gwd boldface与support一石二鸟~

damonia

GWD21-Q33:

One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream.Accordingly, entrepreneurs have begun selling at gymnasiums and health clubs bottles of drinking water, labeled “SuperOXY,” that has extra oxygen dissolved in the water.Such water would be useless in improving physical performance, however, sincethe only way to get oxygen into the bloodstream so that it can be absorbed by the muscles is through the lungs.



Which of the following, if true, would serve the same function in the argument as the statement in boldface?

1. the water lost in exercising can be replaced with ordinary tap water
   
   
2. the amount of oxygen in the blood of people who are exercising is already more than the muscle cells can absorb
   
   
3. world-class athletes turn in record performances without such water
   
   
4. frequent physical exercise increases the body’s ability to take in and use oxygen
   
   
5. lack of oxygen is not the only factor limiting human physical performance
   答案是b，明白了，可是为什么e不对呢？
   我感觉就像缺口的水桶一样，有几块板都矮，只增长一块板不是也自然没有用么，唉，想不太明白了，请求nn解答吧~
   

damonia

恩，这么说还是有道理的，谢谢啦~

eDiisbotasky

boldface和support还是有区别的，E只是weaken了lack of oxygen 对limiting human physical performance的重要性，但boldface的作用是provide evidence to prove the drink is useless in improving physical performance。Function是完全不一样的。要注意读题目啊！

damonia

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