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题目： Sue's monthly earnings consist of a monthly salary and a 4 percent commission on the portion of her monthly sales that is in excess of $2,000. If Sue's monthly salary was the same in July as in August, how much greater were her sales in July than in August?(1) Sue's monthly earnings were $3,620 in July and $3,580 in August.(2) Sue's monthly salary was $3,500 in July and in August.

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题目： What is the value of $$({2}{x}-{5})^{3}$$ ? (1) $$({2}{x})^{3}={216}$$ (2) $$({2}{x}+{3})^{2}={81}$$

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题目： In the rectangular coordinate system, points (4, 0) and (-4, 0) both lie on circle C. What is the maximum possible value of the radius of C ?

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题目： What was the percent increase in the average (arithmetic mean) contribution per member of a certain public radio station from 1985 to 1995 ?(1)Total contributions by members increased from $505,210 in 1985 to $1,225,890 in 1995.(2)The number of members exactly doubled from 1985 to 1995.

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题目： The sum of the first k positive integers is equal to $$\frac{k(k+1)}{2}$$. What is the sum of the integers from n to m, inclusive, where $$0<{n}<{m}$$?

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The contractor and the engineer agree on the cause of the bridge failure, but both blame the other.

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One critic's response to the philosopher's new work is not that the position it takes is heretical, as some have asserted, but instead nothing new to anyone who knows anything about the topic.

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The state religion of ancient China, which came into existence at least as far back as the Han Dynasty (206 B .C . to A .D . 220) and perhaps as early as the Western Zhou Dynasty (1050 B .C . to 771 B .C .), allowed only emperors performing the ritual worship of heaven, perceiving them as special links between the earthly and celestial realms.

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In contrast to environmentalists' proposals to limit emissions of certain pollutants, the administration proposed calling for mandatory restrictions of only three such pollutants from power plants-mercury, sulfur dioxide, and nitrogen oxides-and the plan would delay such cuts until 2010 or later.

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Most states impose limitations on the authority of the legislature to borrow money, with their objectives being to protect taxpayers and the credit of the state government.

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The survival of a rare New Zealand species of mistletoe that produces spectacular sprays of scarlet flowers is threatened both because their leaves are extremely tasty to a voracious opossum species and also because their flowers are pollinated by two species of birds whose populations are in decline.

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Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered, and will not be subjected to emissions-control standards as stringent as they are for diesel-powered vehicles.

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At the turn of the twentieth century, forest covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them domesticated and performing various essential tasks.

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题目： In studies of extreme isolationism, researchers tried to determine if there was a limit on age after which an "isolated" child would be unable to develop socially. One child, Anna, was an illegitimate child and became a foster child to a family that had no time to care for her. She was left in the attic often and was attended to just enough to allow her to survive. At age 5 she was sent to another foster home where she experienced more interaction, yet by the time of her death at age 8 her development had not progressed.In another case, Rebecca, also an illegitimate child, had a new set of caretakers at age 4 and began seeing social development at age 6. Her development from age 6-10 accelerated and she was considered to have normal social development by age 10.Researchers concluded that social development after extreme cases of isolationism cannot develop past age 5 for a child but can develop before 5.

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题目： In a nationwide poll, N people were interviewed.If $$\frac{1}{4}$$ of them answered "yes" to question 1, and of those, $$\frac{1}{3}$$ answered "yes" to question 2, which of the following expressions represents the number of people interviewed who did not answer "yes" to both questions?