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PREP07 Test 2 OG18-文本逻辑 OG19-文本逻辑 OG20-文本逻辑
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The sustained massive use of pesticides in farming has two effects that are especially pernicious.First, it often kills off the pests' natural enemies in the area.Second, it often unintentionally gives rise to insecticide-resistant pests, since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed.From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of pesticides can be extended by doing which of the following, assuming that each is a realistic possibility?
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PREP07 Test 2
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S represents the sum of the weights of n fish in pounds. Which of the following represents the average (arithmetic mean) of the n weights in ounces? (1 pound = 16 ounces)
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PREP07 Test 2
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A pair of architects in Britain, who say that giant arches, bridges, and walls made of artificial bone could be easier to design and build than conventional structures, and already designed a number of structures, including a bridge, for showing how their idea would work.
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PREP07 Test 2
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What is the ratio of the number of cups of flour to the number of cups of sugar required in a certain cake recipe?(1) The number of cups of flour required in the recipe is 250 percent of the number of cups of sugar required in the recipe.(2) $$1\frac{1}{2}$$ more cups of flour than cups of sugar are required in the recipe.
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PREP07 Test 2
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Transnational cooperation among corporations is experiencing a modest renaissance among United States firms.even though projects undertaken by two or more corporations under a collaborative agreement are less profitable than projects undertaken by a single corporation.The advantage of transnational cooperation is that such joint international projects may allow United States firms to win foreign contracts that they would not otherwise be able to win.Which of the following is information provided by the passage above?
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PREP07 Test 2
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In 1999 Company X's gross profit was what percent of its revenue?(1) In 1999 Company X’s gross profit was 1/3 of its expenses.(2) In 1999 Company X’s expenses were 3/4 of its revenue.
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PREP07 Test 2
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In a certain bathtub, both the cold-water and the hot-water fixtures leak. The cold-water leak alone would fill an empty bucket in c hours, and the hot-water leak alone would fill the same bucket in h hours, where c < h. If both fixtures began to leak at the same time into the empty bucket at their respective constant rates and consequently it took t hours to fill the bucket, which of the following must be true? I. $$0 \lt t \lt h$$ II. $$c\lt t\lt h$$ III.$$ \frac{c}{2}\lt t \lt \frac{h}{2}$$
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PREP07 Test 2
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Whereas heat transferred between the ocean and the atmosphere occurs more rapidly when the ocean is warmer than the air, it is slow when the ocean is colder.
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PREP07 Test 2
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Leaders of a miners' union on strike against Coalco are contemplating additional measures to pressure the company to accept the union's contract proposal. The union leaders are considering as their principal new tactic a consumer boycott against Gasco gas stations, which are owned by Energy Incorporated, the same corporation that owns Coalco.The answer to which of the following questions is LEAST directly relevant to the union leaders' consideration of whether attempting a boycott of Gasco will lead to acceptance of their contract proposal?
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PREP07 Test 2
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At the bakery, Lew spent a total of $6.00 for one kind of cupcake and one kind of doughnut. How many doughnuts did he buy?(1) The price of 2 doughnuts was $0.10 less than the price of 3 cupcakes. (2) The average (arithmetic mean) price of 1 doughnut and 1 cupcake was $0.35.
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PREP07 Test 2
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If $$(2^x)(3^y) = 288$$, where x and y are positive integers, then $$(2^{x - 1})(3^{y - 2})$$=
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PREP07 Test 2 OG18-文本逻辑 OG19-文本逻辑 OG20-文本逻辑
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Sixty-five million years ago, according to some scientists, an asteroid bigger than Mount Everest slammed into North America, which, causing plant and animal extinctions, marks the end of the geologic era known as the Cretaceous Period.
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PREP07 Test 2
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If eleven consecutive integers are listed from least to greatest, what is the average (arithmetic mean) of the eleven integers? (1) The average of the first nine integers is 7. (2) The average of the last nine integers is 9.
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PREP07 Test 2
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If $$3^x - 3^{x - 1} = 162$$, then x(x - 1) =
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PREP07 Test 2
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Results from the 1998 National Demographic and Health Survey confirm that, even when compared with densely populated countries like Thailand and Indonesia, the Philippine nation's fertility rates consistently exceed all of its Southeast Asian neighbors.
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PREP07 Test 2
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For which of the following values of x is $$\sqrt{(1-\sqrt{(2 - \sqrt{x})}}$$ NOT defined as a real number?
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PREP07 Test 2
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What is the greatest integer that is less than t ?(1)$$ t = \frac{9}{4}$$(2) $$t = {(\frac{-3}{2})^2}$$
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PREP07 Test 2
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Unlike other Mayan cities, Cancun's commercial power throughout the lowlands seems to be from using its strategic position at the foot of the highlands, which were a source of jade, obsidian, and other valuable commodities.
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PREP07 Test 2
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Of the 4,800 voters who voted for or against Resolution K, 1800 were Democrats and 3,000 were Republicans. What was the total number of female voters who voted for Resolution K ?(1) 3/4 of the Democrats and 2/3 of the Republicans voted for Resolution K.(2)$$\frac{1}{3}$$ of the Democrats who voted for Resolution K and $$\frac{1}{2}$$ of the Republicans who voted for Resolution K were females.
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PREP07 Test 2
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Several educational research groups are denouncing the mayor's proposal of a system by which individual teachers would be given raises or bonuses should it be that test scores show their students' mastery of reading skills having improved over a nine-month period.
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