TEST 17
25 Minutes 16 Questions
1. A report on acid rain concluded, “Most forests in Canada are not being damaged by acid rain.” Critics of the report insist the conclusion be changed to, “Most forests in Canada do not show visible symptoms of damage by acid rain, such as abnormal loss of leaves, slower rates of growth, or higher mortality.”
Which of the following, if true, provides the best logical justification for the critics’ insistence that the report’s conclusion be changed?
(A) Some forests in Canada are being damaged by acid rain.
(B) Acid rain could be causing damage for which symptoms have not yet become visible.
(C) The report does not compare acid rain damage to Canadian forests with acid rain damage to forests in other countries.
(D) All forests in Canada have received acid rain during the past fifteen years.(B)
(E) The severity of damage by acid rain differs from forest to forest.
2. In the past most airline companies minimized aircraft weight to minimize fuel costs. The safest airline seats were heavy, and airlines equipped their planes with few of these seats. This year the seat that has sold best to airlines has been the safest one—a clear indication that airlines are assigning a higher priority to safe seating than to minimizing fuel costs.
Which of the following, if true, most seriously weakens the argument above?
(A) Last year’s best-selling airline seat was not the safest airline seat on the market.
(B) No airline company has announced that it would be making safe seating a higher priority this year.
(C) The price of fuel was higher this year than it had been in most of the years when the safest airline seats sold poorly.
(D) Because of increases in the cost of materials, all airline seats were more expensive to manufacture this year than in any previous year.(E)
(E) Because of technological innovations, the safest airline seat on the market this year weighed less than most other airline seats on the market.
3. A computer equipped with signature-recognition software, which restricts access to a computer to those people whose signatures are on file, identifies a person’s signature by analyzing not only the form of the signature but also such characteristics as pen pressure and signing speed. Even the most adept forgers cannot duplicate all of the characteristics the program analyzes.
Which of the following can be logically concluded from the passage above?
(A) The time it takes to record and analyze a signature makes the software impractical for everyday use.
(B) Computers equipped with the software will soon be installed in most banks.
(C) Nobody can gain access to a computer equipped with the software solely by virtue of skill at forging signatures.
(D) Signature-recognition software has taken many years to develop and perfect.(C)英语作文
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