上图是哪种声音的反射？
4年级 声音
Quiz
•
Science
•
4th Grade
•
Easy
Fen Xiao
Used 21+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
回音
声呐
超声波
雷达
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上图是哪种声音的反射？
回音
声呐
超声波
雷达
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上图是哪种声音的反射？
回音
声呐
超声波
雷达
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
当我们说话时，周围空气会怎么样？
振动
消失
氧气变多
二氧化碳变多
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
会发出声音的物体称作为_______________。
基本需求
水源
声源
电源
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
声音碰到障碍物时会________________。
消失
反射
蒸发
移动
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
我们可以通过以下哪3种方法来发出声音？
敲
睡
吹
弹
坐
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