长短相同的物体,下面选项中正确的是( )。

科学知识测试闯关

Quiz
•
Science
•
4th Grade
•
Medium

LEI SUN
Used 4+ times
FREE Resource
57 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
粗的物体发出的声音高
细的物体发出的声音高
一样高
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
鼓膜的特点是( )。
薄而无弹性
薄而有弹性
厚而无弹性
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
古代,战士们在旷野地区常用"伏地听声(趴在地面听声音)"的办法来判断有无敌方军队的到来。下列说法正确的是( )。
马蹄声只能沿着地面传播
大地传声速度比空气传声速度快
通过地面听到的声音比空气传播过来的要轻
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
航天员在太空与地球上的我们通话,是靠( )帮助传播声音的。
地面
空气
无线电波
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列声音中,( )属于人为制造的声音。
海浪声
歌声
风声
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
小东说话的声音是由喉咙里的( )发出的。
舌头
喉结
声带
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列行为不属于消除噪声污染措施的是( )。
植树种草
工厂建造使用隔音材料
汽车随意鸣笛
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