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  3. Bottlenose dolphins can call each other by name when they whistle, making them the only animals besides humans know to recogniz

Bottlenose dolphins can call each other by name when they whistle, making them the only animals besides humans know to recogniz

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问题     Bottlenose dolphins can call each other by name when they whistle,
making them the only animals besides humans know to recognize such 1.______
identity information, scientists reported on Monday.
    Dolphins communicate as humans by calling each other by name, 2.______
scientists in Fife reported on Monday.
    Scientists have long known that dolphins’ whistling calls including repeated 3.______
information thought to be their names, but a new study indicates dolphins
recognize these names even when voice cues are removed in the sound. 4. ______
    St Andrews University researchers studying in Sarasota Bay off
Florida’s west coast Florida discovered bottlenose dolphins used names
rather than sound to identify each other.
    The three-years-study was funded by the Royal Society of London. 5.______
    Dr Vincent Janik, of the Sea Mammal Unit at St Andrews University,
said they conduced the research on wild dolphins. 6.______
    "We captured wild dolphins using nets when they came near the
shore," he said.
    "Then in the deep water we recoded their whistles before synthesizing 7.______
them on a computer with the caller’s voice features removed so that we
have a computer voice of a dolphin." 8.______
    "Then we played it back to the dolphins through an underwater speaker
and we found they responded coolly. This showed us that the dolphins 9.______
know each other’s signature whistle instead just the voice." 10.______
    "Now we know they have labels for each other like we do."
    The findings are published in the US journal the Proceedings of the
National Academy of Sciences (PNAS).
选项
答案years——year
解析 本题为名词误用。关于复合词的用法，three years study如果用连字符合成一个词， “year”要用单数形式。
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