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[单选题]

Can fish hear fishermen（)along the stream？

A.moved

B.to move

C.moving

D.be moved

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发布时间：2022-05-13

更多“Can fish hear fishermen()along the stream?”相关的问题

第1题

听力原文：W: Hey Dan. I hear you're meeting Susan's parents for the first time.M: Yeah, nex

听力原文：W: Hey Dan. I hear you're meeting Susan's parents for the first time.

M: Yeah, next weekend. Fortunately, her father loves to fish, so we will have something to talk about.

Q: What can be inferred 'about Dan？

(13)

A．He is going to give a talk on fishing.

B．He thinks fishing is a good way to kill time.

C．He has the same hobby as Susan's father.

D．He is eager to meet Susan's parents.

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第2题

听力原文：Objects that are vibrating make sounds．Rhythmic sound vibrations produce sound wa

听力原文： Objects that are vibrating make sounds．Rhythmic sound vibrations produce sound waves which travel in every direction．The frequency of a sound is the number of waves that pass a given point each second．The more rapidly an object vibrates，the greater the frequency of sound it makes．Frequency is measured in hertz．One hertz equals one sound wave per second．The frequency of sound determines the degree of highness or lowness of the sound．A high-pitched sound has a higher frequency than a low-pitched sound．Humans hear sounds that have frequencies from about 20 hertz to 20,000 hertz。Sound with a frequency higher than 20,000 hertz is called ultrasound which is too high-pitched for humans to hear．However，many animals can hear ultra- sound．Bats can hear higher sounds than any other animal．Some can hear up to 210,000 hertz．Bats send out lots of high-pitched squeaks and then listen to the echoes bouncing off things like insects．The shorter the time interval between the squeak and the echo，the closer they are to the insect．Using sound to find or“see” things is called echolocation．Another animal that uses ultrasound is the dolphin．Dolphins can hear sounds up to about 150,000 hertz．Dolphins use sound waves to find food underwater．They make clicking sounds that hit whatever is around them and then bounce hack to the dolphins．Dolphins can send as many as 2,000 clicks per second．Dolphins' ultrasound ability is so sensitive that they can detect small fish from 10 feet away．

(30)

A．The quicker it vibrates, the greater the frequency of sound it produces.

B．The slower it vibrates, the higher the frequency of sound it produces.

C．The quicker it vibrates, the lower the frequency of sound it produces.

D．The frequency of sound it produces is not in proportion to the speed it vibrates.

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第3题

听力原文： Objects that are vibrating make sounds. Rhythmic sound vibrations produce sound

waves which travel in every direction. The frequency of a sound is the number of waves that pass a given point each second. [29] The more rapid, an object vibrates, the greater the frequency of sound it makes. Frequency is measured in hertz. One hertz equals one sound wave per second. The frequency of sound determines the degree of highness or lowness of the sound. A high-pitched sound has a higher frequency than a low-pitched sound. [30] Humans hear sounds that have frequencies from about 20 hertz to 20,000 hertz. Sound with a frequency higher than 20,000 hertz is called ultrasound which is too high-pitched for humans to hear. However, many animals can hear ultra sound. Bats can hear higher sounds than any other animal. Some can hear up to 210,000 hertz. Bats send out lots of high-pitched squeaks and then listen to the echoes bouncing off things like insects. The shorter the time interval between the squeak and the echo, the closer they are to the insect. [31]Using sound to find or "see" things is called echolocation. Another animal that uses ultrasound is the dolphin. Dolphins can hear sounds up to about 150,000 hertz. Dolphins use sound waves to find food underwater. [31] They make clicking sounds that hit whatever is around them and then bounce back to the dolphins. Dolphins can send as many as 2,000 clicks per second. Dolphins' ultrasound ability is so sensitive that they can detect small fish from l0 feet away.

(30)

A．The quicker it vibrates, the greater the frequency of sound it produces.

B．The slower it vibrates, the higher the frequency of sound it produces.

C．The quicker it vibrates, the lower the frequency of sound it produces.

D．The frequency of sound it produces is not in proportion to the speed it vibrates.

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第4题

You know that some birds and bugs can fly. But did you know that there’s another anima

l that can do this？ It has wings like a bird. But it doesn’t look like a bird. It’s a bat.Bats have fur mostly all over, but not on their wings. Some bats have black, brown, red, or yellow fur. These live in dark places, like caves. Other bats live in trees. Many of these bats are part white and part another color. Some of them are green.There are more than 900 kinds of bats. The biggest ones are called flying foxes. Their heads look like little brown fox heads. The wings of these bats can be over 5 feet across. But other kinds can be very little. The wings of the smallest bats are only 1/2 foot across.In the day, bats hang by their feet and sleep a lot. At times they clean their fur. Some of the time they care for their babies. Mostly they sleep. But when the sun goes down, they begin to move. At night bats fly around. They try to find food. Bats eat fruit, bugs, plants, fish, and flowers.Some bats use their good hearing to find things in the dark. First they make sounds. The sounds jump off anything around the bats. Then these sounds come back, so the bats can hear just where the thing is. They can fly right to it. That’s how they find things to eat.

1.According to the passage a bat is ().

A.an animal

B.a plant

C.a bird

D.food

2.From the passage we know that ().

A.there are as many as 900 kinds of bats in the world.

B.Bats with brown and red fur live in trees, while bats with green fur live in caves

C.bats are blind but have good hearing

D.the wings of the biggest bats can be exactly 5 feet across

3.The word “flying fox” in paragraph 3 means ().

A.red foxes flying high