• 2022-06-05
    Why did the U.S. Navy set up underwater microphones around the world in the 1960s
    A: To listen for changes in ocean structure.
    B: To listen for changes of ocean currents or volcanic activity.
    C: To make sure whether there was a giant squid deep in the ocean.
    D: To follow the track of the Soviet warships under water.
  • D

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      WElearn A: Species B: overlook C: threat D: hostile E: circulates F: Survival G: landmark H: learn I: extinct J: expertise K: assume L: habitat M: initiated N: fit O: vital<br>格式一:<br>World Ocean Day in the environmental calendar began on 8 June 1992. It was (1)_________by a group of environmentalists at the Earth Summit in Rio De Janeiro, Brazil. On this day, activities take place around the world. These let us appreciate how important the oceans are to us and how they are essential for our (2)_______________. It is a day for us to (3)__________about the diversity of life in the oceans and how our actions are killing many species. The day also hopes to raise awareness that our oceans are a(n) (4)_____________part of keeping our planet at the right temperature.<br>The world’s oceans are under serious (5)___________today. Over-fishing, pollution and global warming are just a few of the things damaging the seas. Climate change means sea levels are rising. Scientists (6)____________that within fifty years, many of today’s countries will be under water. A warming world also changes the way ocean water (7)______________. If parts of the world become too warm, ocean temperatures could change and cause havoc (大破坏) to the world’s weather patterns. Changing water temperatures could also make many marine species (8)_____________. Oceans are becoming saltier because of global warming. This is killing many coral reefs, which lead to many (9)_____________ of ocean life dying. We really can’t (10)______________how our lives damage the oceans.

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      中国大学MOOC: The Pacific Ocean is bigger than the Indian Ocean.

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      The ocean ______ 70 percent of the Earth’s surface, but contains about 20 percent of the Earth’s total estimated species. A: takes up B: fixes up C: stirs up D: patches up

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      Gulliver’s Travels, was published in 1726, under the title of Travels into ______, by Samuel Gulliver. A: his hometown with families B: his neighbour continent C: a far ocean voyage D: Several Remote Nations of the World

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      But I do make sure that I have a broad ______ from which to make decisions. A: horizon B: continent C: vertical D: ocean