Unformatted text preview: ormation in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information 在 ○ Running water was the best power source for factories since it could keep machines operating continuously but since it was abundant only in Lancashire and Scotland, most mills and factories that were located elsewhere could not be water driven在 ○ The disadvantage of using waterpower is that streams do not necessarily flow in places that are the most suitable for factories which explains why so many water—powered grain and textile mills were located in undesirable places ○ Since machines could be operated continuously only where running water was abundant, grain and textile mills as well as other factories tended to be located only in Lancashire and Scotland 在 ○ Running water was the only source of power that was suitable for the continuous operation of machines, but to make use of it factories had to be located where the water was, regardless of whether such locations made sense otherwise.
2. Which of the following best describes the relation of paragraph 2 to paragraph 1? ○Paragraph 2 shows how the problem discussed in paragraph 1 arose.
○Paragraph 2 explains how the problem presented in paragraph 1 came to be solved 在
○Paragraph 2 provides a more technical discussion of the problem introduced in paragraph 1.
○Paragraph 2 shows why the problem discussed in paragraph 1 was especially important to solve. 3. The word exploited in the passage is closest in meaning to ○utilized
[email protected] 在在在在在在 www.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 ○fully understood
4. The word vastly in the passage is closet in meaning to ○quickly
5. According to paragraph 2在the atmospheric engine was slow because ○it had been designed to be used in coal mines
○the cylinder had to cool between each stroke
○it made use of expanding steam to raise the piston in its cylinder
○it could be operated only when a large supply of fuel was available
Paragraph 2: The source had long been known but not exploited. Early in the century, a pump had come into use in which expanding steam raised a piston in a cylinder 在 and atmospheric pressure brought it down again when the steam condensed inside the cylinder to form a vacuum 在 This “atmospheric engine,” invented by Thomas Savery and vastly improved by his partner 在 Thomas Newcomen, embodied revolutionary principles, but it was so slow and wasteful of fuel that it could not be employed outside the coal mines for which it had been designed. In the 1760s, James Watt perfected a separate condenser for the steam, so that the cylinder did not have to be cooled at every stroke; then he devised a way to make the piston turn a wheel and thus convert reciprocating (back and forth) motion into rotary motion. He thereby transformed an inefficient pump of limited use into a steam engine of a thousand uses. The final step came when steam was introduced into the cylinder to drive the piston backward as well as forwar...
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- Fall '13