GRE北美真题系列(十)E

Questions 18-22
    In a parking lot there are six parking spaces in a row, numbered 1 through 6 consecutively. Exactly five cars of five different colors-blue, green, red, silver, and tan-are to be parked in the spaces, one car to a space, according to the following conditions:
    The red car must be parked in 3.
    The blue car must be parked in a space next to the space in which the tan car is parked.
    The green car cannot be parked in a space next to the space in which the silver car is parked.
    18. If the tan car is parked in 2, which of the following must be true?
    (A) The blue car is parked in a space next to the space in which the silver car is parked.
    (B) The silver car is parked in a space next to the space in which the red car is parked.
    (C) The green car is parked in a space next to the space in which the blue car is parked.
    (D) The green car is parked in 6.
    (E) None of the cars is parked in 5.
    19. The silver car could be parked in any of the following spaces EXCEPT
    (A) 1
    (B) 2
    (C) 4
    (D) 5
    (E) 6
    20. If the green car is parked in 2, none of the cars can be parked in
    (A) 1
    (B) 3
    (C) 4
    (D) 5
    (E) 6
    21. Which of the following must be true of any acceptable parking arrangement?
    (A) There is an empty space next to the space in which the green car is parked.
    (B) There is an empty space next to the space in which the tan car is parked.
    (C) Either the blue car or the tan car is parked in a space next to 3.
    (D) One of the cars is parked in 2.
    (E) One of the cars is parked in 6.
    22. If the tan car is parked in 1, how many acceptable parking arrangements are there for the five cars?
    (A) 1
    (B) 2
    (C) 3
    (D) 4
    (E) 5
    23. Biochemists select for experimental study those types of organisms that are most suitable for solving the scientific problems that are of current interest to them. For this reason, it was not until recently that biochemists began to give considerable, attention to the biochemistry of insects.
    In the passage above, the author implies that
    (A) there was a recent shift in the scientific problems of interest to biochemists
    (B) scientists have recently made new contributions to knowledge by studying the biochemistry of insects
    (C) biochemists recently changed their primary criterion for selecting the type of organism to be studied
    (D) there was a recent increase in the number of individual organisms that biochemists use in their experiments
    (E) biochemists would today have less interest in studying insects if they had given more attention in the past to the biochemistry of insects
    24. If Wanda visits Albuquerque on a trip, she will also visit Santa Fe, Phoenix, and Tucson on that trip.
    If the statement above is true, which of the following statements must also be true?
    (A) If Wanda visits Santa Fe, Phoenix, and Tucson on a trip, she will also visit Albuquerque on that trip.
    (B) If Wanda visits Phoenix and Tucson on a trip, she will also visit Santa Fe on that trip.
    (C) If Wanda visits Tucson on a trip, she will also visit Phoenix on that trip.
    (D) If Wanda does not visit Tucson on a trip, she will not visit Santa Fe on that trip.
    (E) If Wanda does not visit Phoenix on a trip she will not visit Albuquerque on that trip.
    25. In a certain code, the digits from 0 to 9 inclusive are each represented by a different letter of the alphabet and each letter always represents the same digit, if the sum
       ALMA
    +  T I A
       JUAN
    holds when expressed in digits, all of the following can properly by inferred EXCEPT:
    (A) A cannot be 0.
    (B) A must be less than 5.
    (C) N must be even.
    (D) L+T must be greater than 8.
    (E) J must be greater than A by 1.
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