根据“How can we hear? Of course we hear sound with our ears! But do you know how our ears work?”们怎么能听到呢?当然我们用耳朵听声音!但你知道我们的耳朵是怎么工作的吗?可知,通过提出问题,来让读者产生兴趣。故选B。【小题2】推理判断题。通过第二段可知作者以正常听和掩住耳朵听进行对比,以此...
Of course we hear sound (声音) with our ears. But do you know how we use our ears? Ask your friend clap (拍手) his hands. Cover (遮盖) your ears. Can you hear your friend clapping his hands? Put down your hands. Ask your friend to play the piano. Can you hear the sound o...
2.2《我们怎样听见声音》说课稿(Lesson2.2howtohearthesound) Section2.2"howdowehearthesound"releases First,teachingmaterials 1.Analysisofteachingmaterials: Thissectionconsistsoffivesegmentstandardtextbooks, namelythegenerationofsound,soundtransmission,sound propagationconditions,voicecommunicationishowfastandhow dowehe...
Of course we hear sound(声音) with our ears.But do you know how we use our ears?Ask your friend clap(拍手) his hands.Cover(遮盖) your ears.Can you hear your friend clapping his hands?Put down your hands.Ask your friend to play the piano.Can you hear the soun...
Can you hear the sound of the piano? Cover your ears again. What can you find now?You know that sound makes air vibrate(震动), and then it makes sound waves(声波). Before you can hear the sound, the sound waves must get to your ears....
Of course we hear sounds with our ears! But Blnner ea:do you know how our ears work?Middle Ask your friend to clap()car his hands. Cover(遮盖) your ears. Can you hear your friend clapping hands? Ask your friend to play the piano. Can you hear the sound of the piano? Cover you...
We saw in the last section that sound travels through the air as vibrations in air pressure. To hear sound, your ear has to do three basic things: Direct the sound waves into the hearing part of the ear Sense the fluctuations in air pressure Translate these fluctuations into an electri...
If you've ever been to the Grand Canyon, I bet you shouted 'hello' into the canyon to see if you could hear your echo. If you did, you were rewarded with a series of 'hello' responses. An echo happens because the sound waves generated from your shout hit the hard walls of the ca...
the man who's back in town and loves to watch you smile don't know if I should laugh or cry with you sleeping by my side I hear the silence for miles and it's not over, I don't think that it will be and we are joined at the hip like Siamese twins and that's a metaphor ...
surrounding natural magnet. This causes the electromagnet to move back and forth. As the electromagnet moves, it pushes and pulls aspeaker cone, which rapidly pushes out air and then pulls back in. This movement of air particles produces the sounds wehear. (For more information, seeHow ...