题型:单词拼写(语篇) 题类:常考题 难易度:普通
2016年新目标英语中考知能综合检测七:八年级上册 Units 4-6
How airplanes fly?
People (try) for a long time before they invented a (success) "flying machine". Now there (be) so many (plane) in the sky.
An airplane (fly) because of the upward force(力量) of (move) air against its wings(翼). To get that moving air, it needs something (push) it forward—like a motor-driven propeller(螺旋桨) or a jet engine(喷气发动机). You can fly a kite if there (be) enough wind to hold it up. An airplane is like a kite with such force!
More and (many) young people are getting to like making model planes now. How about you? Are you interested in it after (read) this article?
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