Some people prefer to spend their free time with a group of friends. Others prefer to spend their free time with just one person at a time. Which do you prefer?
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Do you prefer to live in a residence where there are strict rules (such as rules against making loud noises at night), or do you prefer to live in a residence without strict rules.
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Some people choose to go to a school which is close to home so they can keep their old friends. However, other people like to study far away from home so they can make new friends. Which do永州羊羔疯临床治疗方法 you prefer and why?
【名词解释】：search image(搜寻印象)：by多次捕食preys，predators can memorize the image of a kind of preys。With the image，predators can tell preys easily and catch them efficiently。
【教授举例】：教授举了一个关于birds的例子。A sort of caterpillars is green a癫痫哪里治疗的好nd lives on green leaves, and thus it is difficult for birds to tell at first，所以鸟就吃得少。Later, birds developed search images of caterpillars,and can easily distinguish caterpillars according to their special head parts. Thus they prey a lot.