2007年GMAT考试最新逻辑推理试题训练十八(2)

　　(E) Equipment used in the electronic network for transferring funds will be compatible with equipment used in other such networks.

　　4. Which of the following best completes the argument below?

　　One effect of the introduction of the electric refrigerator was a collapse in the market for ice. Formerly householders had bought ice to keep their iceboxes cool and the food stored in the iceboxes fresh. Now the iceboxes cool themselves. Similarly, the introduction of crops genetically engineered to be resistant to pests will______

　　(A) increase the size of crop harvests

　　(B) increase the cost of seeds

　　(C) reduce demand for chemical pesticides

　　(D) reduce the value of farmland(C)

　　(E) reduce the number of farmers keeping livestock

　　5. In 1985 the city’s Fine Arts Museum sold 30,000 single-entry tickets. In 1986 the city’s Folk Arts and Interior Design museums opened, and these three museums together sold over 80,000 such tickets that year. These museums were worth the cost, since more than twice as many citizens are now enjoying the arts.

　　Which of the following, if true, most seriously weakens the author’s assertion that more than twice as many citizens are now enjoying the arts?

　　(A) Most visitors to one museum also visit the other two.

　　(B) The cost of building the museums will not be covered by revenues generated by the sale of museum tickets.

　　(C) As the two new museums become better known, even more citizens will visit them.

　　(D) The city’s Fine Arts Museum did not experience a decrease in single-entry tickets sold in 1986.(A)

　　(E) Fewer museum entry tickets were sold in 1986 than the museum planners had hoped to sell.

　　6. F: We ought not to test the safety of new drugs on sentient animals, such as dogs and rabbits. Our benefit means their pain, and they are equal to us in the capacity to feel pain.

　　G: We must carry out such tests; otherwise, we would irresponsibly sacrifice the human lives that could have been saved by the drugs.

　　Which of the following, if true, is the best objection that could be made from F’s point of view to counter G’s point?

　　(A) Even though it is not necessary for people to use cosmetics, cosmetics are also being tested on sentient animals.

　　(B) Medical science already has at its disposal a 美国GREat number of drugs and other treatments for serious illnesses.

　　(C) It is not possible to obtain scientifically adequate results by testing drugs in the test tube, without making tests on living tissue.

　　(D) Some of the drugs to be tested would save human beings from 美国GREat pain.(E)

　　(E) Many tests now performed on sentient animals can be performed equally well on fertilized chicken eggs that are at a very early stage of development.

　　7. Which of the following best completes the passage below?