河津市第二中学高一英语学案：《A lesson in a lab 》Reading1【问题设计】Reading and Vocabulary (P44)Step1 Reading1.Read the passage A and do Activity 1and 22.1.Read the passage A and B again and do Activity 3_6Step2 Language points :1.It is hard to think of a world without metals.it 是形式主语,真正的主语为 to think of a world without metals,这是英语中一个很重要的句型。It is +adj.+ to do 句型中 it 作形式主语，真正的主语为动词不定式。It is hard to think of a world without friendship.在文中找出另一个 it 作形式主语的句子_______________________2.When we use metals,it is important to know how they react with different substances.使用金属时,要了解金属和不同的物质如何发生反应,这一点很重要。 When 引导_________从句。It 作形式主语，how 引导的从句作 know 的宾语。react with... 对……起(化学)反应Potassium reacts with oxygen easily. 钾和氧容易起反应。react to...对……产生反应,回应The eye reacts to the light.眼睛对光会起反应。He didn’t react to their words.他对于他们的话没作反应。react against... 反对/反抗... Children tend to react against their parents by going against their wishes.3.The reaction of metals with these substances can be put in order.put...in order 把……按顺序排列keep order 维持秩序 in good order 井然有序 out of order 顺序乱的;出故障的4.Leave the tube for one week.leave v.使......处于某种状态.常用于“leave+宾语+宾补”如：Leave it where it is.5.add vt. 加;加起来;添加;补充说vi. 增添;添加(常与 to 连用) 【典型例句】If you add three to seven,you get ten.3 加 7 等于 10。The news added to his enjoyment. 这条消息增加了他的快乐。 Add up these numbers for me. 为我合计一下这些数字。 The cost adds up to 10 million yuan.成本总计达到一千万元。 add A to B 把 A 加到 B 上 add sth./that 补充说 add to 增加 add up 合计 adds...
