大学英语四级考试阅读笔记(20)
Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition (考察), which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to a five-volume report, the last volume being published in 1895.
注：oceanography 最末一段与第一段首句都出现 oceanagraphy, 回环结构。
21. The passage implies that the telegraph cable was built mainly _________.
A) for oceanographic studies
B) for military purposes
C) for business considerations
D) for investigating the depths of the oceans
注：推理题。定位第三段,倒数第三行。选项 D 的内容出现在第四段，为窜段选项
For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that the question 'What is at the bottom of the oceans?' had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile (起伏形状) of the route to estimate the length of cable that had to be manufactured.
22. It was ________ that asked Maury for help in oceanographic studies.
A) the American Navy
B) some early intercontinental travellers
C) those who earned a living from the sea
D) the company which proposed to lay an undersea cable
注：细节题。定位第四段,选项 B和C是窜段选项
It was to Maury of the US Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings (测深) were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea.
23. The aim of voyages Maury encouraged in the 1840s was __________.
A) to make some sound experiments in the oceans
B) to collect samples of sea plants and animals
C) to estimate the length of cable that was to be made
D) to measure the depths of two oceans
注：1.细节题。定位第四段，第二行。
2.B 和 C 是窜段选项，A选项中的sound和文章中的sounding含义不同。
It was to Maury of the US Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings (测深) were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea.
24. 'Defied' in the 5th paragraph probably means ________
A) 'doubted' B) 'gave proof to'
C) 'challenged' D) 'agreed to'
注：词汇题。定位倒数第二段,defy 前后意思相反，可以推出24题答案为C
25. This passage is mainly about _________
A) the beginnings of oceanography
B) the laying of the first undersea cable
C) the investigation of ocean depths
D) the early intercontinental communications
注：主题题。主题关键词为oceanography
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Questions 1 to 5 are based on the following passage.
1. What the author discussed in the previous section is most probably about ____.
A) relationships between causes and results
B) classification of reasoning
C) some other common types of reasoning
D) some special type of reasoning
2. According to the passage, to do the "effect to effect" reasoning is to reason ____.
A) from cause to effect
B) from effect to cause
C) from effect to effect and on to cause
D) from effect to cause and on to another effect
3. A necessary cause is ____.
A) one without which it is impossible for the effect to occur
B) one of the causes that can produce the effect
C) one that is enough to make the effect occur
D) none of them
4. Your refrigerator is not working and you have found that the electric power has been cut off.
The power failure is a ____.
A) necessary cause B) sufficient cause
C) contributory cause D) none of them
5. This passage mainly discusses ____.
A) causal reasoning B) classification of cause
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