Mountain climbing, although a dangerous sport, does not normally result in injury to the experienced climber.
In the past ten years there have been improvements in mountain-climbing techniques as well as in mountain-climbing equipment.
Although the rate of mountain-climbing injuries has increased, the rate of mountain-climbing deaths has not changed.
即文中出现了一个奇怪或矛盾的现象,题目要求给予解释或调和。这在GMAT逻辑中是司空见惯的解释题。
又比如:
At a certain period in Earth s history, its atmosphere contained almost no oxygen, although plants were producing vast quantities of oxygen. As a way of reconciling these two facts, scientists have hypothesized that nearly all of the oxygen being produced was taken up by iron on Earth s surface. Clearly, however, this explanation is inadequate. New studies show that the amount of iron on Earth s surface was not sufficient to absorb anywhere near as much oxygen as was being produced. Therefore, something in addition to the iron on Earth s surface must have absorbed much of the oxygen produced by plant life.
In the argument given, the two portions in boldface play which of the following roles?
The first is a claim made by the argument in support of a certain position; the second is that position.
The first is a judgment made by the argument about a certain explanation; the second is that explanation.
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