四年级科学练习62(简单机械)
Quiz
•
Science
•
1st Grade
•
Practice Problem
•
Medium
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10 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
以下哪项属于简单机械?
杠杆
电脑
齿轮
尖劈
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
自行车应用了几个简单机械操作。
以下哪一个不是自行车应用的简单机械?
杠杆
尖劈
齿轮
轮轴
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
W工具运用了以下的简单机械原理来操作:
轮轴
杠杆
斜面
哪一个最有可能是W工具?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
手表应用了以下简单机械,除了__________
齿轮
螺旋
斜面
轮轴
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下的工具都是以尖劈的原理操作,除了
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
水龙头是应用什么简单机械的原理操作?
螺旋
轮轴
齿轮
7.
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
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