风声是怎样产生的?
四年级科学-第六课 声音

Quiz
•
Science
•
4th Grade
•
Medium
LIEW Moe
Used 134+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
树枝振动
空气振动
喇叭振动
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
在停止对大钟敲击后,大钟仍然“余音未止”,这是什么原因?
回声
人的错觉
空气振动
敲击虽然停止,但是大钟仍在振动。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
人所发出的声音不是由振动发出。
正确
错误
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
下列哪项说明是错误的?
物体即使不振动,也能发出声音。
蚊子发出“嗡嗡”声是由于蚊子的翅膀振动发出的。
蜜蜂的发声部位是翅根旁的小黑点。
声音可以被反射。
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
在房间里谈话比在旷野里谈话听起来响亮,这是为什么?
房间内的空气不流通,不利于声音的传播。
旷野的空气比较稀薄。
在房间里原声和回声混在一起,使原声加强。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
回声是声音的反射现象,人们能听到回声需要一定的条件。
正确
错误
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
下列哪项说明是正确的?
超声波是一种高频率的声波。
噪音不会损害人的听觉。
所有的声音都是对我们有益的。
声音只能往单一方向传播。
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