
科学常识1
Quiz
•
Science
•
3rd Grade
•
Practice Problem
•
Medium
LING Moe
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下的工具都是以尖劈的原理操作,除了
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项有关上图齿轮的说明是正确的?
小齿轮转得比较慢
大齿轮转得比较快
它们转动的方向一致
它们以相反的方向转动
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
我们唱歌时,空气通过__________因振动而发声。
喉咙
颈项
声带
丹田
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
超声波是一种__________的声波。
低频率
高频率
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项是影响物体影子大小的因素?
P 物体的质量
Q 物体的摆放方式
R 物体与屏幕之间的距离
S 物体与光源之间的距离
P 和 R
P 和 S
Q 和 S
R 和 S
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上图显示原始人正在进行一项有关摩擦力的活动。哪项是木枝L所产生的摩擦力的效应?
美化物体
增加纹路
增加能量的消耗
产生热能,并帮助取火
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这项实验证明了什么?
木尺是电导体
木尺是电的绝缘体
木材制品都是电导体
木材制品都是热导体
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