GMAT考试每日一练（2019/11/6）

第1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. Pretty much everybody agrees that clean air is a good thing, rightEvidently not so. Since the 1960s, when people started talking about clean air in the first place, theAmerican energy industry, which includes coal companies, oil companies, and utility companies, has dragged its heels on every initiative to improve the quality of the air we breathe.Even after theCleanAirAct of 1970 and its amendments in 1977 and 1990 made it clear that controlling air pollution is a national priority, these companies have found tricks and loopholes to avoid compliance. Perhaps the most egregious loophole is the one that allows older power plants to disregard limits on sulfux dioxide emissions until they undergo a major renovation, at which point they have to comply. Sulfur dioxide from coal-burning power plants is the primary cause of acid rain in NorthAmericA、TheCleanAirAct states that when coal-burning power plants upgrade their equipment, they must then comply with sulfur dioxide limitations by either installing scrubbing equipment that cleans the emissions or using fuel with lower sulfur content. The law tied the timing of compliance to major renovations in order to give power plants a grace period in which to comply. Many power plants, however, have exploited a loophole in this law by instituting a series of "minor" renovations that, in effect, upgrade their equipment without requiring them to comply with theCleanAirAct. Some plants have cheated the system by undergoing "minor" renovations for decades. The power companies claim that they have to resort to these underhanded measures because the cost of compliance with theCleanAirAct is too high.And if everyone else is cheating the system, why should they have to install costly sulfur dioxide scrubbers This cost argument falls apart upon scrutiny. Since 1977, more than 400 power plants across the country have managed to comply with the restrictions and are still making money. The sulfur dioxide scrubbing equipment has turned out to be far less expensive than the power industry naysayers claimed it would be. Many power plants have even complied with the emissions limits and reduced their operating costs by switching from high-sulfurAppalachian coal to the low-sulfur coal produced in western states such as Wyoming and Idaho. Western coal is not only cleaner than eastern coal, but also, because it is generally closer to the surface, as much as 30 percent less expensive to extract. Clearly, the costs of compliance with theCleanAirAct can be justified, but if these companies were honest, such justifications would not have to be made. If they were honest, they would acknowledge the costs of not complying: the health costs of increased rates of asthma and lung cancer in high-emissions areas; the environmental costs of acid-scarred forests and lakes; the aesthetic costs of a haze of sulfur dioxide cutting visibility across the eastern United States to only half of what it was in pre-industrial times. When you look at the true costs you have to ask, is any cost too high for clean air The author most likely begins and concludes the passage with questions for what reason A、To suggest possible areas for current and future research B、To pose a question that is answered in the body of the passage, and then to formulate a question that arises naturally out of the discussion C、To gain the readers’ attention and encourage their agreement with the arguments in the passage D、To suggest through rhetorical questions that the problems described in the passage do not actually have answers E、To test the readers’ knowledge of the material

【单选题】： A     B     C     D

第2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. Is the value of x3y-x2y2+xy3 equal to 0 (1) x=0 (2) y=0

【单选题】： A     B     C     D

第3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. Congressman Hastings has proposed thatCongress should abolish theElectoralCollege system for electing the president and replace it with a system of direct popular election. TheElectoralCollege system is flawed, he argues, because it runs directly counter to the democratic principle that every citizen’s vote should count equally. Because of the winner-take-all system in which the candidate who receives the most popular votes in a state receives all of that state’s electoral votes, the citizens who voted for the losing candidate are effectively disenfranchised from the national election, even if their candidate lost the state by only a handful of votes. Moreover, because each state’s number of electors is the same as its number of members ofCongress, the citizens of small states get a disproportionately larger vote than citizens of more populous states. In the 1988 election, for example, the combined voting-age population of the six least populous states--Alaska,Delaware, NorthDakota, SouthDakota, Vermont, and Wyoming--was 3,119,000. These six states held 21 electoral votes among them. Florida, with a voting-age population of 9,614,000, also had 21 electoral votes.Because of inequities of this nature, there have been four presidential elections in which the candidate who won theElectoralCollege actually lost the popular vote: 1824, 1876, 1888, and 2000. Congressman Markham has argued that Hastings’s proposed changes are unnecessary and even dangerous. First of all, he argues, theElectoralCollege system, whatever its flaws, has resulted in a stable democratic government for more than 200 years, which shows that it is doing something right. Second, the winner-take-all system helps create decisive majorities in theElectoralCollege, thereby reducing the problem of disputed elections that we might see in the event of direct popular elections. Third, the current system of allocating electors helps protect the interests of small states, which would be largely neglected in favor of large states if theElectoralCollege were based entirely on population. Protecting these states’ rights is essential to upholding the principle of federalism (in which the states and the federal government maintain distinct powers). When theElectoralCollege system was first formalized by the TwelfthAmendment in 1804, a direct popular vote would have been impossible to implement, and theElectoralCollege was probably the best way to approximate the will of the people.Advances in technology and communication, however, now mean that a direct popular vote would be as simple, if not simpler, to administer than the currentElectoralCollege system.Alternative ways to reform the system would be to do away with the winner-take-all system of state electors, to base the numbers of electors strictly on state populations, or to have a direct popular election but to weight the votes from different states differently in order to preserve the influence of small states. Which of the following best describes the structure of the passage A、It presents a critique of an institution, then provides a defense of that institution, and then offers possible compromises between the two positions. B、It presents an argument, lists problems with that argument, and then ultimately refutes the argument. C、It discusses both sides of a controversial topic and then chooses the side with the stronger arguments. D、It analyzes flaws in a traditional institution and then provides a series of steps to remedy the flaws. E、It presents two competing viewpoints and then shows the logical errors in both positions.

【单选题】： A     B     C     D

第4题：The following questions present a sentence, part of which or all of which is underlineD、Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others. These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard writtenEnglish; that is, pay attention to grammar, choice of words, and sentence construction.Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error. The governing board of the new league has modified its rules so that pre-existing teams can stay together even though not all their members meet the new minimum age requirement. A、not all their members meet the new minimum age requirement B、the new minimum age requirement has not been met by all their members C、not all their members have met the new minimum age, as required D、all their members have not met the new minimum age requirement E、all their members do not meet the new minimum age requirement

【单选题】： A     B     C     D

第5题：Over a three-week period, the price of an ounce of gold increased by 25% in the first week, decreased by 20% in the following week, and increased by 5% in the third week. If the price of gold was G dollars per ounce at the beginning of the three weeks, what was the price, in terms of G, at the end of the three weeks A、0.95G B、G C、1.05G D、1.1G E、1.15G

【单选题】： A     B     C     D

第6题：已知-2x2+5x+c≥0的解为 则c为()．

【单选题】： A     B     C     D

第7题：Oil is a nonrenewable resource, whereas sunshine is limitless. So why not run cars on solar powerBecause a car powered by solar collecting panels would be fine on a sunny day, but as soon as the sun went behind a cloud, the car would no longer function. Which of the following is presupposed in the argument against running a car on solar power A、Solar power is cleaner than fossil fuels, and it involves less geopolitical risk. B、In most of the northern hemisphere, it can be expected that more than 150 days a year will be cloudy. C、No system exists for storing solar energy for a car’s use when the car is not in direct sunlight. D、No one has yet introduced a commercially viable process for mass-producing solar cells that convert more than 10 percent of incoming sunlight into usable energy. E、Consumers accustomed to the rapid acceleration of gasoline-powered cars will not accept the weak acceleration of solar-powered cars.

【单选题】： A     B     C     D

第8题：Accordingtotheprofessor'sphilosophy,theantidotetoenvyisone'sownwork,alwaysone'sownwork:notthinkingaboutit,notassessingit,butsimplydoingit.（） (A)one'sownwork,alwaysone'sownwork:notthinkingaboutit,notassessingit,butsimplydoingit (B)alwayswork;becauseyoudon'tthinkaboutitorassessit,youjustdoit (C)alwaysone'sownwork:notthinkingaboutorassessingit,butsimplytodoit (D)nottothinkorassess,butdoingone'sownwork (E)neithertothinkaboutone'sownworknortoassessit,itisalwayssimplydoingit

【单选题】： A     B     C     D

第9题：等差数列an)中，a5＜O．a6＞0，且a6＞|a5|,Sn是前n项之和．则()． A．S1，S2，S3均小于0，而S4，S5，…均大于0 B．S1，S2，…，S5均小于0，而S6，S7，…均大于0 C．S1，S2，…，S9均小于0，而S10，S11，…，均大于0 D．S1，S2，…，S10均小于0．而S11，S12．…均大于0 E．以上结论均不正确

【单选题】： A     B     C     D     E

第10题：AncientRomansfoundittherapeutictobatheincoldmilk,instrawberriesthathadbeencrushed,orinbathtubsfilledwithblackcaviar.（） (A)tobatheincoldmilk,instrawberriesthathadbeencrushed,orinbathtubsfilledwithblackcaviar (B)thattheybatheincoldmilk,instrawberriesthathadbeencrushed,orincaviarthatwasblack (C)tobatheincoldmilk,crushedstrawberries,orblackcaviar (D)thattheybatheincoldmilk,crushedstrawberries,orblackcaviar (E)tobatheinmilk,strawberries,orcaviar

【单选题】： A     B     C     D     E