Unit 4 Astronomy the science of the stars三言两语1．China sent up its first satellite completely designed and built by middle school students in 2017．2．After a 21hour trip to space, the astronaut landed safely, making China the third country to send a person into space after Russia and the USA.3．No one knows exactly how the earth began.However, according to a widely accepted theory, it began with a “Big Bang”．1．一些科学家宣称他们找到了外星人在天空存在的证据。Some scientists claimed that they had found some evidence that aliens existed in space．2．中国成功把第一位宇航员送往天空的消息曾震惊了整个世界。The news that China had managed to send the first astronaut into space once shocked the whole world.[单词 拼写应用]核心单词1．atmosphere n．大气层； 气氛2. exhaust vt.用尽；耗尽；使精疲力尽3．thus adv.因此；于是4．gentle adj.温和的；文雅的5．climate n．气候6 ． crash vi.& vt. 碰撞；坠落7 ． pull n ． & vt. 拉(力)；拖；牵引力8．float vi.& vt.(使)浮动；(使)漂浮n．漂浮物9．system n．系统；体系；制度10．theory n．学说；理论[语境运用] 用所给词的适当形式填空1 ． A truck went out of control and crashed (crash) into the back of a bus.2 ． He found something floating (float) on the lake, which frightened him.3．After his journey from abroad，Richard Jones returned home，exhausted (exhaust)．4 ． The old scientist told his students that scientific theories (theory) must be based on facts.5．My uncle's car caught fire by the road.Fortunately, he was pulled (pull) out of the car by a passerby.拓展单词1 ． violent adj. 猛 烈的 ； 激 烈 的 ； 强 暴 的→ violence n ． 暴 力→ violently adv. 暴 力地；猛烈地2．like vt.喜欢 prep.像→unlike prep.与……不 同 ； 不 像 → dislike vt.不喜欢；讨厌3．harm n．& vt.伤害→harmful adj.有害的→ harmless adj.无害的4...
