四年级科学 声音
Quiz
•
Science
•
4th Grade
•
Practice Problem
•
Medium
LIM Moe
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
当你对着瓶口吹起,周围的空气因 _____________ 而产生声音。
口水
震动
声带
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
为什么空荡荡的房间会听到回声?
声音通过空气传播
声音被折射
声音往四面八方传播
声音碰到障碍物反射回来
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
怎样的表面会反射声音?(选择两个答案)
柔软
平滑
粗糙
坚硬
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
声呐可以用来测量___________和探测物体在海底深处的位置。
海底深度
胎儿的发育情况
吉他的声音
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
回声和声纳的共同点是什么?
遇到物体表面时,声音会反射
可以透视人体
可以探测物体在海底深处的位置
都是应用声音反射的一种技术
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
蝙蝠利用声音的那种现象来捕捉猎物?
回声
超声波
雷达
声呐
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
孕妇可以运用什么仪器知道胎儿的情况?
听诊器
超声仪
声呐
回声
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