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三年级科学滑轮

Authored by LEE Moe

Science

3rd Grade

Used 59+ times

三年级科学滑轮
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10 questions

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1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

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图中是什么简单机械?

轮轴

齿轮

轮子

滑轮

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

下面哪项是图中简单机械的用处?

提起重物

切开物体

推动重物

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

图中是哪一类滑轮?

动滑轮

定滑轮

滑轮组

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

下面哪一个是动滑轮?

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Media Image
Media Image

5.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

下面哪一种机械种类能帮助我们省力?

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Media Image
Media Image

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

利用上图简单机械提升重物时, 需要向什么方向用力?

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7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

根据上图完成句子。

动滑轮________改变力的方向,但 ___________ 省力。

不能, 不能

能, 能

能, 不能

不能, 能

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