5、.teachertogetherwithstudentssummarizethewords6.dotheexercisebythemselves7.checktheanswer单词备注1.system n.[c] 系统;制度;方法 systematic adj 有系统的;1.makesummaryaboutthewordsbythemselves2.finishtheexercise3.trytorememberthosenewwords有条理的 [典例] 1).The solar system includes the sun andits eight planets.太阳系包括太阳
6、和它的八颗行星。 2).Alcohol is bad for your system. 喝酒对身体有害。 [练习] 根据句子的意思完成句子。 1). The ______ ______ (教育系统)operates very differently in the US and China. 2). He introduced us a well-designed ______ ______ (铁路系统). Keys: 1). educational system 2). railway system 2. existv.存在;生存 existence n. 存在 [典例] 1). Do
7、es life exist on Mars? 火星上有生命吗? 2). I can hardly exist on the wage I’ m getting. 我靠我挣的工资简直难以餬口。 [重点用法]exist on sth. 靠某物生存 existin存在于某地existas作为……而存在 [练习]用exist的短语或其适当形式填空。1). This plant ______ only _____