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发布时间：2006-06-23 11:55     点击：

(C) The average number of years that staff members stay on at a given job varies considerably from one hospital to another.

(D) Approximately the same surgical procedures were performed in each of the hospitals covered in the studies.

(E) Mortality rates for hospital patients do not vary considerably from one region of the country to anther.

Questions 3-4

The United States government generally tries to Protect valuable natural resources. But one resource has been ignored for too long. In the United States, each bushel of corn produced might result in the loss of as much as two bushels of topsoil. Moreover. In the last 100 years, the topsoil in many states. Which once was about fourteen inches thick, has been eroded to only six or eight inches. Nonetheless, federal expenditures for nationwide soil conservation programs have remained at ridiculously low levels. Total federal expenditures for nationwide soil conservation programs have been less than the allocations of some individual states.

3. Which one of the following best expresses the main point of the argument?

(A) Corn is not a cost-effective product and substitutes should be found where possible.

(B) A layer of topsoil only six to eight inches thick cannot support the continued cultivation of corn.

(C) Soil conservation is a responsibility of the federal government. not the states.

(D) The federal government's expenditures for soil conservation in the various states have been inequitable.

(E) The federal government should spend much more on soil conservation than it has been spending.

4. In stating the argument. The author does which one of the following?

(A) makes a detailed statistical projection of future topsoil loss

(B) makes a generalization about total reduction in topsoil depth in all states

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