说到托福阅读备考，TPO是必不可少的备考神器，通过TPO练习来更好的适应阅读考试的节奏。本文小编带来的托福阅读笔记是TPO27 Predator-Prey Cycles的内容，希望能够与正在备考的大家一起进步。
TPO27 Predator-Prey Cycles
文章题材：自然科学——捕食者-被捕食者循环
常见词汇：
essential [i'senʃəl] n. 要素，要点adj. 必要的，重要的
dominate ['dɔmineit] v. 支配，占优势，俯视
inadequate [in'ædikwit] adj. 不充分的，不适当的
decline [di'klain] n. 衰微，跌落; 晚年v. 降低，婉谢
diverse [dai'və:s] adj. 不同的，多种多样的
observable [əb'zə:vəbl] adj. 觉察得到的;看得见的;显著的 n. 可观察量;
isolated ['aisəleitid] adj. 分离的，孤立的
availability [ə.veilə'biliti] n. 有效，有用，有益;可得到的人(或物)
characteristic [.kæriktə'ristik] adj. 特有的，典型的n. 特性，特征，特
compete [kəm'pi:t] vi. 竞争，对抗，比赛
易错题解析：
Paragraph 1: How do predators affect populations of the prey animals? The answer is not as simple as might be thought. Moose reached Isle Royale in Lake Superior by crossing over winter ice and multiplied freely there in isolation without predators. When wolves later reached the island, naturalists widely assumed that the wolves would play a key role in controlling the moose population. Careful studies have demonstrated, however, that this is not the case. The wolves eat mostly old or diseased animals that would not survive long anyway. In general, the moose population is controlled by food availability, disease and other factors rather than by wolves.
1.In paragraph 1, why does the author discuss the moose and wolves on Isle Royale?
O To provide an example of predators moving to new habitats by following migrating prey
O To show that the interactions between predator populations and prey populations are not always might be expected
O To suggest that prey populations are more influenced by predation than food availability and disease
O To argue that studies of geographically isolated populations tend not to be useful to naturalists
题型：事实信息题。答案是(B)
解析：对应文章的第四句，Careful studies…not the case.这句话前面说人们觉得狼对控制鹿的数量控制起到了重要作用，这句话对其进行了否定，对应了B选项。A与原文没有关系。C与原文第一段最后一句话矛盾。D也不对。
14 Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
The relationships between predators and prey are complex.
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Answer Choices
O Studies of the interactions between wolves and moose on Isle Royale in Lake Superior reveal that wolf predation is not the primary factor controlling the moose population.
O Predators help maintain biological diversity by limiting populations of a dominant competitor species, thereby preventing that species from excluding others.
O A species’ population tends to rise and falls in a cycle pattern if the food supply for the population is limited, or if the population has a major predator.
O Ecologists are interested in studying predator-prey population cycles because understanding how predators and prey interact will allow better wildlife management programs.
O In predator-prey population cycles, predator populations increase or decrease following similar population changes in the species they prey on.
O The removal of sea stars reduces the diversity of the community in which they are predators, and is therefore a bad idea.
题型：文章小结题。答案是(C)(D)(E)
解析：A对应原文1-3段，虽然到第二段为止，都是符合这个选项的，但是第三段已经对这个进行了否定，错误，不选。B虽然意思正确，但是原文没有提到生态学家要研究捕食者和被捕食者的关系的目的，不选。C正确，选，对应原文最后一段。D正确，选，原文第二段已经表达了这句话了，后面也不断地重复。E正确，选，对应原文倒数第二段。F选项缺少了一环----双壳动物，语义表达不完整，不选。
以上就是小编带来的托福阅读笔记之TPO27 TPO27 Predator-Prey Cycles,希望能够和备考的大家一起学习。更多托福考试资讯请关注前程百利。
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