四年级 简单机械
Quiz
•
Science
•
2nd Grade
•
Practice Problem
•
Hard
Xine Ng
Used 3+ times
FREE Resource
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械能控制机械转动的快慢和方向。
这是哪一种简单机械?
滑轮
轮轴
杠杆
齿轮
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械用来抬起重物,支点越靠近阻力点就越省力。
这是哪一种简单机械?
滑轮
轮轴
杠杆
齿轮
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械能减少物体移动时所产生的摩擦力,也能使工作更省力。
这是哪一种简单机械?
滑轮
轮轴
杠杆
齿轮
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械能较容易地提起重物。
这是哪一种简单机械?
滑轮
轮轴
杠杆
齿轮
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械能用来切割、劈开或凿开物体。
这是哪一种简单机械?
斜面
螺旋
杠杆
尖劈
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械能将两个物体嵌合在一起。
这是哪一种简单机械?
斜面
螺旋
杠杆
尖劈
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
这种简单机械有支点,阻力点和动力点。
这是哪一种简单机械?
斜面
螺旋
杠杆
尖劈
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