单项选择题

Questions 10—11 are based on the following:
Antinuclear activist: The closing of the nuclear power plant is a victory for the antinuclear cause. It also represents a belated acknowledgment by the power industry that they cannot operate such plants safely.
Nuclear power plant manager: It represents no such thing. The availability of cheap power from nonnuclear sources, together with the cost of mandated safety inspections and safety repairs, made continued operation uneconomic. Thus it was not safety considerations but economic considerations that dictated the plant’s closing. Which one of the following, if true, most strongly supports the activist’s claim of victory

A. The plant had reached the age at which its operating license expired.
B. The mandate for inspections and repairs mentioned by the manager was recently enacted as a result of pressure from antinuclear groups.
C. The plant would not have closed if cheap power from nonnuclear sources had not been available.
D. Per unit of electricity produced, the plant had the highest operating costs of any nuclear power plant.
E. The plant that closed had been able to provide backup power to an electrical network then parts of the network became overloaded.

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单项选择题The cards in a deck are numbered consecutively from 1 to 20. If some cards are red and some cards are black, what is the probability of drawing a red card(1) The odd-numbered cards are all red.(2) The even-numbered cards are all black.

单项选择题The reasoning in the manger’s argument is flawed because the argument

A. fails to acknowledge that the power industry might now believe nuclear power plants to be unsafe even though this plant was not closed for safety reasons
B. overlooks the possibility that the sources from which cheap power is available might themselves be subject to safety concerns
C. mistakes the issue of what the closure of the plant represents to the public for the issue of what the managers’ reasons for the closure were
D. takes as one of its premises a view about the power industry’s attitude toward nuclear safety that contradicts the activist’s view
E. counts as purely economic considerations some expenses that arise as a result of the need to take safety precautions