冀教版九年级英语上册《DNA-The Story of You》Look into Science! PPT精品课件，共27页。
Lead-in
Look at the picture.
What you find?
The boy looks like his father.
The girl looks like her mother.
Read the first part of the passage and answer.
1. What is a blueprint?
It’s a drawing that shows how to put a house together with many different parts.
2. What is the blueprint of life?
DNA.
3. Which is more complex, building a living thing or building a house? Why?
Building a living thing is far more complex. Because it takes millions of years for nature to change the DNA in living things to make them fit the world they live in.
4. Before we are born, what can be influenced by our DNA?
Our height, the colour of our eyes, the size of our feet.
Language points
1.But building a living thing is far more complex than building a house. 但创造一个生物比盖房子要复杂得多。
far用于比较级表示程度，
这样的词语还有much、still、even、no、a little、a bit、a lot、rather、any等。
The room is a bit larger than that one.
这个房间比那个稍大一点。
He works still harder than ever. 他比以往更加努力学习了。
Matters are a lot better than ever before. 情况远远比以前好。
Can he jump any higher? 他能跳得更高一些吗？
Lesson One is much easier than Lesson Two.
第一课比第二课容易得多。
Tom looks even younger than before.
汤姆看上去甚至比以前还年轻。
2. Except for some twins, every living things has its own unique DNA.
除了同卵双胞胎之外，每个生物都有自己独特的DNA。
辨析：except、except for、besides与but
We all went to the zoo except Li Ming. 除了李明，我们都去了动物园。
The shirt looks good except for its colour. 这件衬衫除了颜色，还不错。
I have two books besides this one. 除了这本，我还有两本。（共三本）
There is nothing but a desk here. 这里除了一张桌子外什么也没有。
3. From your DNA, scientists can identify not only you, but also people who are related to you.
从你的DNA中，科学家们不但能够辨认出你，而且能够辨认出和你有血缘关系的人。
(be) relate to/with表示“与……有关” 。
He is related to my family.他与我的家庭有关系。
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关键词：DNA-The Story of You PPT课件免费下载，.PPTX格式；
