Airplanes · 飛機單元測驗卷

一、單字配對（20 分）

把右邊的代號填進左邊的括號裡。

二、選擇題（30 分）

1. (    )1.What actually holds a plane up?

   1. (A) The engines
   2. (B) Lift from the wings
   3. (C) The tail
   4. (D) The landing gear

2. (    )2.Why is air pressure lower above the wing?

   1. (A) The air is colder there
   2. (B) The air travels further and moves faster
   3. (C) There is less air up there
   4. (D) The wing is heated

3. (    )3.What do the engines do?

   1. (A) Lift the plane
   2. (B) Push it forward
   3. (C) Slow it down
   4. (D) Keep it warm

4. (    )4.What is the force of air pushing back against the plane called?

   1. (A) Lift
   2. (B) Weight
   3. (C) Thrust
   4. (D) Drag

5. (    )5.Why do planes fly so high?

   1. (A) To avoid birds
   2. (B) Thin air means less drag and less fuel
   3. (C) To see further
   4. (D) To stay cool

6. (    )6.How long was the Wright brothers' first flight?

   1. (A) 12 seconds
   2. (B) 12 minutes
   3. (C) 1 hour
   4. (D) 1 day

三、填空（每題填一個單字）（30 分）

1. 1.The upward force from the wings is called ____.（提示：升力）
2. 2.The engines provide ____ to push the plane forward.（提示：推力）
3. 3.Air pushing back against the plane is ____.（提示：阻力）
4. 4.The top of a wing is ____ and the bottom is flatter.（提示：彎曲的）
5. 5.Cruising ____ is about eleven thousand metres.（提示：高度）
6. 6.____ is the force pulling the whole plane down.（提示：重力）

四、簡答（用英文回答，一到兩句即可）（20 分）

1. 1.Explain in your own words how a wing creates lift.用你自己的話說明機翼怎麼產生升力。

2. 2.Why do planes take off into the wind?飛機為什麼要逆風起飛？