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A.Chirping away. B.Zebra finches and their life. C.Frequencies of birdsongs. D.Birdsongs as communication.
参考答案： B 答案解析： This research deals with what's called directed communication, when the communicator, or sender, focuses the message for a specific audience. 可以看出。directed communication直接沟通，B强调了一个特殊的群体，就是指的对方。
2The expression "directed communication" in the last paragraph means communication in which
A.the communicator sends messages to himself. B.the message sender has a specific audience. C.two communicators send messages to each other. D.mothers talk to their babies in their mother tongue.
参考答案： D 答案解析： They spent more time listening to the concert version of their mates' songs, this suggests that after a while, females learn to recognize - and prefer - the songs of their mates. Scientists then studied the brains of the females. 雌鸟通过这些歌声，在追求者和伴侣间做选择。
3What is meant by "concert songs" in paragraph 7?
A.Songs sung by zebra finches at a concert. B.Songs sung by female finches for male finches C.Songs sung by male finches to other finches. D.Songs sung by male finches for female finches
参考答案： A 答案解析： 通过雄鸟变化声音来吸引雌鸟，就可以推出这种方式是雌鸟喜欢的。
4What did the researchers find in their study of female zebra finches?
A.Female finches liked songs male finches sang for them. B.Female finches only liked songs male finches sang for their mates C.Female finches liked to listen to songs from both speakers, D.Female finches chose the best male singers as their mates.
参考答案： C 答案解析： These brain areas may be involved in recognizing and eva luating the songs, and storing the memories of them. This research deals with what's called directed communication, when the communicator, or sender, focuses the message for a specific audience.可见，雄鸟用变化歌声来吸引雌性的注意。所以C是正确答案。
5Which of the following is true about birdsongs?
A.Female zebra finches are too shy to sing before males. B.Male zebra finches sing louder than females. C.Male zebra finches change their songs to attract females. D.Female zebra finches like to listen to unknown males sing 3、The Robot Man According to Hans Moravec, universal robots will take over all the physical activities that we engage in, leaving us with little to do. Moravec sees four generations on the road to true universal robots. The first generation will be here by 2010 and will consist of free-ranging robots that can navigate by building an internal mental map of their surroundings. In new situations they'll be able to adapt, unlike today's mobile industrial robots. These robots will have the computing power,to cope with simple speech and text recognition, and will be used for tasks such as domestic cleaning. The second generation will arrive around 2020 and will be distinguished by the ability to learn. Second generation robots are programd with sets of primitive tasks and with feedback that provide "pleasure" and "pain" stimuli. For example, a collision provokes a negative response, a completed task would be positive. Move forward another ten years to 2030 and you get to generation three. This robot can build internal simulations of the world around it. Before= beginning a task, it can imagine what will happen in order to predict problems. If it has a free moment, it can repl
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