Summer is coming,and soon beaches will be full of the sounds of people having fun.If you can find a quieter spot of ocean and stick your ears under the water,you might hear many other sounds made by fish.
Unlike birds,which make sounds in the same way,Audrey Looby,a fish-sound researcher at the University of Florida,says that fish make sounds in different ways.Fish do not have specialised vocal cords or voice boxes.So,one of the most common ways they make sounds is through tribulation—like clicking their teeth or rubbing their pectoral fins(胸鰭)against other structures.Many others make sounds with their swim bladders,which they use primarily to stay level in the water.
Scientists are unsure how many fish make sounds,but some estimate that it might be as many as 22,000 types,which is two-thirds of about 34,000 known species.And those are just the sounds fish make on purpose—to call to mates,to let other fish know they're in trouble or to communicate that "this is my area of the reef,listen to how tough I sound so why don't you just swim away," Looby says.Fish also make passive sounds,such as chewing noises as they munch(大聲咀嚼)on seagrass or algae.
According to Looby,active and passive sounds are important because they convey a lot of information about what's going on to fish and to researchers.For example,let anyone who's listening know that there is a food source available.
With climate change making parts of the ocean heat up and become unlivable for fish in other ways,researchers say that fish sounds could help them preserve and restore habitats.For example,there are projects looking into whether piping in the sounds of a healthy reef into one that is dying might encourage fish to come back and populate it. "Learning about fish sounds lets us learn about underwater environments and hopefully manage them at the same time," Looby said.
(1)What is the second paragraph mainly about? DD
A.How fish use sounds.
B.Why fish make sounds.
C.What voice boxes are.
D.How fish make sounds.
(2)What happens to a fish because of its swim bladder function? CC
A.It can find a habitat.
B.It can click their teeth.
C.It can float in the water.
D.It can attract the other fish.
(3)Why might fish make sounds? BB
A.To find food sources.
B.To warn other animals.
C.To sound like a boat whistle.
D.To reduce the effects of environment.
(4)Why do scientists want to play healthy reef sounds in a dying reef? AA
A.To get fish to return to it.
B.To get scientists to find it.
C.To show that it is not safe.
D.To show how deep underwater it is.
【考點】說明文.
【答案】D;C;B;A
【解答】
【點評】
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發(fā)布:2024/4/20 14:35:0組卷:1引用:3難度:0.4
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D.It suggests that the local people are well educated.發(fā)布:2025/1/6 16:30:6組卷:0引用:1難度:0.5 -
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