托福机经是什么_2018年2月26日GRE逻辑机经预测
Each of two particular inspection systems that are based on different principles would detect all product flaws but would also erroneously reject three percent of flawless products.Assuming there is no overlap between the products erroneously rejected by the two systems and also no interference between the systems if both operate，using both systems and rejecting only those products found flawed by both would be a way of avoiding all erroneous rejections.
Which of the following most precisely characterizes the reasoning in the argument?
(A)The reasoning is conclusive，that is，the conclusion cannot be false if the statements offered in its support are true.
(B)The reasoning is strong but not conclusive，if the statements offered in support of the conclusion are true，they provide good grounds for that conclu-sion，though it is possible that additional infor-mation might weaken the argument.
(C)The reasoning is weak; the statements offered in support of the conclusion，though relevant to it，by themselves provide at best inadequate grounds for the conclusion.
(D)The reasoning is flawed in that the conclusion is no more than a paraphrase of one of the pieces of evidence offered in its support.
(E)The reasoning is flawed in that the argument treats evidence that a factor is necessary to bring about an event as if it were evidence that the factor is sufficient to bring about that event.
In recent years，there has been a dramatic decline in the population of the shrike，a predatory bird that inhabits flat land，such as farms and pastures.Some ornithologists hypothesize that this decline is due to the introduction of new，more effective pesticides to control the insect species on which shrikes prey.
The answer to which of the following questions is NOT relevant to evaluating the ornithologists" hypothesis?
(A)Was there a decline in the shrike population before the new pesticides were first used?
(B)Have shrike populations declined sig