机械
Authored by yong oi
Fun
1st - 12th Grade
Used 50+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图中显示一个转笔刀。部分R应用哪些简单机械的原理来操作?
螺旋和尖劈
斜面和齿轮
轮轴和尖劈
滑轮和螺旋
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项有关简单机械的说明是正确的?
螺纹越密,就越省力
尖穿越短、越厚,就越省力
斜面的斜度越小,就越费力
杠杆的支点越靠近重点，越费力。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
筷子应用了哪种简单的机械原理？
滾子
斜面
滑轮
杠杆
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
支撑杠杆的转动中心是__。
重点
支点
力点
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项不是简单机械
杠杆
斜面
螺旋
磁力
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图中显示一种应用杠杆原理的工具。
P、Q和R分别代表杠杆中的哪些位置?
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
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项有关简单机械的说明是正确的?
提高人类生活品味的工具
不需要靠人力操作的工具
克服人类能力极限的工具
让工作变得轻松及有效率的工具
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