Reading passage (Câu 20–24)
Tsunamis should not be confused with storm surges, which are domes of water that rise underearth hurricanes or cyclones and cause extensive coastal flooding when the storms reach land. Storm surges are particularly devastating if they occur at high tide. A cyclone and accompanying storm surges killed an estimated 500,000 people in Bangladesh in 1970. The tsunami which struck south and southeast Asia in late 2004 killed over 200 thousand people.
What is the greatest speed of tsunami travelling across the deep ocean?
What is the greatest speed of tsunami travelling across the deep ocean?
Chọn một phương án bên dưới để kiểm tra đáp án ngay:
Đáp án chính thức: D
Hướng dẫn giải chi tiết
[AI-attributed reasoning, not printed in source] The question asks about the greatest speed of a tsunami travelling across the deep ocean. Tsunamis travel at speeds up to about 800 kilometres an hour in the deep ocean (speed increases with water depth), which matches option D. Options A (150,000 km/h), B (200 km/h) and C (700 km/h) do not state the greatest speed given in the passage. Note: the paragraph of the passage containing the speed detail (paragraph 1) is not included in the supplied page-4 excerpt, which only shows the final paragraph about storm surges; the answer D is consistent with the standard tsunami fact referenced by the passage.