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  • 【句子改错SC】

    In the six-month period that ended on September 30, the average number of Sunday papers sold by the company was 81,000 less than the comparable period a year ago.

  • 【句子改错SC】

    【OG20-P812-893题】The use of lie detectors is based on the assumption that lying produces emotional reactions in an individual that, in turn, create unconscious physiological responses. 

  • 【逻辑CR】

    Neither a rising standard of living nor balanced trade, by itself, establishes a country's ability to compete in the international marketplace. Both are required simultaneously since standards of living can rise because of growing trade deficits and trade can be balanced by means of a decline in a country's standard of living. If the facts stated in the passage above are true, a proper test of a country's ability to be competitive is its ability to  

  • 【逻辑CR】

    Clearbell Telephone provides slow-dialing (SD) service to customers for a low fee, and  fast-dialing (FD) service to other customers who pay a somewhat higher fee. FD technology,  however, is so efficient that it costs Clearbell substantially less per average call to provide than  does SD. Nonetheless, accountants have calculated that Clearbell’s profits would drop if it  provided FD to all its customers at the current low-fee rate. Assume that installation costs for FD are insignificant if the customer already has SD service.  Which of the following, if true about Clearbell, best explains the results of the accountants’ calculation?

  • 【句子改错SC】

    In 1913, the largely self- taught Indian mathematician Srinivasa Ramanujan mailed 120 of his theorems to three different British mathematicians;only one, G. H. Hardy, recognized the brilliance of these theorems, but thanks to Hardy’s recognition, Ramanujan was eventually elected to the Royal Society of London.

  • 【逻辑CR】

    【OG20-P608-758题】It is widely assumed that people need to engage in intellectual activities such as solving crossword puzzles or mathematics problems in order to maintain mental sharpness as they age. In fact, however, simply talking to other people—that is, participating in social interaction, which engages many mental and perceptual skills—suffices. Evidence to this effect comes from a study showing that the more social contact people report, the better their mental skills.Which of the following, if true, most seriously weakens the force of the evidence cited?

  • 【逻辑CR】

    【OG20-P608-757题】With seventeen casinos, Moneyland operates the most casinos in a certain state. Although intent on expanding, it was outmaneuvered by Apex Casinos in negotiations to acquire the Eldorado chain. To complete its acquisition of Eldorado, Apex must sell five casinos to comply with a state law forbidding any owner to operate more than one casino per county. Since Apex will still be left operating twenty casinos in the state, it will then have the most casinos in the state.Which of the following, if true, most seriously undermines the prediction?

  • 【逻辑CR】

    【OG20-P608-756题】An experiment was done in which human subjects recognize a pattern within a matrix of abstract designs and then select another design that completes that pattern. The results of the experiment were surprising. The lowest expenditure of energy in neurons in the brain was found in those subjects who performed most successfully in the experiments. Which of the following hypotheses best accounts for the findings of the experiment? 

  • 【逻辑CR】

    【OG20-P607-755题】In Colorado subalpine meadows, nonnative dandelions co-occur with a native flower, the larkspur. Bumblebees visit both species, creating the potential for interactions between the two species with respect to pollination. In a recent study, researchers selected 16 plots containing both species; all dandelions were removed from eight plots; the remaining eight control plots were left undisturbed. The control plots yielded significantly more larkspur seeds than the dandelion-free plots, leading the researchers to conclude that the presence of dandelions facilitates pollination (and hence seed production) in the native species by attracting more pollinators to the mixed plots.Which of the following, if true, most seriously undermines the researchers’ reasoning?

  • 【逻辑CR】

    【OG20-P607-754题】Vargonia has just introduced a legal requirement that student-teacher ratios in government-funded schools not exceed a certain limit. All Vargonian children are entitled to education, free of charge, in these schools When a recession occurs and average incomes fall, the number of children enrolled in government-funded schools tends to increase. Therefore, though most employment opportunities contract in economic recessions, getting a teaching job in Vargonia's government-funded schools will not be made more difficult by a recession.Which of the following would be most important to in order to evaluate the argument? 

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