学进去-教育应平等而普惠
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类型:阅读理解
难度系数:0.65
所属科目:高中英语

Scientists looking to uncover the mysteries of the underwater world have more valuable information thanks to an international team that has produced a list of species confirmed or expected to produce sound underwater.

Led by Audrey Looby from the University of Florida, the Global Library of Underwater Biological Sounds working group collaborated with the World Register of Marine Species to document 729 mammals (哺乳动物), fishes, and invertebrates (无脊椎动物) that produce active or passive sounds. In addition, the list includes another 21,911 species that are considered to likely produce sounds.

“With more than 70% of the Earth’s surface covered by water, most of the planet’s habitats are aquatic, and there is a misconception that most aquatic organisms are silent. The newly published comprehensive digital database on what animals are known to make sounds is the first of its kind and can revolutionize marine and aquatic science,” the researchers said.

“Listening to underwater sounds can reveal a lot of information about the species that produce them and is useful for a variety of applications, ranging from fisheries management, invasive species detection to assessing human environmental impacts,” said Looby, who also co-created FishSounds, which offers a collection of fish sound production research records.

The team’s research was published in Scientific Data and involved 19 authors from six countries. “Understanding how marine species interact with their environments is of global importance, and this data being freely available is a major step toward that goal,” said Kieran Cox, a member of the research team.

“Most people are familiar with whale or dolphin sounds but are often surprised to learn that many fishes and invertebrates use sounds to communicate, too,” Looby said. “Our database helps demonstrate how widespread underwater sound production really is across a variety of animals, but we still have a lot to learn.”

1.What does the underlined word “aquatic” in paragraph 3 probably mean?
A.Outdoor.B.Over-crowded.
C.Well-protected.D.Underwater.
2.What is people’s misunderstanding according to the text?
A.Most fishes can’t make sounds.
B.Different species can communicate.
C.Mammals can live in water.
D.Ocean animals can’t get onto the land.
3.What is the goal mentioned by Kieran Cox?
A.To document ocean animals’ sounds.
B.To set up a free database for scientists.
C.To learn how ocean animals communicate.
D.To publish the research in Scientific Data.
4.What is the purpose of the text?
A.To call on people to protect ocean animals.
B.To introduce the finding of a research team.
C.To list the animals that can produce sounds.
D.To uncover the mysterious underwater world.
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

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2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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