
4年级科学_单元10《机械1》
Authored by K ST
Science
4th - 5th Grade
Used 67+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下的工具都是以尖劈的原理操作,除了
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
“切割、劈开或凿(záo)开物体。”
以下哪样简单机械符合上述用途?
齿轮
尖劈
螺旋
斜面
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项有关上图齿轮的说明是正确的?
小齿轮转得比较慢
大齿轮转得比较快
它们转动的方向一致
它们以相反的方向转动
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项有关滑轮的说明是正确的?
定滑轮是可以移动的
滑轮组由数个定滑轮组成
动滑轮需要更大的力来操作
定滑轮不能省力
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项工具和上图使用同样的原理操作?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项简单机械能把两个物体连接起来?
轮轴
螺旋
滑轮
齿轮
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
以上的简单机械的名称是?
螺旋
杠杆
尖劈
滑轮
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