Unit 13 The water planet⊕考纲要求：◆ 考纲规定的考试范围:重点单词与短语 sailor；benefit；disadvantage；entertainment；medium；relatively；solid；available；pure；dense；relationship；mass；volume；float；absorb；release；stable；sensitive；bottom句型Life in the oceans range from the tiniest plants all the way up to giants like sharks and whales. range 的用法。Water is actually quite simple, but the way the water molecule is formed gives water its unique properties. the way 后的定语从句用法They form a polar molecule, that is, one with a slightly positive end and a slightly negative end. that is 插入语的用法语法：复习情态动词◆ 复习本章要达到的目标1. 掌握 sailor；benefit；disadvantage； medium；relatively；solid；available；pure；dense；relationship；mass；volume；float；absorb；release；stable；sensitive；bottom 等重点单词及短语的用法。2. 掌握的用法。⊕教材知识归纳◆知识归纳1. Practise making suggestions and expressing opinions.practise(1)n.① 实行,实施,实践（U）I am afraid the idea would never work in practice.恐怕这想法实际上行不通。②(反复的)练习,学习（C/U）Learning a language needs a lot of practice.学习语言需要勤练不辍。③(医生、律师等的)业务,工作,营业[C]Dr. Pat is no longer in practice here.派特医生不在这儿行医了。④ 习惯,常规,惯例The old practice still prevails in the countryside.旧习俗在乡间仍然流行。(2)vt.① 实践,实行What I preach, I am resolved to practice.我所讲的道理,我必定身体力行。用心 爱心 专心② 练习,实习;训练The young girl practices the violin every day.这小女孩每天练习拉小提琴。③ 经常做We should practice economy even if we are rich.既使我们富裕了也仍应该励行节约。④ 开业从事He has practiced law in Taipei for 30 years.他在台北做律师已有三十年。相关归纳：(1)practice doing sth. 练习做某事To improve your English, you must practice speaking more.为了提高你的英语，你必须练习多说英语。(2)in pract...
