问题：问答题What is the value of x-y? (1) (x-y)2=25 (2) 4x=4 (y+3)
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问题：单选题A group of hikers is planning a trip that will take them up a mountain using one route and back down using another route. They plan to travel down the mountain at a rate of one and a half times the rate they will use on the way up, but the time each route will take is the same. If they will go up the mountain at a rate of 4 miles per day and it will take them two days, how many miles long is the route down the mountain?A 4B 6C 8D 12E 16
问题：单选题The author of the passage most likely mentions “Little Green Men” in the first paragraph for what purpose?A To poke fun at the ignorance of most science fiction readersB To introduce a daunting challenge that will have to be addressed before human interstellar space travel can become possibleC To draw a comparison between the attempts of humans to voyage in space and the more successful attempts of other civilizationsD To draw an amusing distinction between a supposed danger of space travel, as presented in the popular media, and the actual challenges posed by interstellar space travel, as perceived by scienfistsE To suggest that the concept of human interstellar space travel is as much of a myth as the “Little Green Men” that appears in science fiction movies and television programs
问题：单选题Adam’s dog, a golden retriever named Hans, can respond to over 150 different commands. Adam cites this fact as evidence for his claim that Hans can understand the English language. Which of the following, if true, casts the most doubt on Adam’s claim that Hans can understand the English language?A Each of the 150 commands to which Hans responds involves both a spoken word in English and a distinctive hand sign.B Hans does not respond to the same commands when spoken to him by Adam’s French and Italian friends in their own languages.C Scientists have demonstrated conclusively that canine vocal chords are incapable of replicating many of the sounds used in the English language.D Animal behaviorists have demonstrated that even very young dogs surpass both wolves and chimpanzees—animals that are thought to be more intelligent than dogs—in the ability to understand human nonverbal communication.E The golden retriever is widely considered to be less intelligent than the border collie, and no border collie has ever been shown to truly understand the English language.
问题：单选题What is the primary purpose of the passage?A To compare and contrast two theories on the origin of the caste system in IndiaB To shed some light on an aspect of Indian society that can be confusing to outsidersC To highlight the social injustices still faced by the Untouchable caste in India todayD To discredit the theory that the’Arvan Invasio n, ‘brought an end to the Harappan civilizationE To explain to the reader the distinction between the Brahman and Kshatriya castes
问题：单选题Although many people would not believe it, the mosquito is actually the most dangerous animal in Africa. While the bite of the black mamba is invariably lethal when untreated, this dreaded snake kills only a few dozen people per year. Hippopotami, with their immense strength and foul dispositions, kill hundreds of people per year in rivers and lakes, but the mosquito is still more dangerous. Mosquitoes bite hundreds of millions of people in Africa every year, and they infect over a million each year with malaria, a disease that is often fatal. Which of the following questions would be most useful in evaluating the claim made above regarding the mosquito?A Could a person survive an attack by a black mamba if that person received prompt medical attention?B What criteria are used to determine which animal is the “most dangerous” animal?C Could the incidence of mosquito bites be decreased through the judicious use of pesticides and insect repellent?D Does malaria kill more people per year in Africa than tuberculosis?E How does the percentage of people who survive hippopotamus attacks in Africa each year compare with the percentage of people who survive mosquito bites?
问题：单选题Which of the following would make the most appropriate title for this passage?A Going Boldly Where No One Has Gone Before: The Promise and Peril of Interstellar Space TravelB The Day The Earth Stood Still: Why Interstellar Space Travel Is Essential to Human SurvivalC The Wrath of Larson: Egbert Larson’s Quest to Build an Interstellar SpacecraftD Busted Flat in Beta Regulus: The Crushing Challenges of Interstellar Space TravelE Say It Isn’t So, Mr. Einstein: Egberr Larson’s Challenge to the Theory of Relativity
问题：问答题A certain salad dressing made only of oil and vinegar is premixed and sold in the grocery store. What is the ratio of oil to vinegar in the mix? (1) An 18.6-ounce bottle of the salad dressing contains 12.4 ounces of vinegar. (2) In a 32-ounce bottle of the salad dressing, there is half as much oil as there is vinegar.
问题：单选题The main purpose of this passage is to ______.A Trace the historical progression of tea from its origins to the present day.B Give brief highlights from the history of the cultivation of tea.C Provide an anecdotal account how tea became a drink.D Highlight some important elements of the history of preparing and drinking tea.E Argue against the notion of tea drinking as a valid social art.
问题：单选题Based on the information given in the passage, which of the following would be most effective in preventing a person infected with malaria from developing a hemorrhagic fever?A Surgical removal of the spleenB A medicine that prevents changes to the surface proteins of red blood cellsC An effective vaccine against malariaD A potent pesticide that reliably kills the Anopheles mosquito without producing any negative consequences for the environment or for human healthE A small infusion of a weaker variant of the Plasmodium protozoan that will then compete with the existing parasitic infection
问题：单选题One of the biggest threats to a company’s productivity is absenteeism. Studies have shown that companieswith in-house childcare programs see fewer absences among their employees who are parents than companies without such programs. Therefore, many companies could boost their productivity by starting in-house childcare programs. Which of the following, if true, most weakens the above argument?A Companies that reimburse outside childcare programs actually see less absenteeism among working parents than companies within·house programs.B In-house childcare programs create distractions for nonparents that cart harm their productivity.C Absenteeism is not a serious problem for companies that impose harsh penalties on employees who miss work.D Studies have shown that employees with children are more likely than those without children to remain in the same job for more than five years.E Potential employees generally view companies with in-house childcare programs as more desirable places to work than companies without such programs.
问题：单选题Which of the following would make the most appropriate title for this passage?A The Long Way Home: Ulysses and Finnegan’s WakeB James Joyce, Ulysses, and the Battle against CensorshipC The Works of James Joyce, Ireland’s Literary GeniusD The Hidden Value of James Joyce’s Great NovelsE A Portrait of James Joyce as a Young Man
问题：问答题A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20? (1) The rectangle has a length of 16. (2) The rectangle has a width of 9.
问题：单选题In a physical education class, 20 students were tested on archery target shooting. These students were then given a two-day training course in archery technique. The students were tested again and showed a 30 percent increase in accuracy. This result proves that the course was effective in increasing people’s target-shooting accuracy. Which of the following, if true, gives the strongest support to the argument above?A The students were all excellent athletes, and excellent athletes tend to be good at target shooting.B The first testing session functioned as a practice ,session for the second testing session.C The accuracy with which people can shoot arrows is strongly related to the sharpness of their vision.D A similar group of students who were also tested on archery target shooting but were not given the course did not show an increase in accuracy.E Excellence in archery target shooting is an accomplishment achieved by relatively few of the people who take up the sport.
问题：单选题The author’s tone can best be described as which of the following?A Angry and subjectiveB Calm and objectiveC Analytic and ambivalentD Grim and self-satisfiedE Tentative and biased
问题：单选题Chorioretinitis is an inflammation of the eye that normally effects only small children, and it usually can be treated with antibiotics.A effects only small childrenB effects small children ordinarilyC affected small childrenD affects small childrenE affects only small children
问题：单选题According to the passage, which of the following will present the most difficult challenge for humans attempting interstellar space travel?A Achieving velocities near the speed of lightB Withstanding the acceleration necessary for traversing interstellar distancesC Maintaining clean air and water on a journey that could last centuriesD Accommodating the effects of relativistic time dilationE Enabling the humans on board to survive during the journey
问题：单选题In what light does the passage depict the efforts by Fredric Wertham to bring about regulation of the comic book industry?A As a fanatical crusade brought about by Wertham’s inner demonsB As a witch-hunt roughly analogous to the concurrent anti-Communist hearings by the House Committee on Un-American ActivitiesC As a reasonable response to an industry that had gone too farD As an angry response to a trend in the subject matter of the comic book industryE As an inappropriate response to a phenomenon that was not actually hurting anyone
问题：单选题A pharmaceutical company tested a new painkiller on 1,000 lab rats that were fed large doses of the painkiller for a two-month period. By the end of the experiment, 39 of the rats had died. The company concluded that the painkiller was sufficiently safe to test on humans. Which of the following, if true, provides the most support for the pharmaceutical company’s conclusion?A The amount of painkiller fed to the rats was substantially greater, in relation to body mass, than the dosage any human would take under normal circumstances.B Because of the different body chemistry of humans and rats, some compounds can be dangerous for rats but safe for humans, and vice versa.C Tests of this same painkiller on dogs showed that 3 out of 50 dogs developed lesions on their livers during the course of the experiment.D The researchers found that during the experiment, the rats showed a significantly lower sensitivity to pain than rats do under normal circumstances.E In an experiment of this length with this number of rats, it is not unusual for up to 50 rats to die during the experiment for reasons unrelated to the experiment itself.
问题：单选题His opponent having sprained his wrist, Andrew could have won by exploiting this weakness, but he chose not to do it.A His opponent having sprained his wrist, Andrew could have won by exploiting this weakness, but he chose not to do it.B Andrew could have won by exploiting this weakness after his opponent sprained his wrist, but he chose not to do so.C Choosing not to do so, Andrew could have won after his opponent sprained his wrist by exploiting this weakness.D After his opponent sprained his wrist, Andrew could have won by exploiting this weakness, but he chose not to do so.E After his opponent sprained his wrist, Andrew could have, but chose not to do it, won by exploiting this weakness.
