四年级科学练习58(杠杆)

Quiz
•
Science
•
4th Grade
•
Hard
LIEW Moe
Used 257+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
简单机械可分为几种?
5
6
7
8
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
剪刀属于哪一类杠杆?
一
二
三
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪个是第二类杠杆?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下图那个是第三类杠杆?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
核桃夹应用杠杆原理操作。
P、Q和R代表什么位置?
P:支点,Q:重点,R:力点
P:重点,Q:支点,R:力点
P:力点,Q:重点,R:支点
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪一种工具属于第二类杠杆?
7.
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
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