科学 6 简单机械与复杂机械

上图显示一个小孩正在从滑板上滑下。

以下哪项利用如上图相同的原理来操作？

Diagram above shows a child is sliding down.

Which of the following diagrams is using the same principle with the above diagram?

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上图显示方向盘。

哪项物品涉及的简单机械原理与方向盘相同？

Diagram above shows a steering wheel.

Which of following tools use the same principle as the steering wheel in diagram above?

• 手锯

  Saw

• 手表

  Watch

• 切纸刀

  Paper cutter

• 水龙头

  Tap

上图显示灯泡和灯泡插座。

哪项是上图所涉及的简单机械原理？

Diagram above shows a light and a socket.

Which of the following simple machines principle involved in the above picture?

• 螺旋

  Screw

• 杠杆

  Lever

• 尖劈

  Wedge

• 轮轴

  Wheel and axle

哪项搭配是正确的？

Which of the following classifications is correct?

• 闹钟 - 杠杆

  Alarm Clock - Lever

• 擀面棍 - 滑轮

  Rolling pin - Pulley

• 刀片 - 螺旋

  Cutter - Screw

• 梯子 - 斜面

  Ladder - Inclined plane

上图显示一个工人正在推独轮手推车上斜坡。
在这项活动里，没有涉及哪个简单机械原理？
Diagram above shows a worker is pushing a wheelbarrow.
Which of the following simple machines is not using in this activity ？

• 杠杆
  Lever

• 滑轮
  Pulley

• 斜面
  Inclined Plane

• 轮轴
  Wheel and axle

如果没有使用简单机械，以下哪个活动就无法进行？

If simple machines is not used, which of the following activities cannot be performed?

• 看书

  reading book

• 爬树

  Climbing tree

• 从墙上拔出铁钉

  Pulling the nail from the wall

• 唱歌

  Singing

以下是简单机械和复杂机械的分类，哪个是不正确的？

Below are the classifications of simple machines and complex machines, which of the following classifications is incorrect?

• 简单机械 simple machine 复杂机械 Complex machine

  剪刀 Scissors 自行车 bicycle

• 简单机械 simple machine 复杂机械 Complex machine

  螺丝起子 Screw driver 手摇钻 Hand drill

• 简单机械 simple machine 复杂机械 Complex machine

  G 型钳 G-clamp 起重机 Crane

• 单机械 simple machine 复杂机械 Complex machine

  切纸刀 Paper cutter 斧头 axe

 $\rightarrow$  尖劈  Wedge
 $\rightarrow$  斜面  Inclined Plane
上面说明显示简单机械的原理在 Q工具。
下列哪项是Q工具？
The list above shows the principles of simple machines found in tool Q.
Which of the following is tool Q?

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上图显示两个不同齿数的齿轮嵌合在一起。

哪项有关上述齿轮的说明是正确的？

Diagram above shows two gears with different numbers of teeth fit together.

Which of the following statements about the gear is correct?

• 两个齿轮转动的方向是相同的

  Both of the gears rotate in the same directions

• 小齿轮转动的圈数比大齿轮多

  The rotation of the small gear is more than the big gear

• 小齿轮转动3圈时，大齿轮也会转动3圈

  The small gear rotates 3 times, big gear rotates 3 times too

• 当小齿轮牵动大齿轮时，大齿轮转动的较快

  When the small gear is driving the big gear, the big gear rotates much faster

上图显示一辆收割机。

下列哪项是应用收割机的效果？

Diagram above shows a harvesting machine.

Which of the following is the effect of using this machine?

• 收割时间会减少

  The time taken for harvesting decreases

• 应用肥料的数量会减少

  The use of fertilizers decreases

• 稻田的面积会减少

  The area of the paddy field decreases

• 工人的数量会减少

  The number of the worker decreases