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0雙鞋的合同。 約,合同 When you heat a metal,it contracts. 當(dāng)你給金屬加熱時 ,它會收縮。 考查倒裝句式 我們靠天吃飯的日子一去不復(fù)返了。 考查 The more...,the more...句式 你越是努力,取得的進步就越大。 考查句式 It is+adj.+(for/of sb.)+ to do sth. 把傘忘在出租車上,你真粗心。 考查倍數(shù)表達法 新修的路比原來的路寬 3倍。 考查分?jǐn)?shù)的表達法和主謂一致 這里三分之一的書是屬于他的。Reading and vocabulary Read the passage as quickly as you can and choose the best title for it. The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen Passage A We can reach a conclusion that it is important for us to read books. It is our aim to build up a harmonious society. It is a piece of electrical equipment. The stone contains potassium sodium calcium magnesium The wheel is made of aluminum. zinc oxide Nails are easy to rust in the damp air. Water boils at 100 176。 C. conclusion aim electrical potassium sodium calcium magnesium aluminum zinc copper oxide rust boils Read the passage again and answer the following questions: 1. Which of the metals in the table reacts the most with oxygen and water? Potassium, calcium and sodium. 2. What happens when you heat calcium in oxygen? It burns to form an oxide. 3. Which metals react with steam? Magnesium, aluminium and zinc. 4. Does iron have a slow or fast reaction with steam? It has a slow reaction. 5. Does copper react with water? No,