4年级科学《声音的反射》02082021
Quiz
•
Science
•
4th Grade
•
Hard
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21 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
当声音遇到物体时,会不会反射?
会
不会
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
当传播出去的声音碰到障碍时反射回来的声音叫作( )。
反声
回音
回声
留音
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
哪个地方的回音最久最长?
山谷
电影院
课室
箱子里
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
怎样的物体表面能吸收声音?
柔软
平滑
坚硬
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
怎样的物体表面反射声音的能力比较好?
柔软
平滑
粗糙
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
哪种技术可以用来测量海底深度和探测物体在海底深处的位置?
超声波
回音
声呐
回声
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
哪种动物在黑暗中应用声呐来捕抓猎物?
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