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3D printing is an amazing technology, and it has changed the way we make things. It was first invented in the 1980s and has developed a lot since then.
The process of 3D printing is really interesting. First, we need to design a 3D model of the object we want to make using special computer software. Then, the 3D printer reads the model and starts to build the object layer by layer. It uses different materials like plastic and metal to create the object.
3D printing has many great uses. It can be used in the medical field, factories and so on. It can make parts for cars, airplanes, and other machines. It can also be used to make beautiful jewelry（珠宝）and toys.
Another advantage of 3D printing is that it can save a lot of materials. Unlike traditional methods in factories where a lot of material is cut away and wasted, 3D printing only uses the amount of material needed to build the object.
However, 3D printing also has some problems. The 3D printers and the materials can be quite expensive, so not everyone can afford them. Also, the printing speed is usually slower than traditional methods. It takes more time to make a large number of products.
In the future, 3D printing will probably become more and more popular and advanced（先进的）. We may be able to print houses and even human organs（器官）with it. It will bring more convenience and possibilities to our lives.
根据短文内容,回答下列问题。
1. When was 3D printing first invented?
2. What does 3D printing often use to create objects?
3. Where can 3D printing be used?
4. Which has a slower speed, 3D printing or traditional methods in factories?
5. What will 3D printing bring to our lives in the future?
The process of 3D printing is really interesting. First, we need to design a 3D model of the object we want to make using special computer software. Then, the 3D printer reads the model and starts to build the object layer by layer. It uses different materials like plastic and metal to create the object.
3D printing has many great uses. It can be used in the medical field, factories and so on. It can make parts for cars, airplanes, and other machines. It can also be used to make beautiful jewelry（珠宝）and toys.
Another advantage of 3D printing is that it can save a lot of materials. Unlike traditional methods in factories where a lot of material is cut away and wasted, 3D printing only uses the amount of material needed to build the object.
However, 3D printing also has some problems. The 3D printers and the materials can be quite expensive, so not everyone can afford them. Also, the printing speed is usually slower than traditional methods. It takes more time to make a large number of products.
In the future, 3D printing will probably become more and more popular and advanced（先进的）. We may be able to print houses and even human organs（器官）with it. It will bring more convenience and possibilities to our lives.
根据短文内容,回答下列问题。
1. When was 3D printing first invented?
In the 1980s.
2. What does 3D printing often use to create objects?
Different materials like plastic and metal.
3. Where can 3D printing be used?
It can be used in the medical field, factories and so on.
4. Which has a slower speed, 3D printing or traditional methods in factories?
3D printing.
5. What will 3D printing bring to our lives in the future?
It will bring more convenience and possibilities.
答案
1. In the 1980s.
2. Different materials like plastic and metal.
3. It can be used in the medical field, factories and so on.
4. 3D printing.
5. It will bring more convenience and possibilities.
2. Different materials like plastic and metal.
3. It can be used in the medical field, factories and so on.
4. 3D printing.
5. It will bring more convenience and possibilities.
解析
【分析】本题为阅读理解细节查找题，解题思路是先明确每个问题的核心关键词，再带着关键词回到短文中定位对应内容，最后提取原文中的相关信息即可得到答案。
【解析】1. 针对问题1，定位短文第一段第二句“It was first invented in the 1980s”，提取时间信息；2. 针对问题2，定位短文第二段最后一句“It uses different materials like plastic and metal to create the object”，提取材料信息；3. 针对问题3，定位短文第三段第一句“It can be used in the medical field, factories and so on”，提取使用领域信息；4. 针对问题4，定位短文第五段第三句“Also, the printing speed is usually slower than traditional methods”，对比得出3D打印速度更慢；5. 针对问题5，定位短文最后一段最后一句“It will bring more convenience and possibilities to our lives”，提取未来影响信息。
【答案】1. In the 1980s.
2. Different materials like plastic and metal.
3. It can be used in the medical field, factories and so on.
4. 3D printing.
5. It will bring more convenience and possibilities.
【知识点】阅读理解（细节理解）
【点评】本题为基础的阅读理解细节查找题，所有答案均可直接从原文中定位提取，主要考查学生快速定位关键信息的能力，难度较低。
【难度系数】0.8
【解析】1. 针对问题1，定位短文第一段第二句“It was first invented in the 1980s”，提取时间信息；2. 针对问题2，定位短文第二段最后一句“It uses different materials like plastic and metal to create the object”，提取材料信息；3. 针对问题3，定位短文第三段第一句“It can be used in the medical field, factories and so on”，提取使用领域信息；4. 针对问题4，定位短文第五段第三句“Also, the printing speed is usually slower than traditional methods”，对比得出3D打印速度更慢；5. 针对问题5，定位短文最后一段最后一句“It will bring more convenience and possibilities to our lives”，提取未来影响信息。
【答案】1. In the 1980s.
2. Different materials like plastic and metal.
3. It can be used in the medical field, factories and so on.
4. 3D printing.
5. It will bring more convenience and possibilities.
【知识点】阅读理解（细节理解）
【点评】本题为基础的阅读理解细节查找题，所有答案均可直接从原文中定位提取，主要考查学生快速定位关键信息的能力，难度较低。
【难度系数】0.8
