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模考带练机经题
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A survey is about the situation of watching television among 100 people. There are 60 people watching sports program, 35 people watching the news program, and 40 people watching other programs. 10 people watch all the programs, and 5 people do not watch any programs. There are 10 people just watching two programs: the news and sports program, and 4 people just watching two programs: sports and other programs. How many people just watch one program: other shows?
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模考带练机经题
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The probability of getting head once and the probability of getting tail once are not the same when a coin is tossed once. If there are no other results of tossing a coin, what's the probability of getting both heads when the coin is tossed twice?
(1) the probability of getting head once is twice the probability of getting tail once.
(2) the probability of two tosses with one head and one tail is 4/9
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模考带练机经题
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If 12! is a multiple of $$(4!)^{n}$$ and not a multiple of $$(4!)^{n+1}$$, what is the value of n?
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模考带练机经题
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Is $$\frac{m}{n}$$ < $$\frac{n}{m}$$?
(1)mn > 0
(2)m < n
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OG21 OG2022
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A service provider charges c dollars for the first 50 hours of service used per month and 40 cents for each 30 minutes in excess of 50 hours used during the month.If x is an integer greater than 50,which of the following expressions gives this service provider's charge,in dollars,for a month in which x hours of service were used?
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OG21 OG2022
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A salesperson who had been driving at a speed of 100 kilometers per hour slowed down to a speed of 47 kilometers per hour. Approximately how many miles per hour was the speed reduced?
（1kilometer≈0.625mile）
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OG21 OG2022
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The table above shows the numbers of hours of television programs that Jane recorded last week and the numbers of hours she spent viewing these recorded programs.No recorded program was viewed more than once.If h is the number of hours of recorded programs she had not yet viewed by the end of Friday,which of the following intervals represents all of the possible values of h?
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OG21 OG2022
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According to a survey of 200 people, 60 enjoy skiing and 80 enjoy skating. If the number of people who enjoy neither skiing nor skating is 2 times the number of people who enjoy both skiing and skating, how many people surveyed enjoy neither skiing nor skating?
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OG21 OG2022
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A certain state's milk production was 980 million pounds in 2007 and 2.7 billion pounds in 2014. Approximately how many more million gallons of milk did the state produce in 2014 than in 2007? (1 billion = 10^9 and 1 gallon = 8.6 pounds.)
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OG21 OG2022
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Tanks A and B are each in the shape of a right circular cylinder. The interior of Tank A has a height of 10 meters and a circumference of 8 meters, and the interior of Tank B has a height of 8 meters and a circumference of 10 meters. The capacity of Tank A is what percent of the capacity of Tank B?
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OG21 OG2022
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Exchange Rates in a Particular Year
$1 = 5.3 francs
$1 = 1.6 marks
An America n dealer bought a table in Germany for 480 marks and sold the same table in Fra nee for 2,385 francs. What was the dealer's gross profit on the two transactions in dollars?
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OG21 OG2022
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The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The least possible value of the actual area of the square region is
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OG21 OG2022
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November 16, 2001, was a Friday. If each of the years 2004, 2008, and 2012 had 366 days, and the remaining years from 2001 through 2014 had 365 days, what day of the week was November 16, 2014?
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PREP07 Test 2
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A recent poll indicates that many people in the United States hold a combination of conservative and liberal political views; i.e.,they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting many specific government programs for health care, education, and the environment.
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PREP07 Test 1
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Shipwrecks are more likely to be found undisturbed at great depths than in shallow coastal waters, which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear, whether they be archaeologist, treasure hunter, or sport diver.
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PREP07 Test 1
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Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100,000 dangerous chemical pollutants, having gone virtually unregulated since they were developed more than 50 years ago.
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OG21 OG2022
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Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. So emission df these "greenhouse" gases contributes to global warming. In order to reduce global warming, emission of greenhouse gases needs to be reduced. Therefore, the methane now emitted from open landfills should instead be burned to produce electricity.
Objection: The burning of methane generates carbon dioxide that is released into the atmosphere.
Which of the following, if true, most adequately counters the objection made to the proposal?
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第一期
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If$$x = \sqrt{3} +\sqrt{7}$$ , what is the value of $$x+\frac{1}{x}$$ ?
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第一期
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There are three equations of x, y, and z. What is the value of x+y+z?
(1)-x+y+z=-10
(2)-x-y+z=-10
(3)-x+y-z=-10
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chagrin
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