Unit 4 Astronomy：the science of the stars [单词 拼写应用]核心单词1．atmosphere n．大气层；气氛2．solar adj.太阳的；日光的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．However，he was the gentlest (gentle) man I have ever known.4．When her dinner partner showed up，she also pulled (pull) up a chair.5．(2017·全国卷Ⅲ)We are looking at the benefits of systems (system) which control their speed as a way of preventing that.拓展单词1．globe n．球体；地球仪；地球→global adj.全球性的；全世界的2．violent adj.猛烈的；激烈的；强暴的→violence n．暴力→violently adv.暴力地；猛烈地3．like vt.喜欢 prep.像→dislike vt.不喜欢；讨厌→likely adj.可能的→unlike prep.与……不同；不像4．harm n．& vt.伤害→harmful adj.有害的→harmless adj.无害的5．exist vi.存在；生存→existence n．存在；生存6．puzzle vt.& vi.(使)迷惑；(使)为难 n．谜；难题→puzzled adj.感到困惑的→puzzling adj.令人困惑的7．religion n．宗教；宗教信仰→religious adj.宗教上的；信奉宗教的；虔诚的8．biology n．生物学→biologist n．生物学家9．react v．反应→reaction n．反应；回应[语境运用] 用所给词的适当形式填空。1．There was a puzzled look on the little girl's face because a puzzling problem puzzled her.(puzzle) 2．Last night we had a discussion，which became more and more violent．Finally we reached an agreement that we will never use violence whatever happens.(violent) 3．Playing computer games will not only do harm to your physical health，but it is also harmful to your mental health.So there...
