unit4Section C(1).doc

Secti on C Text II Directions : Please read this section before e to class. Bird Brains The scene: a traffic light crossing ona university campus in Japan. Carrion crows 1 and humans line up 2 patiently, waiting for the traffic to halt. When the lights change, the birds hop in front of the cars and place walnuts, which they picked from the adjoining 3 trees, on the road. After the lights turn green again, the birds fly away and vehicles drive over the nuts, cracking them open. Finally, when it's time to cross again, the crows join the pedestrians and pick up their meal. Biologists already knew the corvine 4 family--it 1 小嘴乌鸦: 一种普通的欧洲乌鸦( 小嘴乌鸦), 有光滑的黑色羽毛 carrion 死肉, 腐肉 adj. 腐肉的, 似腐肉的, 吃腐肉的, 腐朽的, 令人作呕的 2(使) 排列起来;(使) 排成一行;(使) 排成长队;(使) 整队: The pupils lined up to board the school bus. 学生们排队上校车。 3 隔壁的,毗连的,毗邻的,贴邻的,邻接的,邻近的,接近的 4 【鸟类】乌鸦的,乌鸦似的 includes crows, ravens 5, rooks 6, magpies and jackdaws 8 --to be among the smartest of all birds. But this remarkable piece of behavior would seem to be a particularly acute demonstration of bird intelligence. Researchers believe they probably noticed cars driving over nuts fallen from a walnut tree overhanging 9a road. The crows already knew about dropping clams 10 from a height on the seashore to break them open, but found this did not work for walnuts because of their soft green outer shell. Other birds do this, although not with quite the same precision. In the Dardia Mountains of Greece, eagles can be seen carrying tortoises up toa great height and dropping them on to rocks below. Scientists have argued for decades over whether wild creatures, including birds, show genuine intelligence. Some still consider the human mind to be unique, with animals capable of only the simplest mental processes. But a new generation of scientists believes that creatures, 5 【鸟类】渡鸦 6 赌棍;白嘴鸦 8 寒鸦;穴鸟 9 overhang 悬于…之上,突出于…之上: A large lamp overhangs the hall. 大厅上吊着一盏大灯。 10蛤,蛤蜊:一种双壳纲通常穴居的海洋及淡水双瓣软体动物,包括帘蛤属和海螂属的成员,其中许多可食用 including birds, can solve problems b