初三（下） 8 波和信息 1
Authored by W.Y. Tan
Science
9th Grade
Used 20+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
波长
频率
波速
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
声波是___
横波
纵波
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
电磁波是___
横波
纵波
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
频率的单位是___
Hz
m
m/s
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
1秒内产生的波峰数是____
波长
频率
波速
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
20Hz以下的声波是___
次声波
超声波
人听到的声波
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
产检时，医生会使用___检验胎儿的发育状况。
超声波
X-ray
次声波
红外线
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