Dạng bài Đọc hiểu lớp 12
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct anstver to each of the questions.
In addition to the greatest ridges and volcanic chains, the oceans conceal another form of undersea mountains: the flat-topped seamount. No marine geologist even suspected the existence of these isolated mountains until they were discovered by geologist Harry H. Hess in 1946. He was serving at the time as a naval officer on a ship equipped with a fathometer. Hess named these truncated peaks after the nineteenth-century Swiss-born geologist Arnold Guyot, who had served on the faculty of Princeton University for thirty years. Since then hundreds of guyots have been discovered in every ocean but the Arctic. Like offshore canyons, guyots present a challenge to oceanograpliic theory. They are believed to be extinct volcanoes. Their flat tops indicate that they once stood above or just below the surface, where the action of waves leveled off their peaks. Yet today, by definition, their summits are at least 600 feet below the surface, and some are as deep as 8,200 feet. Most lie between 3,200 and 6,500 feet deep. Their tops are not really flat but slope upward to a low pinnacle at the center dredeing from the tops of guyots which have recovered basalt and coral rubble, and that would be expected from the eroded tops of what were once islands. Some of this material is over 80 million years old. Geologists think the drowning of the guyots involved two processes: the great weight of the volcanic mountains depressed by the sea íloor rose beneath them, and the level of the sea rose a number of times, especially when the last Ice Age ended, some 8,000 to 11,000 years ago.
Notes:
- seamount (n): is a mountain rising from tlie ocean sea floor that does not reach to the water’s surface (sea level).
- guyot (n): an isolated underwater volcanic mountain (seamount), with
a flat top over 200 meters below the surface of the sea.
- pinnacle (n): the top part of a mountain.
Trả lời cho các câu 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 dưới đây:
Đáp án đúng là: B
Đáp án cần chọn là: B
Đáp án đúng là: C
Đáp án cần chọn là: C
Đáp án đúng là: A
Đáp án cần chọn là: A
Đáp án đúng là: D
Đáp án cần chọn là: D
Đáp án đúng là: B
Đáp án cần chọn là: B
Đáp án đúng là: B
Đáp án cần chọn là: B
Đáp án đúng là: C
Đáp án cần chọn là: C
Đáp án đúng là: A
Đáp án cần chọn là: A
Đáp án đúng là: B
Đáp án cần chọn là: B
Đáp án đúng là: C
Đáp án cần chọn là: C
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