
四年级科学机械
Authored by LAM Moe
Science
4th Grade
Used 272+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是复杂机械?
结构简单外形复杂的机械
可使工作省时但费力的机械
由两种以上的简单机械组成
可轻易进行工作的工具
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
图中的活动运用了哪些简单机械原理?
轮轴和螺旋
尖劈和杠杆
杠杆和齿轮
尖劈和轮轴
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项工具应用了斜面的原理?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小明无法开启紧闭的饼干桶,哪项原理能帮助他?
杠杆
尖劈
齿轮
螺旋
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项简单机械能把两个物体连接起来?
轮轴
螺旋
滑轮
齿轮
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项工具和上图使用同样的原理操作?
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