Period 3 Using Language， Assessing Your Progress & Video Time
Ⅰ.根据句意并结合首字母或汉语提示写单词
1.To my amazement， his opinion is similar to mine in many a .
2.We need to get to the r of the problem before we can solve it.
3.The plan received w support throughout the country.
4.He told a joke to （缓解） the tense atmosphere in the room.
5.She summed up the bills from the g with great care.
6.One of the advantages of （有机的） farming is its positive impact on our environment as a whole.
Ⅱ.一词多义
1.The food will digest more quickly if you chew it a little more. 词性： 词义：
2.He paused， waiting for her to digest the information. 词性： 词义：
3.The company publishes a monthly digest of its activities. 词性： 词义：
Ⅲ.单句语法填空
1.She devoted herself （entire） to her research， which earned her a pretty good reputation in her field.
2.It is important for us to have a （nutrition） breakfast， for it can keep us full of energy in the morning.
3.There is no fish of this kind at a （deep） of 500 metres in the ocean.
4.There were so many cars held up by the heavy rain on the road that we had no alternative but （wait）.
5.In a world still facing so many problems， it is essential for us （create） a global community with a shared future of peace and prosperity.
Ⅳ.选用方框中的短语并用其适当形式填空
over time， in use， as for， in turn， focus on， for instance， in addition， nowhere near
1. ， some old traditions are gradually forgotten.
2.The advancement of technology can boost education. ， the development of education can contribute to technological progress.
3.He would become nervous whenever attention him.
4.To save electricity， we should turn off household appliances not ， such as lights， TVs and computers.
5. my favourite figure in Chinese history， it must be Wei Yuan， a great thinker in the late Qing Dynasty.
6.The company provides cheap Internet access. ， it makes shareware freely available.
7.We only have 100 and that is enough to buy a computer.
8.Many natural means have been used in organic farming. ， animal waste is used to keep the soil fertile.
Ⅴ.根据汉语提示完成句子
1.他从玛丽那里得到了运动会被推迟的消息。（同位语从句）
He got the news from Mary .
2.要解决所有的环境问题依然任重而道远。（way）
all the problems concerning the environment.
3.你的任务是替换这些单词让这句话讲得通。（不定式作表语）
so that the sentence makes sense.
4.他不但读了这本书，而且记得所读的内容。（not only ...but also ...）
He what he had read.
5.既然我考试及格了，我可以做我喜欢的事了。（now that）
， I can do whatever I like.
Ⅰ.阅读理解
A
主题语境：人与社会之农业发展 语篇类型：说明文 建议用时：8分钟
When you think of a new place for growing food， you might think of Mars. But one Italian family believes one possible place is right here on the Earth： the ocean.
Nemo’s Garden is the world’s first underwater cultivation system of land plants. Located off the coast of Noli， Italy， it consists of several greenhouses called biospheres， each of which is attached to the seafloor. “The aim of it is to change agriculture， and add a possibility for growing produce in the ocean，” says co-founder Luca Gamberini.
His father Sergio Gamberini came up with the idea by combining his two passions—diving and gardening. In 2012， the project began with planting basil （罗勒） underwater. Now Nemo’s Garden is growing strong.
“Our limited number of resources can not promise sustainable （可持续的） development，” Luca says， “and we believe that underwater gives us some advantages over traditional agriculture.”
Floating six to ten meters underwater， plants in Nemo’s Garden are separated from any outside pathogens （病原体）. Also， the temperature of the ocean water is an ideal environment for plant life. Besides， Nemo’s Garden uses a technique that uses water-based nutrients （养分） instead of soil. “Also， there is little interaction with the underwater environment and related ecosystems， which means no harm is caused to sea creatures，” adds Luca.
Everything is monitored on land through cameras and sensors， and settings can be adjusted. When it’s time to harvest， a diver will cut the vegetation， place it in bags and float it to the surface.
The team at Nemo’s Garden has plans for even bigger biospheres in the future， as well as other locations. Luca believes the future of Nemo’s Garden will be mostly along the coastlines where communities could benefit from the added space it offers.
1.What does the underlined word “it” in Paragraph 2 refer to？（ ）
A.The greenhouse.
B.The seafloor.
C.Underwater system.
D.Nemo’s Garden.
2.Why did Luca start the underwater cultivation system？（ ）
A.To combine his two hobbies.
B.To feed the growing population.
C.To seek sustainable farming.
D.To develop healthy ways of life.
3.What’s the main idea of Paragraph 5？（ ）
A.The advantages of Nemo’s Garden.
B.The construction of Nemo’s Garden.
C.The structure of Nemo’s Garden.
D.The techniques used in Nemo’s Garden.
4.Where is the text most probably taken from？（ ）
A.A research paper.
B.A science magazine.
C.A journal entry.
D.A science fiction.
B
主题语境：人与社会之农业发展 语篇类型：说明文 建议用时：8分钟
Vertical farming is a hugely promising farming method that aims to produce more food to feed the growing population on our planet with limited natural resources.It includes growing in vertical frames （垂直框架） or even in high-rise buildings while farms are moved into urban areas， and producing nutritious crops without topsoil.
The farmers plant crops in nutrient-rich water， so plants can be raised without soil.They also grow plants using water from fish tanks， or using nutrient water mist systems that reduce water use by huge amounts， which is a technique developed by NASA as a way for astronauts to live in space and feed themselves while preserving precious water supplies.All of these soilless growing techniques use less or no chemicals， and recycle water with less waste.Plants can be grown and harvested all year round， free from natural disasters such as drought or flooding.
“This is the farming of the future，” said Paul Myers， co-founder of the vertical farming enterprise Farm Urban， “chemical-free and moved from the traditional agriculture to a more sustainable approach.”
The global vertical farming market is expected to be bigger.This is fueled in part by increasing demand for organic， chemical-free foods， but also by countries looking to increase their food security and cut down on imports， the UK， for example.It uses around 25 percent of its land as cultivated land but imports much of its food.
As the vertical farming industry expands， it is worth noting that it has limitations—it only works for some crops， and urban locations can be expensive.
5.Where will vertical farming be popular in the future？（ ）
A.In cities. B.In plains.
C.In deserts. D.In the countryside.
6.What do the techniques mentioned in Paragraph 2 have in common？（ ）
A.Waste-free. B.Nutrient-rich.
C.Soilless. D.Waterproof.
7.Why is vertical farming promising？（ ）
A.The trade routes are secure.
B.Organic food is increasingly popular.
C.The economic benefit is substantial.
D.Imports are becoming more difficult.
8.What is the best title for the text？（ ）
A.Vertical Farming： How to Save Soil and Water
B.Vertical Farming： What to Plant in a New Way
C.Vertical Farming： Lowering Environmental Impact
D.Vertical Farming： Raising Agriculture’s Potential
Ⅱ.阅读七选五
主题语境：人与自我之饮食健康 语篇类型：说明文 建议用时：8分钟
Think back to the last time you shopped for fruit and vegetables. You may have noticed some items labelled with the word “organic”.1.（ ）
“Organic” refers to the way food is grown. To be labelled as organic， food production must meet strict guidelines. These can be different depending on where you live. In the United States， organic food must be grown or raised without using pesticides or chemical fertilizers.
2.（ ） That changed after the Industrial Revolution. During the 20th century， many ideas that were used by factories and big businesses were put into action on farms. This helped some farms grow larger and produce more.
The organic movement was started to get back to the old traditional ways of farming. Why？ Many believe the chemicals and pesticides used in modern farming can be harmful to your health.3.（ ） And those who support the organic movement also point to its benefits for the environment.
Have you ever compared organic and non-organic food at the grocery store？ If so， you know that organic food tends to cost more. This happens for many reasons. Organic farming produces fewer crops.4.（ ） Additionally， organic farms spend more money taking care of the animals they raise. These and other factors drive the cost of organic food up.
Is organic food worth the extra cost？ Some people believe it is. They may think it tastes better or just prefer to eat food that has not been grown using chemicals.5.（ ） They are still trying to find a major difference between organic and non-organic food in terms of safety， nutrition， or taste. Still， others argue that the environmental benefits of organic food make it worth the price.
A.Have you ever wondered what that means？
B.The cost of production is also usually higher.
C.For most of history， almost all food was organic.
D.Many people are willing to pay more for organic food.
E.Some also think organic food is naturally more nutritious.
F.Are you wondering if organic food is right for you？
G.Scientists have studied organic and non-organic food for many years now.
Period 3 Using Language， Assessing
Your Progress & Video Time
[夯基固本——一遍过]
Ⅰ.1.aspects 2.root 3.widespread 4.alleviate
5.grocery 6.organic
Ⅱ.1.动词； 消化 2.动词； 领会，领悟 3.名词； 摘要
Ⅲ.1.entirely 2.nutritious 3.depth 4.to wait
5.to create
Ⅳ.1.Over time 2.In turn 3.was focused on
4.in use 5.As for 6.In addition
7.nowhere near 8.For instance
Ⅴ.1.that the sports meeting was put off
2.There is still a long way to solve
3.Your task is to replace these words
4.not only read the book， but also remembered
5.Now that I have passed my exams
[对标高考——全练通]
Ⅰ.
语篇解读：文章主要讲述了意大利的Nemo’s Garden项目，这是世界上第一个水下种植系统，旨在通过在海洋中种植作物来改变农业，并增加在海洋中种植农产品的可能性。1.D 代词指代题。根据画线词前面的内容Nemo’s Garden is the world’s first underwater cultivation system of land plants.可知，此处画线词it指代的是前文的Nemo’s Garden。
2.C 细节理解题。根据第四段内容可知，有限的资源无法保证可持续的发展，因此卢卡开始水下种植农产品的目的是寻找可持续发展的农业。
3.A 段落大意题。根据第五段内容可知，Nemo’s Garden能够与外界的病原体隔离，以及该项目采用的是利用水基养分而不是土壤的技术，故本段主要讲述的是Nemo’s Garden项目的优势。
4.B 文章出处题。通读全文，这篇文章主要讲述了意大利的Nemo’s Garden项目，这是世界上第一个水下种植系统，旨在通过在海洋中种植作物来改变农业，并增加在海洋中种植农产品的可能性。故推断本文可能出自一本科学杂志。
语篇解读：文章介绍了垂直农业的特点、好处和发展前景。
5.A 细节理解题。根据第一段中的It includes growing in vertical frames （垂直框架） or even in high-rise buildings while farms are moved into urban areas可知，垂直农业未来将流行于城市地区。
6.C 细节理解题。根据第二段中的The farmers plant crops in nutrient-rich water ...while preserving precious water supplies.以及All of these soilless growing techniques可知，第二段提到的技术的共同点是“无土”。
7.B 细节理解题。根据第四段中的The global vertical farming market is expected to be bigger.This is fueled in part by increasing demand for organic， chemical-free foods可知，垂直农业前景广阔的原因之一是有机食品越来越受欢迎。
8.D 标题归纳题。通读全文内容可知，文章主要介绍了垂直农业的特点、好处和发展前景，强调了垂直农业的发展潜力。因此，D项（垂直农业：提升农业潜力）可以作为本文的最佳标题。
Ⅱ.
语篇解读：文章介绍了关于有机食品的一些相关信息。1.A 上文提到你去超市时可能注意到一些标有“有机”字样的物品，下文提到“有机”是指食物的生长方式，并说明了什么样的食物才能称为“有机”食品。结合选项可知，A项（你有没有想过那是什么意思？）能够承上启下，切题。
2.C 根据空后的That changed after the Industrial Revolution.可知，空处应提到That所指代的内容，并说明工业革命前的情况；再根据下文提到的20世纪时农场种植方式的变化可知，C项（在历史上大部分时间里，几乎所有的食物都是有机的）符合语境。
3.E 本段开头两句提出为什么有机运动开始回归古老的传统耕作方式，空处和空前后内容是对此提问作出的解释说明。空前一句提到许多人认为现代农业中使用的化学物质和杀虫剂对健康有害，空处承接上文说明另一些人的看法，故E项（一些人还认为有机食品自然更有营养）切题。
4.B 根据上文If so， you know that organic food tends to cost more. This happens for many reasons.可知，有机食品往往价格更高，这有很多原因。空前一句提到的“有机农业生产的作物更少”是其中一个原因，空处承接上文，继续说明有机食品价格高的原因，故B项（生产成本通常也更高）切题。
5.G 根据空后一句的They are still trying to find a major difference between organic and non-organic food in terms of safety， nutrition， or taste.可知，空处应提到They的具体所指，且结合常识可知，研究有机食品和非有机食品在安全性、营养或味道方面的主要区别应该是科学家做的事，故G项（科学家们已经研究有机和非有机食品多年了）切题。
1 / 7(共35张PPT)
夯基固本——一遍过
对标高考——全练通
Period 3 Using Language， Assessing Your Progress & Video Time
Ⅰ.根据句意并结合首字母或汉语提示写单词
1. To my amazement，his opinion is similar to mine in many a .
2. We need to get to the r of the problem before we can solve it.
3. The plan received w support throughout the country.
4. He told a joke to （缓解）the tense atmosphere in the room.
5. She summed up the bills from the g with great care.
6. One of the advantages of （有机的） farming is its
positive impact on our environment as a whole.
spects
oot
idespread
alleviate
rocery
organic
Ⅱ.一词多义
1. The food will digest more quickly if you chew it a little more.
词性： 词义：
2. He paused， waiting for her to digest the information.
词性： 词义：
3. The company publishes a monthly digest of its activities.
词性： 词义：
动词
消化
动词
领会，领悟
名词
摘要
Ⅲ.单句语法填空
1. She devoted herself （entire）to her research，which
earned her a pretty good reputation in her field.
2. It is important for us to have a （nutrition）
breakfast， for it can keep us full of energy in the morning.
3. There is no fish of this kind at a （deep） of 500 metres
in the ocean.
4. There were so many cars held up by the heavy rain on the road that
we had no alternative but （wait）.
5. In a world still facing so many problems， it is essential for us
（create） a global community with a shared future of
peace and prosperity.
entirely
nutritious
depth
to wait
to
create
Ⅳ.选用方框中的短语并用其适当形式填空
over time， in use， as for， in turn， focus on， for instance， in
addition， nowhere near
1. ， some old traditions are gradually forgotten.
2. The advancement of technology can boost education. ，
the development of education can contribute to technological
progress.
3. He would become nervous whenever attention
him.
Over time
In turn
was focused on
4. To save electricity， we should turn off household appliances
not ， such as lights， TVs and computers.
5. my favourite figure in Chinese history， it must be Wei
Yuan， a great thinker in the late Qing Dynasty.
6. The company provides cheap Internet access. ， it
makes shareware freely available.
7. We only have $100 and that is enough to buy a computer.
8. Many natural means have been used in organic farming.
， animal waste is used to keep the soil fertile.
in use
As for
In addition
nowhere near
For
instance
Ⅴ.根据汉语提示完成句子
1. 他从玛丽那里得到了运动会被推迟的消息。（同位语从句）
He got the news from Mary .
2. 要解决所有的环境问题依然任重而道远。（way）
all the problems concerning
the environment.
3. 你的任务是替换这些单词让这句话讲得通。（不定式作表语）
so that the sentence makes
sense.
that the sports meeting was put off
There is still a long way to solve
Your task is to replace these words
4. 他不但读了这本书，而且记得所读的内容。（not only ...but
also ...）
He what he had
read.
5. 既然我考试及格了，我可以做我喜欢的事了。（now that）
， I can do whatever I like.
not only read the book， but also remembered
Now that I have passed my exams
Ⅰ.阅读理解
A
主题语境：人与社会之农业发展 语篇类型：说明文
建议用时：8分钟
When you think of a new place for growing food， you might
think of Mars. But one Italian family believes one possible place is
right here on the Earth： the ocean.
Nemo’s Garden is the world’s first underwater cultivation
system of land plants. Located off the coast of Noli，Italy，it consists of several greenhouses called biospheres，each of which is attached to the seafloor. “The aim of it is to change agriculture， and add a possibility for growing produce in the ocean，” says co-founder Luca Gamberini.
His father Sergio Gamberini came up with the idea by combining
his two passions—diving and gardening. In 2012， the project began
with planting basil （罗勒） underwater. Now Nemo’s Garden is
growing strong.
“Our limited number of resources can not promise sustainable
（可持续的） development，” Luca says， “and we believe that
underwater gives us some advantages over traditional agriculture.”
Floating six to ten meters underwater， plants in Nemo’s
Garden are separated from any outside pathogens （病原体）. Also，
the temperature of the ocean water is an ideal environment for plant
life. Besides， Nemo’s Garden uses a technique that uses water-
based nutrients （养分） instead of soil. “Also， there is little
interaction with the underwater environment and related ecosystems，which means no harm is caused to sea creatures，” adds Luca.
Everything is monitored on land through cameras and sensors，
and settings can be adjusted. When it’s time to harvest， a diver will
cut the vegetation， place it in bags and float it to the surface.
The team at Nemo’s Garden has plans for even bigger biospheres in the future， as well as other locations. Luca believes the future of Nemo’s Garden will be mostly along the coastlines where communities could benefit from the added space it offers.
语篇解读：文章主要讲述了意大利的Nemo’s Garden项目，这是世
界上第一个水下种植系统，旨在通过在海洋中种植作物来改变农业，并增加在海洋中种植农产品的可能性。
1. What does the underlined word “it” in Paragraph 2 refer to？
A. The greenhouse. B. The seafloor.
C. Underwater system. D. Nemo’s Garden.
解析：代词指代题。根据画线词前面的内容Nemo’s Garden is the
world’s first underwater cultivation system of land plants.可知，
此处画线词it指代的是前文的Nemo’s Garden。
√
2. Why did Luca start the underwater cultivation system？
A. To combine his two hobbies.
B. To feed the growing population.
C. To seek sustainable farming.
D. To develop healthy ways of life.
解析：细节理解题。根据第四段内容可知，有限的资源无法保证
可持续的发展，因此卢卡开始水下种植农产品的目的是寻找可持
续发展的农业。
√
3. What’s the main idea of Paragraph 5？
A. The advantages of Nemo’s Garden.
B. The construction of Nemo’s Garden.
C. The structure of Nemo’s Garden.
D. The techniques used in Nemo’s Garden.
解析：段落大意题。根据第五段内容可知，Nemo’s Garden能够
与外界的病原体隔离，以及该项目采用的是利用水基养分而不是
土壤的技术，故本段主要讲述的是Nemo’s Garden项目的优势。
√
4. Where is the text most probably taken from？
A. A research paper. B. A science magazine.
C. A journal entry. D. A science fiction.
解析：文章出处题。通读全文，这篇文章主要讲述了意大利的
Nemo’s Garden项目，这是世界上第一个水下种植系统，旨在通
过在海洋中种植作物来改变农业，并增加在海洋中种植农产品的
可能性。故推断本文可能出自一本科学杂志。
√
B
主题语境：人与社会之农业发展 语篇类型：说明文
建议用时：8分钟
Vertical farming is a hugely promising farming method that aims
to produce more food to feed the growing population on our planet
with limited natural resources.It includes growing in vertical frames
（垂直框架） or even in high-rise buildings while farms are moved
into urban areas， and producing nutritious crops without topsoil.
The farmers plant crops in nutrient-rich water， so plants can be
raised without soil.They also grow plants using water from fish
tanks， or using nutrient water mist systems that reduce water use by
huge amounts， which is a technique developed by NASA as a way for
astronauts to live in space and feed themselves while preserving
precious water supplies.All of these soilless growing techniques use
less or no chemicals， and recycle water with less waste.Plants can be
grown and harvested all year round， free from natural disasters such
as drought or flooding.
“This is the farming of the future，” said Paul Myers， co-
founder of the vertical farming enterprise Farm Urban， “chemical-
free and moved from the traditional agriculture to a more sustainable
approach.”
The global vertical farming market is expected to be bigger.This
is fueled in part by increasing demand for organic， chemical-free
foods， but also by countries looking to increase their food security
and cut down on imports， the UK， for example.It uses around 25
percent of its land as cultivated land but imports much of its food.
As the vertical farming industry expands， it is worth noting that
it has limitations—it only works for some crops， and urban locations
can be expensive.
语篇解读：文章介绍了垂直农业的特点、好处和发展前景。
5. Where will vertical farming be popular in the future？
A. In cities. B. In plains.
C. In deserts. D. In the countryside.
解析：细节理解题。根据第一段中的It includes growing in vertical
frames （垂直框架） or even in high-rise buildings while farms are
moved into urban areas可知，垂直农业未来将流行于城市地区。
√
6. What do the techniques mentioned in Paragraph 2 have in
common？
A. Waste-free. B. Nutrient-rich.
C. Soilless. D. Waterproof.
解析：细节理解题。根据第二段中的The farmers plant crops in
nutrient-rich water ...while preserving precious water supplies.以
及All of these soilless growing techniques可知，第二段提到的技术
的共同点是“无土”。
√
7. Why is vertical farming promising？
A. The trade routes are secure.
B. Organic food is increasingly popular.
C. The economic benefit is substantial.
D. Imports are becoming more difficult.
解析：细节理解题。根据第四段中的The global vertical farming
market is expected to be bigger.This is fueled in part by increasing
demand for organic， chemical-free foods可知，垂直农业前景广阔
的原因之一是有机食品越来越受欢迎。
√
8. What is the best title for the text？
A. Vertical Farming： How to Save Soil and Water
B. Vertical Farming： What to Plant in a New Way
C. Vertical Farming： Lowering Environmental Impact
D. Vertical Farming： Raising Agriculture’s Potential
解析：标题归纳题。通读全文内容可知，文章主要介绍了垂直农
业的特点、好处和发展前景，强调了垂直农业的发展潜力。因
此，D项（垂直农业：提升农业潜力）可以作为本文的最佳标题。
√
Ⅱ.阅读七选五
主题语境：人与自我之饮食健康 语篇类型：说明文
建议用时：8分钟
Think back to the last time you shopped for fruit and vegetables.
You may have noticed some items labelled with the word
“organic”.1.（ ）
A
“Organic” refers to the way food is grown. To be labelled as
organic， food production must meet strict guidelines. These can be
different depending on where you live. In the United States， organic
food must be grown or raised without using pesticides or chemical
fertilizers.
2. （ ） That changed after the Industrial Revolution. During
the 20th century， many ideas that were used by factories and big
businesses were put into action on farms. This helped some farms
grow larger and produce more.
The organic movement was started to get back to the old
traditional ways of farming. Why？ Many believe the chemicals and pesticides used in modern farming can be harmful to your health.3.（ ） And those who support the organic movement also point to its benefits for the environment.
C
E
Have you ever compared organic and non-organic food at the
grocery store？ If so， you know that organic food tends to cost more.
This happens for many reasons. Organic farming produces fewer
crops.4.（ ） Additionally， organic farms spend more money
taking care of the animals they raise. These and other factors drive the
cost of organic food up.
B
Is organic food worth the extra cost？ Some people believe it is.
They may think it tastes better or just prefer to eat food that has not
been grown using chemicals.5.（ ） They are still trying to find
a major difference between organic and non-organic food in terms of
safety， nutrition， or taste. Still， others argue that the
environmental benefits of organic food make it worth the price.
A. Have you ever wondered what that means？
B. The cost of production is also usually higher.
C. For most of history， almost all food was organic.
D. Many people are willing to pay more for organic food.
G
E. Some also think organic food is naturally more nutritious.
F. Are you wondering if organic food is right for you？
G. Scientists have studied organic and non-organic food for many
years now.
语篇解读：文章介绍了关于有机食品的一些相关信息。
1. 上文提到你去超市时可能注意到一些标有“有机”字样的物
品，下文提到“有机”是指食物的生长方式，并说明了什么样的食物
才能称为“有机”食品。结合选项可知，A项（你有没有想过那是什
么意思？）能够承上启下，切题。
2. 根据空后的That changed after the Industrial Revolution.可知，
空处应提到That所指代的内容，并说明工业革命前的情况；再根据下
文提到的20世纪时农场种植方式的变化可知，C项（在历史上大部分
时间里，几乎所有的食物都是有机的）符合语境。
3. 本段开头两句提出为什么有机运动开始回归古老的传统耕作方
式，空处和空前后内容是对此提问作出的解释说明。空前一句提到许
多人认为现代农业中使用的化学物质和杀虫剂对健康有害，空处承接
上文说明另一些人的看法，故E项（一些人还认为有机食品自然更有
营养）切题。
4. 根据上文If so， you know that organic food tends to cost more.
This happens for many reasons.可知，有机食品往往价格更高，这有
很多原因。空前一句提到的“有机农业生产的作物更少”是其中一个
原因，空处承接上文，继续说明有机食品价格高的原因，故B项（生
产成本通常也更高）切题。
5. 根据空后一句的They are still trying to find a major difference
between organic and non-organic food in terms of safety， nutrition，
or taste.可知，空处应提到They的具体所指，且结合常识可知，研究
有机食品和非有机食品在安全性、营养或味道方面的主要区别应该是
科学家做的事，故G项（科学家们已经研究有机和非有机食品多年
了）切题。
谢 谢 观 看 ！
