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  3. The ocean is heating up. That’s the conclusion of a new study that finds that Earth’s oceans now【K1】a ______heat at twice the ra

The ocean is heating up. That’s the conclusion of a new study that finds that Earth’s oceans now【K1】a ______heat at twice the ra

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问题     The ocean is heating up. That’s the conclusion of a new study that finds that Earth’s oceans now【K1】a ______heat at twice the rate they did 18 years ago. Around half of ocean heat intake since 1865 has taken place since 1997, researchers report online in Nature Climate Change.
    Warming waters are known to【K2】c______to coral bleaching (珊瑚白化) and they take up more space than cooler waters, raising sea【K3】l______. While the top of the ocean is studied, its depths are more difficult to【K4】e______(探测). The researchers gathered 150 years of ocean temperature data in order to get a better【K5】p______ of heat absorption from surface to seabed. They gathered together temperature readings collected by everything from a 19th century【K6】v______(航海) of British naval ships to modern automated ocean probes. The extensive data sources, 【K7】c______ with computer simulations (计算机模拟), created a timeline of ocean temperature changes, including cooling from volcanic outbreaks and warming from fossil fuel【K8】e______.
    About 35 percent of the heat taken in by the oceans during the industrial era now residents at a【K9】d ______of more than 700 meters, the researchers found. They say they’re【K10】u______ whether the deep-sea warming canceled out warming at the sea’s surface.
【K10】
选项
答案unsure
解析 结合后面的宾语从句的引导词whether，故为unsure。
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