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单选题
A
Storm.
B
Big tides.
C
Underwater earthquakes.
D
Sunrises and sunsets.
参考答案
参考解析
解析：
[考点]细节题。录音中明确提到“A tidal wave is caused by an underwater earthquake”，故C项正确。
【听力原文】
A tidal wave is a very large and very destructive wall of water that rushes in from the ocean toward the shore. Many scientists call these huge waves tsunami.
In Japanese tsunami means a “storm wave”. But do you know that tidal waves are not caused by storms and that they are not true tides at all?
[28] A true tide is the regular rise and fall of ocean waters, at definite times each day, but a tidal wave comes rushing in suddenly and unexpectedly. [29] A tidal wave is caused by an underwater earthquake. Scientists call the underwater earthquake a seaquake. The word “seaquake” is made up of two words, the word “sea” and the word “quake” which means “to shake”.
When a seaquake takes place at the bottom of the ocean, the ocean floor shakes and trembles, and sometimes the ocean floor shifts. It is this shifting that produces the tidal wave. The tidal wave begins to move across the sea at great speed.
Questions 27 to 29 are based on the passage you have just heard.
27. What is the subject of this passage?
28. What is a tide?
29. What is the cause of tidal waves?
[考点]细节题。录音中明确提到“A tidal wave is caused by an underwater earthquake”，故C项正确。
【听力原文】
A tidal wave is a very large and very destructive wall of water that rushes in from the ocean toward the shore. Many scientists call these huge waves tsunami.
In Japanese tsunami means a “storm wave”. But do you know that tidal waves are not caused by storms and that they are not true tides at all?
[28] A true tide is the regular rise and fall of ocean waters, at definite times each day, but a tidal wave comes rushing in suddenly and unexpectedly. [29] A tidal wave is caused by an underwater earthquake. Scientists call the underwater earthquake a seaquake. The word “seaquake” is made up of two words, the word “sea” and the word “quake” which means “to shake”.
When a seaquake takes place at the bottom of the ocean, the ocean floor shakes and trembles, and sometimes the ocean floor shifts. It is this shifting that produces the tidal wave. The tidal wave begins to move across the sea at great speed.
Questions 27 to 29 are based on the passage you have just heard.
27. What is the subject of this passage?
28. What is a tide?
29. What is the cause of tidal waves?
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