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no.12
4. reading part: priority effects
environment before the other species come and avoid them to utilize the habitat.
listening part:
alter the
?priority effects occur when a species that arrives first at a site impacts a species that arrives
?later by reducing the availability of space or resources. the species coming first may
there’s a kind of small ants(文中始终未给出该蚂蚁名称), when they first arrive a new habitat, say an “askentia(音) tree”, their unique habit is to eat part of the tree which produces nectar, because they don’t rely on it. they are altering the environment before any other species come.
there is a kind of bigger ants, they’re more aggressive and can easily occupy the trees as they want, and can force the smaller ants to leave. however, they rely on the nectar produced by “askentia” tree very much. so the smaller ants stop the tree producing nectar to avoid the bigger ants to take up the tree, so that they can stay living there.
how does the example in the listening part explain the concept of priority effects?
no.5
学校要建个休息室给不住学校的学生用，可以放书，有locker，放一些bus schedule。男生不同意一：住学校的同学也需要，因为宿舍很远。图书馆已经有locker，不需要再建。二：没必要专门为放bus schedule建休息室，网上电话都可以查。
passage 1
题材：科技类
题目：the history of pencil
题型：填空6+判断7
文章大意：石墨的发现与应用
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