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发布时间：2006-06-23 11:55     点击：

19. In responding to Dr. Schillihng, Dr. Laforte employs which one of the following argumentative strategies?

(A) showing that the objections raised by Dr. Schilling have no bearing on the question of which of the two systems under consideration is the superior system.

(B) Calling into question Dr. Schilling's status as an authority on the issue of whether consumers' access to medical treatments is restricted in countries with nationalized health insurance.

(C) Producing counterexamples to Dr. Schilling's claims that nationalized health insurance schemes extract high human costs from consumers.

(D) Demonstrating that Dr. Schilling's reasoning is persuasive only because of his ambiguous use of the key word "consumer".

(E) Showing that the force of Dr. Schilling's criticism depends on construing the key notion of access in a particular limited way

20. A certain viral infection is widespread among children, and about 30percent of children infected with the virus develop middle ear infections, antibiotics, although effective in treating bacterial infections, have no effect on the virus. Yet when middle ear infections in children infected with the virus are treated with antibiotics. The ear infections often clear up.

Which one of the following most helps to explain the success of the treatments with antibiotics?

(A) Although some types of antibiotics fail to clear up certain infections, other types of antibiotics might provide effective treatment for those infections.

(B) Children infected with the virus are particularly susceptible to bacteria that infect the middle ear.

(C) Many children who develop middle ear infections are not infected with the virus.

(D) Most viral infections are more difficult to treat than are most bacterial infections.

(E) Among children not infected with the virus, fewer than 30percent develop middle ear infections.

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