第11课:机械
Quiz
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Science
•
1st Grade
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Practice Problem
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Medium
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30 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下图显示一种物品。
以上物品应用了哪项简单机械的原理来操作。
杠杆
滑轮
齿轮
轮轴
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下图显示一种简单机械。
以上简单机械有什么功能?
比较容易搬动物体
把两个物体衔接起来
把物体分割成两个部分
改变物体运动的方向和速度
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
以下哪项活动涉及机械的应用?
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
以下哪种用具应用了滑轮?
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下图显示一种应用杠杆原理的工具。
P、Q 和 R分别代表杠杆中的那些位置?
P:重点 Q:支点 R:力点
P:力点 Q:重点 R:支点
P:支点 Q:力点 R:重点
P:支点 Q:重点 R:力点
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
以下哪项有关简单机械的说明是正确的?
A. 螺纹越密,就越省力。
B. 尖劈越短,越厚,就越省力。
C. 斜面的斜度越小,就越费力。
D. 动滑轮的数量越多,就越费力。
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下图显示简单机械的分类。
X 、Y 和 Z 分别代表什么?
A) X: 斜面 Y:螺旋 Z:尖劈
B) X: 尖劈 Y:轮轴 Z:杠杆
C) X: 尖劈 Y:杠杆 Z:齿轮
D) X: 齿轮 Y:尖劈 Z:斜面
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