人教版八年级物理上册第二次月考试题与答案(国外英文资料).docVIP

人教版八年级物理上册第二次月考试题与答案(国外英文资料) Baochang 9-year school physics The school physics of the nine year school of baochang school physics Baochang 9-year school physics ( (( (eight years Eight years in eight years Eight years) )) ) the first The first the first second . The exam is the second month The next month test the question of the next month The following month test Class: the total score:... one One by one A, ,,, Multiple choice, Choice question Choose the problem For every little problem Each item 2 points hoping Points, ,, , a total of A total of a total of A total of 40 points hoping A: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 13, 14, 15, 16, 17, 18, 19, 20 In the following phenomena, it is not possible to explain how the sound produces (). An astronaut on the moon can only talk on the radio When you speak, touch your larynx with your fingers and feel the vibration C. The sound fork that is making a voice will open the suspended foam D. use your hand to hold the lingering sound of the gong, and the gong ceases immediately One night, xiao Ming was studying for his lessons at home. The neighbors were singing a song that interfered with his studies and was small The following measures that Ming intends to take are invalid () Turn the door off b. open the window and let the air flow C. use cotton to plug the ear d. go to the neighbors house and ask him to lower the sound of the song The three gorges dam, which has just been completed, has created human beings without structural cracks A miracle in the history of water conservancy, the ultrasonic wave that can be emitted by a flaw detector cant be heard by ear () A. the speed is too fast b. the noise is too low c. the frequency is too low The famous sentence in the tang poem maple bridge is included in the temple of the temple of the night and the half of the night. Acoustical knowledge, what is wrong with the interpretation of the acoustic phenomena is () The person on the passenger ship knows the sound of the bell by