北美大讲堂 | 2022GMAT OG新题讲解（104）

北美大讲堂 | 2022GMAT OG新题讲解（104）

题号：662<complete the argument> 难度：Easy

According to a study, after a week of high-altitude living, twenty men had slimmed down. The men, middle-aged residents of low-altitude areas, had been taken to a research station at 2,650 meters (8,694 feet) above sea level. They had unrestricted access to food and were forbidden vigorous exercise, yet they lost an average of 1.5 kilograms (3.3 pounds) during their one-week stay. Clearly, the lower availability of oxygen at higher altitudes, or hypobaric hypoxia, can be said to have caused the weight loss, since __________.

根据一项研究，20位男性在高纬度地区呆了一周后体重减轻了。这些低纬度地区的中年男子被带到海拔2650米的地区。他们可以不受限制地获得食物，也禁止进行运动，然而他们在这一周平均减重1.5kg。很明显，在高海拔地区，低氧量／低压缺氧会导致体重减轻，因为________

解析：下面哪个可以合理的完成上述论据，这题需要我们整合文章信息，并加入合理的理由去支持是高纬度地区的低压缺氧导致人变瘦的。

Which of the following would, if true, most logically complete the argument?

A. a decrease in oxygen intake has been shown to depress appetite

低氧气会抑制人的食欲，该选项将低压缺氧和人体重减轻建立了一个间接关系——及抑制食欲，吃得少自然会变瘦，因此该选项为正确答案。

B. the men all participated in the same kinds of exercise during their stay

这些男人所参与的活动一致，该选项与低压缺氧无关，可排除。

C. the foods available to the men had fewer calories than the foods they usually ate 该选项提出了另一个可能会导致这些人体重减轻的原因——食物所含的卡路里更低，削弱了低压缺氧使人变瘦这一说法，因此排除该选项。

D. exercise at higher altitudes is more difficult than exercise at lower altitudes is

与低压缺氧无关，可排除该选项。

E. several weeks after returning home, the men still weighed less than they had before the study

我们不需要知道他们返回低纬度地区的体重变化，因此该选项内容属于无关信息，可以排除。