简单的CR
1.filmpro sells millions of videocassettes directly to consumers at $25 a piece for a $10 profit of each. however, filmpro is losing money because people are buying illegally copied versions of its $25 videocassettes at far cheaper prices. so far,one million illegally copied cassettes have been sold for $5 each. illegal copying, therefore, has cost the company at least $10 million in potential profits.
which of the following is an assumption that if true would allow the conclusion above to be properly drawn?
a. the price of the illegally copied videocassettes never goes below $5 each
b. at least one million more cassettes would have been purchased from filmpro for $25 a piece if the illegally copied cassettes had not been available.
c. filmpro refunds money to customers dissatisfied with the original cassettes.
d. the illegally copied tapes are of such high quality that it is virtually impossible to differentiate betwwen them and the originals.
e. filmpro never sells discontinued videocassettes at less than $25 a piece.
2. it has been hypothesized that much of the matter in the universe is "dark";i.e., unseen. studies have shown that galaxies in many galaxy clusters are moving faster with respect to one another than they would if visible stars constituted all their mass. the studies suggest that the galaxies are moving under the gravitational influence of unseen mass in considerable quantity.
which of the following is an assumption underlying the passage above?
a. measurement of the speed of moving galaxies are extremely unreliable.
b. the workings of gravitational forces are not particularly well understood.
c. the aggregate mass of visible stars in the galaxies mentioned above can be estimated with some confidence.
d. the general composition of unseen matter in the universe has been determined.
e. without exception, the galaxies mentioned above move toward one another.
3.patel: although enrollment in the region's high school has been decreasing for several years, enrollment at the elementary school has grown considerably. therefore, the regional school board proposes building a new elementary school.
quintero: another solution would be to convert some high school classrooms temporarily into classrooms for elementary school students.
which of the following if true most helps to support q's alternative proposal?
a. some rooms at the high school cannot be converted into rooms suitable for the use of elementary school students.
b. the cost of building a high school is higher than the cost of building an elementary school.
c. although the birth rate has not increased, the number of families sending their children to the region's high school has increased markedly.
d. a high school atmosphere could jeopardize the safety and self-confidence of elementary school students.
e. even before the region's high school population began to decrease, several high school class rooms rarely needed to be used.
