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3年级科学-机械

Authored by LEE Moe

Science

1st - 10th Grade

Used 1+ times

3年级科学-机械
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

它是什么滑轮?

定滑轮

动滑轮

滑轮组

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

它是什么滑轮?

定滑轮

动滑轮

滑轮组

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

利用这种滑轮时,我们的力量是......

向前推

向上推

向下拉

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

利用这种滑轮时,我们的力量是......

向下拉

向上拉

向前推

向后退

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

滑轮的轮子周缘有_________, 能套上 绳子或链条才能操作。

重物

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

以下哪项不是滑轮的用处?

提起重物并运到高处

节省力气

工作变得较为容易

浪费时间

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

定滑轮动滑轮组合起来使用,就构成了滑轮组。

正确

错误

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