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四年级科学练习58(杠杆)

Authored by LIEW Moe

Science

4th Grade

Used 261+ times

四年级科学练习58(杠杆)
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10 questions

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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

Media Image

剪刀属于哪一类杠杆?

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

以下哪个是第二类杠杆?

Media Image
Media Image
Media Image

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下图那个是第三类杠杆?

Media Image
Media Image
Media Image

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

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?

Media Image
Media Image
Media Image

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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