四年级科学杠杆
Quiz
•
Science
•
4th Grade
•
Practice Problem
•
Medium
Tan moi eng eng
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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是杠杆?
是两块板组成的木板
是一根水管
是一根绕着固定点转动的硬棒
是一根火柴
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
杠杆有三个重要的位置,除了
重物点
支点
动力点
阻力点
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是动力点?
支撑着杠杆
承受重物的位置
有精神做事
施力的位置
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是阻力点?
支撑着支点
承受重物的位置
施力的位置
阻碍我们做事
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
支点越靠近阻力点,所施的力越_________。
小
大
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
支点离阻力点越远,所施的力越_________。
小
大
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
杠杆是一种_______________。
简单机械
复杂机械
好看机械
耐用机械
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