等品和不合格品三种，若在一批产品中一等品件数和二等品件数的比是5:3，二等品件数和不合格品件数的比是4:1，则该批产品的不合格品率约为()． A．7.2% B、8% C、8.6% D、9.2% E、10%

【单选题】： A     B     C     D     E

第2题：一艘小轮船上午8:00起航逆流而上(设船速和水流速度一定)，中途船上一块木板落入水中，直到8:50船员才发现这块重要的木板丢失，立即调转船头去追，最终于9:20追上木板．由上述数据可以算出木板落水的时间是()． A．8:35 B、8:30 C、8:25 D、8:20 E、8:15

【单选题】： A     B     C     D     E

第3题：The table below shows the enrollment in various classes at a certain college. class0 Number of Students Bioloby 50 Physics 35 Calculus 40 Although no student is enrolled in all three classes, 15 are enrolled in bothBiology and Physics, 10 are enrolled in bothBiology andCalculus, and 12 are enrolled in both Physics andCalculus. How many different students are in the three classes A、51 B、88 C、90 D、125 E、162

【单选题】： A     B     C     D

第4题：If 8a=9b and ab≠0, what is the ratio of

【单选题】： A     B     C     D

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. According to the passage, electric and hybrid cars failed to capture theAmerican automotive market in the early twentieth century because of what factor A、The improvement in cost and performance of gasoline-powered cars B、The superior fuel efficiency of hybrid cars C、The substandard performance of steam-powered cars D、Consumer fear of being electrocuted by gasoline-electric hybrids E、Government subsidies for gasoline- and coal-powered cars

【单选题】： A     B     C     D