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三年级科学单元10机械

Authored by Sabrina Ting

Science

9th Grade

Used 10+ times

三年级科学单元10机械
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

什么是滑轮?

轮子周缘有齿,能与其他机械连接在一起

轮子周缘有槽,能套上绳子或链条

与绳子绑在一起的物体

带有倾斜平面的物体

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

以下哪个是动滑轮?

Media Image
Media Image
Media Image
Media Image

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

滑轮能帮助人们把重物从(X)提到(Y),使工作变得较容易。

X:左边,Y:右边

X:高处,Y:低处

X:左边,Y:右边

X:低处,Y:高处

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

图中显示妈妈从井里拿水。那种机械能减轻妈妈的工作?

轮子

齿轮

滑轮

斜面

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

图中的妈妈把窗帘卷起。窗帘上有什么装置能使妈妈的工作变得更容易?

轮子

滑轮

链条

绳子

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

以下哪项有关定滑轮的操作是正确的?

Media Image
Media Image
Media Image
Media Image

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

图中的活动应用了哪项滑轮?

轮轴

定滑轮

动滑轮

滑轮组

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