简单机械:螺旋
Quiz
•
Science
•
4th Grade
•
Practice Problem
•
Hard
LEE Moe
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
螺旋应用了哪个简单机械的原理?
杠杆
齿轮
斜面
滑轮
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
缠绕在一个圆柱体的斜面就形成了............
杠杆
螺旋
齿轮
滑轮
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
螺旋在日常生活的用途很广,除了....
把重物架高起来
把两个物体嵌合在一起
瓶盖能锁紧在瓶口
改变速度
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
哪几项是应用螺旋的好处?(选出2项)
十分牢固
改变方向
容易拆卸
改变速度
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
螺纹越....................越 ...................,能承受……的力。
松.........省力……大
松……省力……小
密……省力……大
密……省力……小
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有越……螺纹的螺钉能使物体嵌合得更加……
少……牢固
密……牢固
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
在日常生活中,哪些物品应用了螺旋?(超过一项)
瓶盖
楼梯
水龙头
手摇钻
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