练习:
1 .Why are ants compared to ecosystem engineers? 为什么蚂蚁叫生态系统工程师?
A Because they build their own nests. 因为他们建立自己的巢。
B Because they collect food. 因为他们收集食物。
C Because their activity affects the environment. 因为他们的活动影响环境。
D Because they are predators. 因为它们是掠食者。
2. As predators, ants作为食肉动物,蚂蚁
A prey on small as well as large animals. 捕食小型以及大型动物。
B collect nutritious food from the soil收集的土壤营养食品
C collect food as decomposers. 收集食物分解。
D prey on species much higher up the food chain. 捕食物种更高的食物链。
3. Dir Sanders study centered on how ants迪尔桑德斯的研究集中在如何蚂蚁
A can manage to thrive in huge numbers. 经营蓬勃发展,大量。
B defend their resources and territory against other predators. 捍卫自己的资源和领土对其他食肉动物。
C attack those invading animals for survival. 攻击入侵的动物生存。
D produce such a big impact on the environment. 产生这样一个大环境影响。
4. What does paragraph 6 tell us? 6段告诉我们什么?
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