The ocean isn't a quiet place as you imagine.Most of the noise is caused by sea animals themselves.Most of them use sound to find what they eat，whom they play with，or which general position they move towards.But the noise from human activities is increasingly troubling the lives of ocean animals.According to scientists，loud noise may cause more whales and other sea animals to take the ground（擱淺）.Researchers recorded only five of these events in the first half of the 20th century.But from 1950 to 2004，they recorded more than 1，200 times.These were perhaps because of the use of sonar（聲吶） under water since 1950.
Another main reason of loud underwater noise is pile driving（打樁）.Piles are driven deep into the floor of the ocean.Driving in a single pile can take several hours and as many as 5，000 hits.This process creates a lot of noise.
To control that noise，some companies are making use of tiny bubbles（氣泡）.A single bubble is easily broken.However，the bubble wall can make pile driving quieter.The bubble wall is usually created in this way：A tube is placed in a ring around a pile.Air is then let out through closely spaced openings on the tube.When the bubbles rise，they act as a wall and take in some of the noise.Some more of the sound reflects（反射） back and becomes stuck inside the wall.Such bubble walls are really helpful.Scientists found that these walls can reduce noise by 30 decibels（分貝）.A German company even says that its Big Bubble Wall can cut down the noise of pile driving by up to 95 percent.What exciting news it is!Such small changes in human activities can help make life better for animals in the oceans.
Tiny Bubbles Offer Big HelpThe source of sea noise From sea animals：It's （1）necessarynecessaryin the ocean.
From human activities：The events of sea animals taking the ground are（2）increasingincreasingbecause of the use of sonar.
The control of sea noise
Loud noise may（3）causecauseproblems for sea animals.
（4）MethodsMethods：Use a tube to act as a bubble wall.The noise of pile driving could be（5）taken intaken inor reflected back in this way.
Purpose：To make life better for sea animals around the world.
【答案】necessary；increasing；cause；Methods；taken in
【解答】
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發(fā)布：2024/10/25 6:0:3組卷：2引用：1難度：0.5
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Here are five ways for teens to improve their ability to balance their emotions（情緒）.A.It also helps create a sense of achievement.
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2．The 2022 Hangzhou Asian Games has been put off and will be held from September 23 to October 8，2023.It will be a good chance for Chinese to watch some games during the National Day holiday.If you'd like to watch games in Hangzhou，here are some rules for you.
閱讀以上材料，根據(jù)其內(nèi)容回答其后各個小題。
ArcherySit at the back or on either side of the field.
Keep quiet during the match.Turn off your cellphone or keep it silent.
Do not use the flash on your camera or your phone.
When the athletes are trying to shoot the target（射擊靶子），keep your voice down.
BasketballYou cannot bring drinks in glass bottles.
Keep the cheers down at important moments.Do not use the camera flash.
If you easily get nervous，bring some snacks.Keep your mouth moving to calm you down.
▲Audience（觀眾）should keep off the track（跑道）.Control your pets.
Athletes might look tired and thirsty，but do not hand them water or anything else.
If an athlete falls，do not touch or help him.
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A．On September 8，2023.
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C．On October 8，2023.
D．On October 23，2023.
（2）What does the underlined word"flash"mean in Chinese？
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B．外殼
C．屏幕
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A．Football.
B．Running.
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A．You can use the camera flash during the basketball game.
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D．You can't eat anything when you're watching the basketball game.
（5）What is the passage mainly about？
A．Some most popular games.
B．Introduction to some games.
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D．Rules for watching some games.發(fā)布：2024/12/27 18:30:2組卷：11引用：4難度：0.5 -
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