Sounds can be loud or soft. They can be pleasant or unpleasant.Animals use sound in many ways. Humans use sound to communicatetheir thoughts and feelings. Other animals use sound to communicate,too. Humans have invented many things to make sounds. For example,Africans use drums to show their...
【题目】People, animals and objects make sounds . Even the weather makes sound . Sounds can be loud or soft. T hey can be pleasant or unpleasant. Animals use sound in many ways. Humans use sound to communicate their thoughts and feelings . Other animals use sound to communicate, too. ...
①Scientists have found that plants can make sounds. ②A scientist Lily Hadany and her team recorded(录制) tomato plants at different times. It showed that the plants made ultrasonic(超声波)sounds. Humans could only hear them with the help of a computer. They were noises like clicking(咔哒...
根据第一段“Humans’ voice sounds more pleasant than that of primates (灵长类动物) because we don’t have vocal membranes (声带膜), a new study suggests.(一项新的研究表明,人类的声音听起来比灵长类动物更令人愉悦,因为我们没有声膜)”可知,人类的声音听起来不那么难听的原因是人类没有声膜。故选...
B. There are many sounds humans can 't hear. C. In general, sounds are neither good nor bad. D. In many cases, it depends on what we are doing at the time. E. However, there are some sounds that almost everyone likes. F. For example, listening to natural sounds makes us feel ...
C. Humans cannot pick up the sounds they make for communication. D. They can pick up infra-sound which is sent by the special machines.( D )34. Why is the example of bats mentioned? A. To tell readers that bats are clever animals. B. To list the kinds of arguments animals usually...
As animals grow, the sounds they make change. But some sounds continue to change, even after an animal matures. That's true for humans, and now it turns out to be true for North Atlantic right whales, too. Syracuse University biologist Holly Root-Gutteridge analyzed recordings of whale ...
Sometimes we humans make sounds 8 . We make sounds like“Oh!”or“Ouch!”to show how we feel about something or when we 9 something on our feet. We humans have languages. We have words. These words have the meaning of things,actions(行动), feelings or ideas. We 10 give each other...
B Scientists found that plants can make sounds. A scientist Lily Hadany and her team recorded(录制) tomato plants at different times. It showed that the plants made ultrasound(超声波). Humans could only hear them with the help of a computer.As the scientists studied the sounds, they began...
They found out that these plants made sounds that humans usually can't hear. When the scientists changed the recordings so we could hear them, they heard creaking sounds.The scientists noticed that the plants made more sounds when they were thirsty. When the soil (土壤) was dry, the plants...