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| 发布时间：2006-7-30 14:51:00 | 信息来源：本站原创 | 浏览： | |
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The clock had stopped because Winthrop had put some long glass tubes he was using for an experiment into the case for care. The quake had knocked the tubes over and blocked the pendulum (钟摆). Winthrop, therefore, had the exact time that the earthquake had hit Boston. He looked at the key on the floor. The quake had thrown it forward in the direction of the quake’s motion (运动) by a shock coming from the northwest, perhaps in Canada.
71. The text proves that _______.
A. the power of nature is terrible
B. earthquakes happen most often during nighttime hours
C. the direction of an earthquake can be discovered
D. universities study the cause of earthquakes
72. The text suggests that _________.
A. Boston was badly destroyed B. earthquakes are common in Boston
C. John Winthrop had difficulty sleeping D. John Winthrop was a scientist
73. Which of the following is true?________.
A. Some tubes were broken into pieces and stopped the old clock
B. The professor lit a candle because of power failure
C. Boston is in the southeast of Canada
D. The shocks were slight in one way
74. The earthquake happened ________.
A. several minutes before the professor awoke B. and the professor awoke at 4:15
C. in the centre of Boston D. when John Winthrop felt it
75. Choose the right order according to the text.
a. The bed was shaking and John Winthrop awoke.
b. John Winthrop looked attentively at this watch.
c. John Winthrop got up to light a candle.
d. The earthquake happened in Boston in 1755.
e. John Winthrop knew the quake’s direction.
f. John Winthrop knew the exact quake’s time.
g. John Winthrop looked at the key on the floor.
A. g, d, e, a, c, b, f B. d, a, c, b, f, g, e C. a, e, d, c, b, f, g D. e, d, g, b, c, a, f
Passage Four
Oceanography has been defined as “The application of all sciences to the study of the sea”.
Before the nineteenth century scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.
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 engineer had to know the depth profile (起伏形状) of the route to estimate the length of cable that had to be manufactured.
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 (测水深) 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.本新闻共 6页,当前在第 5页 1 2 3 4 5 6 |
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