GWD - CR - 大全 附解释(7)

shopper E. none of the people who conducted the research were employees of the FoodBasket supermarket ------------------------------------------------------------------------------------------------------------

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GWD-TN-12 T-4-Q2

Twenty years ago, Balzania put in place regulations requiring operators of surface mines to pay for the reclamation of

mined-out land. Since then, reclamation technology has not improved. Yet, the average reclamation cost for a surface coal mine being reclaimed today is only four dollars per ton of coal that the mine produced, less than half what it cost to reclaim surface mines in the years immediately after the regulations took effect.

Which of the following, if true, most helps to account for the drop in reclamation costs described?

A. Even after Balzania began requiring surface mine operators to pay reclamation costs, coal mines in Balzania

continued to be less expensive to operate than coal mines in almost any other country. B. In the twenty years since the regulations took effect, the use of coal as a fuel has declined from the level it was at

in the previous twenty years. C. Mine operators have generally ceased surface mining in the mountainous areas of Balzania because reclamation

costs per ton of coal produced are particularly high for mines in such areas. D. Even after Balzania began requiring surface mine operators to pay reclamation costs, surface mines continued to

produce coal at a lower total cost than underground mines. E. As compared to twenty years ago, a greater percentage of the coal mined in Balzania today comes from surface

mines.

原文要解释的是：今天表层煤矿回填费用的减低。（相比20年前）。C说的是现在回填费用高的山区不开采煤矿了，不需要回填拉。这样需要回填的都是费用低的，所以平均费用就降下来啦。故为答案。A和别的国家比，错。B讲的是煤的用途比例变化，无关，错。D和地下煤比，错。E 讲的是表层煤量的变化，无关。

与量有关的题目好像有共通点，有时间总结一下。

Q13 GWD-24-35（CD-10-35）

The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block

cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite. Which of the following is an assumption on which the argument depends?

A. Newborn mice do not normally ingest any substance other than their mothers‘ milk. B. Cannabinoids are the only substances in mammals‘ milk that stimulate the appetite.

C. The mothers of newborn mice do not normally make any effort to encourage their babies to feed. D. The milk of mammals would be less nutritious if it did not contain cannabinoids.

E. The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the

appetite. T-4-Q14 GWD-13-38

Frobisher, a sixteenth-century English explorer, had soil samples from Canada‘s Kodlunarn Island examined for gold content. Because high gold content was reported, Elizabeth I funded two mining expeditions. Neither expedition found any gold there. Modern analysis of the island‘s soil indicates a very low gold content. Thus the methods used to determine the gold content of Frobisher‘s samples must have been inaccurate.

Which of the following is an assumption on which the argument depends?

A. The gold content of the soil on Kodlunarn Island is much lower today than it was in the sixteenth century. B. The two mining expeditions funded by Elizabeth I did not mine the same part of Kodlunarn Island.

C. The methods used to assess gold content of the soil samples provided by Frobisher were different from those

generally used in the sixteenth century. D. Frobisher did not have soil samples from any other Canadian island examined for gold content. E. Gold was not added to the soil samples collected by Frobisher before the samples were examined.

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