外研版（2019）高中英语必修第二册 Unit1Food for thought 单元背景探索阅读课件(共10张PPT)
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| 名称 | 外研版（2019）高中英语必修第二册 Unit1Food for thought 单元背景探索阅读课件(共10张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 2.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-02-26 16:39:57 | ||
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文档简介
(共10张PPT)
素养阅读系列
单元背景探索阅读
读有所获
练有所得
词汇积累
长难句分析
学有所益
阅读提示：剥香蕉的时候，你有没有为里面的韧丝烦恼过？直接扯掉还是吃了？有没有想过香蕉为什么要长这些韧丝呢？美国学者表示，这些韧丝是为了传输营养物质而存在，完全可以食用，而且也同样富含营养。
读有所获
Bananas are a wonderful source of potassium (钾) and are the perfect on-the-go snack.
The only downside of the fruit are those irritating leathery strands—which are actually called “phloem bundles(韧皮束）” —that you get when you peel a banana.
But while those stringy bits may not be the most palatable (美味的）, they are in fact very important and we wouldn’t be able to eat bananas without them, according to Nicholas D.Gillitt, a US academic who shed some light on the mystery this week in a report on The Huffington Post.
The clue as to why those strands are so important is in their name.
Phloem is one of the two types of transport tissue that you can find in all plants, and moves nutrients and other substances around the whole plant①.
In a banana, the phloem strands are the reason why all the nutrients can reach the whole of the fruit, which allows it to grow into the fruit we know of.
读有所获
Nicholas D.Gillitt，who is vice president of nutrition research and director at the Dole Nutrition Institute, explained to The Huffington Post，“Phloem bundles are necessary for the adequate disposition of nutrients throughout the plant.”
The phloem bundles are completely edible and are just as nutritionally rich as the main part of the fruit, according to Gillitt.
“In fact, the strands probably contain a lot more fibre than the rest of the fruit，”he said.
It is possible to genetically modify the fruit to prevent strands from forming, but Gillitt says there is little point in dedicating funds to researching this when companies can better invest in coining up with disease-resistant food or fruit with higher nutritional content②.
读有所获
答案:l. In a banana, the phloem strands make all the nutrients reach the whole of the fruit，which allows it to grow into the fruit we know of.
答
案
解
析
1
练有所得
What’s the use of phloem strands in a banana
__________________________________________________
Why does Gillitt think there is little point in dedicating funds to genetically modifying the banana to prevent strands from forming
___________________________________________________
答案: 2.Because he thinks companies can better invest in coming up with disease-resistant food or fruit with higher nutritional content.
答
案
解
析
2
练有所得
1.on-the-go snack 便携式零食
2.downside n.缺点，不利方面
3.leathery 坚韧粗糙的
4.peel v.剥皮
5.academic n.高等院校教师;高校科研人员
6.shed light on 阐明；使......清楚地显出
7.nutrient 营养物
词汇积累
8.adequate adj.足够的
9.disposition 布置；安排；排列
10.edible adj.可食用的
11.modify v.修改
12.dedicate vt.投入；奉献
13.disease-resistant adj.抗病的
词汇积累
学有所益
长难句分析
①句意:韧皮部是你在所有植物中都能找到的两种运输组织中的其中一种，它将营养物质和其他物质运输到整株植物。 分析:这是一个主从复合句。that you can find in all plants是定语从句;and连接两个并列的谓语， 分别是is和moves。
②句意:基因改造水果，以防止形成韧丝是可能的，但Gillitt说，当公司能够更好地投资开发抗病食品或营养含量更高的水果时，投入资金来研究这一点没什么意义。 分析:这是一个并列复合句。but连接两个并列分句，在第一个分句中It为形式主语，真正的主语是后面的不定式短语;在第二个分句中says后面 跟了一个宾语从句，从句使用了 there be句型，宾语从句中还含有when引导的时间状语从句。
素养阅读系列
单元背景探索阅读
读有所获
练有所得
词汇积累
长难句分析
学有所益
阅读提示：剥香蕉的时候，你有没有为里面的韧丝烦恼过？直接扯掉还是吃了？有没有想过香蕉为什么要长这些韧丝呢？美国学者表示，这些韧丝是为了传输营养物质而存在，完全可以食用，而且也同样富含营养。
读有所获
Bananas are a wonderful source of potassium (钾) and are the perfect on-the-go snack.
The only downside of the fruit are those irritating leathery strands—which are actually called “phloem bundles(韧皮束）” —that you get when you peel a banana.
But while those stringy bits may not be the most palatable (美味的）, they are in fact very important and we wouldn’t be able to eat bananas without them, according to Nicholas D.Gillitt, a US academic who shed some light on the mystery this week in a report on The Huffington Post.
The clue as to why those strands are so important is in their name.
Phloem is one of the two types of transport tissue that you can find in all plants, and moves nutrients and other substances around the whole plant①.
In a banana, the phloem strands are the reason why all the nutrients can reach the whole of the fruit, which allows it to grow into the fruit we know of.
读有所获
Nicholas D.Gillitt，who is vice president of nutrition research and director at the Dole Nutrition Institute, explained to The Huffington Post，“Phloem bundles are necessary for the adequate disposition of nutrients throughout the plant.”
The phloem bundles are completely edible and are just as nutritionally rich as the main part of the fruit, according to Gillitt.
“In fact, the strands probably contain a lot more fibre than the rest of the fruit，”he said.
It is possible to genetically modify the fruit to prevent strands from forming, but Gillitt says there is little point in dedicating funds to researching this when companies can better invest in coining up with disease-resistant food or fruit with higher nutritional content②.
读有所获
答案:l. In a banana, the phloem strands make all the nutrients reach the whole of the fruit，which allows it to grow into the fruit we know of.
答
案
解
析
1
练有所得
What’s the use of phloem strands in a banana
__________________________________________________
Why does Gillitt think there is little point in dedicating funds to genetically modifying the banana to prevent strands from forming
___________________________________________________
答案: 2.Because he thinks companies can better invest in coming up with disease-resistant food or fruit with higher nutritional content.
答
案
解
析
2
练有所得
1.on-the-go snack 便携式零食
2.downside n.缺点，不利方面
3.leathery 坚韧粗糙的
4.peel v.剥皮
5.academic n.高等院校教师;高校科研人员
6.shed light on 阐明；使......清楚地显出
7.nutrient 营养物
词汇积累
8.adequate adj.足够的
9.disposition 布置；安排；排列
10.edible adj.可食用的
11.modify v.修改
12.dedicate vt.投入；奉献
13.disease-resistant adj.抗病的
词汇积累
学有所益
长难句分析
①句意:韧皮部是你在所有植物中都能找到的两种运输组织中的其中一种，它将营养物质和其他物质运输到整株植物。 分析:这是一个主从复合句。that you can find in all plants是定语从句;and连接两个并列的谓语， 分别是is和moves。
②句意:基因改造水果，以防止形成韧丝是可能的，但Gillitt说，当公司能够更好地投资开发抗病食品或营养含量更高的水果时，投入资金来研究这一点没什么意义。 分析:这是一个并列复合句。but连接两个并列分句，在第一个分句中It为形式主语，真正的主语是后面的不定式短语;在第二个分句中says后面 跟了一个宾语从句，从句使用了 there be句型，宾语从句中还含有when引导的时间状语从句。