[讨论]gwd28-3-6

spongebobmn

主要是第二题问那个关于实验的是对的，偶还是觉得A好。第三段里说：Even when demonstrator hens reacted with obvious disgust to a specific food, via vigorous head shaking and bill wiping, there was no evidence that observers subsequently avoided eating that food. 这里直接说明鸡对讨厌的食物是会有强烈反应的。，而且没有证据表明其他鸡也学会了避开这些食物
A: Only a small number of observer hens appeared to learn to avoid food that was demonstrated by other hens to be noxious。 反过来想，如果有很多鸡都避开讨厌的食物，那就说明鸡是可以学会避开讨厌的食物的，和文中的结论显然不符。正因为只有少数鸡不吃这类食物，才说明证据不足啊
E. Demonstrator hens altered their behavior less obviously in response to noxious foods than in response to highly palatable foods。文中只提到鸡对讨厌食物的反应。再提到对可口食物的反应时，只是说“react favorably ”，丝毫没有提到反应的程度。所以不能说鸡对可口食物的反应要更明显。
所以偶选A.