TPO:艾尚托福阅读 第五期 TPO20-3 Fossil Preservation
日期:2018-05-09 15:42

(单词翻译:单击)

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艾尚托福阅读,我们一起背单词第5期:TPO20-3

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今天我们讲解托福TPO20-3 Fossil Preservation 的第1题到第6题需要重点记忆的单词

1. The word “agencies” in the passage is closest in meaning to
原文:
, chemical decay, and destruction make the odds against preservation very high.
重点单词:
attack v. 攻击;(CET4)
bacteria n. 细菌 (CET4)
decay v/n. 腐烂;腐坏 (CET4)
destruction n. 破坏;毁灭 (CET4)
erosion n. 侵蚀;腐蚀 (CET6)
geologic adj. 地理的;地质的 (CET4)
make the odds against 阻碍
preservation n. 保存;保留 (CET4)
A选项单词:combination n 结合;
B选项单词:problem n. 问题
C选项单词:force n. 力量
D选项单词:change n. 改变
根据语境:agencies=forces

2. In paragraph 1, what is the author’s purpose in providing examples of how organisms are destroyed?
题干单词:
destroy v. 破坏;消灭 (高中)
正确选项对应原文:
[When one considers the many ways [by which organisms are completely destroyed after death]], it is remarkable that fossils are as common as they are。
重点单词:
common adj. 普通的;普遍的 (高中/CET4)
正确选项:to emphasize how surprising it is that so many fossils exist (v. 存在)

3. The word “terrestrial” in the passage is closest in meaning to
原文:
[Although most fossils are found in marine sedimentary rocks], they are also found in terrestrial deposits .
重点单词:
marine adj. 海生的;海产的 (CET4)
sedimentary adj. 沉淀的 (托福)
terrestrial adj. 地球的;陆地的 (托福)
deposit n. 沉淀物;存款;定金 (CET4)
选项单词:
A. land n. 陆地 (初中)
B. protect v. 保护 (高中)
C. alternative adj./n. 供选择;交替
D. similar adj. 相似的
terrestrial = land

4. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?
原句:
The empty shell of a snail or clam may be left behind, and[ if it is sufficiently durable and resistant to dissolution], it may remain basically unchanged for a long period of time.
重点单词:
sufficiently adv. 充分地;足够地 (CET4)
durable adj. 耐用的;持久的(CET4)
resistant (resist v.) adj. 抵抗的;反抗的 (CET4)
dissolution (dissolve v.) n. 分解;溶解 (CET4)
正确选项:Empty snail or clam shells that strong enough not to dissolve may in their original state for a long time.

5.Why does the author mention “aragonite” in the passage?
正确答案对应的原文:
[Although aragonite has the same composition as the more familiar mineral known as calcite], it has a different crystal form, is relatively unstable, and in time changes to the more stable calcite.
重点单词:
composition n. 构成;成分;作文 (高中)
mineral n. 矿物 (高中)
crystal n. 晶体;水晶 (CET4)
stable adj. 稳定的 (高中)
正确选项:to explain that some marine organisms must undergo chemical changes in order to fossilize. (v. 石化)

6. The word “enhance” in the passage is closest in meaning to
原文:
many other processes may alter the shell of a clam or snail and enhance its changes for preservation.
原文单词:
alter v. 改变;更改 (CET4)
enhance v. 增强;提升;增加
重点单词:
process n. 过程 (高中)
选项单词:
control v. 控制 (高中)
limit v. 限制 (高中)
combine v. 联合 (高中)
increase v. 增加
enhance=increase

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重点单词
  • combinev. 结合,联合,使结合 n. 集团,联合企业,联合收割
  • clamn. 蛤,沉默寡言的人 vi. 挖蚌
  • destructionn. 破坏,毁灭,破坏者
  • remarkableadj. 显著的,异常的,非凡的,值得注意的
  • combinationn. 结合,联合,联合体
  • crystaln. 水晶,晶体 adj. 晶体的,透明的
  • stableadj. 稳定的,安定的,可靠的 n. 马厩,马棚,一批
  • dissolutionn. 分解
  • alternativeadj. 两者择一的; 供选择的; 非主流的 n. 替换
  • durableadj. 耐用持久的 n. (复)耐用品