题型分类:推论题
题干分析:定位词sedentary foragers;利用定位词定位到第二段和第三段中有关sedentary foragers的内容。第二段第三句 Their high-protein, low-carbohydrate diets result in low body-fat levels, which are commonly associated with low fertility in women. 第三段第二句 A diet higher in wild cereals produces proportionally more body fat, leading to higher fertility among women. 由此可以推出早期的游牧民族饮食含有高蛋白high-protein,而sedentary foragers的饮食主要是wild cereals。
选项分析:
B选项说sedentary foragers比起游牧民族较少食用蛋白质。对应第二段第三句和第三段第二句。
A选项说sedentary foragers的饮食比起游牧民族的饮食,包含较少的wild cereal,而第三段第二句说a diet higher in wild cereals,证明该选项恰恰反了。
C选项说sedentary foragers比起游牧民族体能更加活跃。而第三段第一句说the adoption of a more settled existence in areas说明sedentary foragers采用了安定的生活方式。
D选项说sedentary foragers比游牧民族更可能母乳哺育他们的婴儿。而第三段第三句说 Cereals, which are easy to digest, would have supplemented and then replaced mother's milk as the primary food for older infants. 说明他们可以使用了cereals代替了母乳喂养大些的婴儿,因此比起游牧民族,他们的母乳哺育应该是缩短了的。所以该选项说反了。
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