Question

【题目】We see the world in three dimensions. Now, we can print in three dimensions, too, thanks to a manufacturing process: 3D printing.

3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file.

The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive (连续的) layers of material until the object is created. Each of these layers can be seen as a thinly sliced horizon till (水平的) cross-section of the eventual object. Today’s 3D printers are being used to print everything from design models to jewelry, crafts, product parts, body parts, and even food.

3D printing starts with making a virtual design of the object you want to create. This virtual design is for instance a CAD (Computer Aided Design) file. This CAD file is created using a 3D modeling application or with a 3D scanner (to copy an existing object). A 3D scanner can make a 3D digital copy of an object.

You will have to prepare a 3D model before it is ready to be 3D printed. This is what they call slicing. Slicing is dividing a 3D model into hundreds or thousands of horizontal layers and needs to be done with software.

Sometimes a 3D model can be sliced from within a 3D modeling software application. It is also possible that you are forced to use a certain slicing tool for a certain 3D printer.

When the 3D model is sliced, you are ready to feed it to your 3D printer. This can be done via USB. SD or WiFi. It really depends on what brand and type 3D printer you have.

When a file is uploaded in a 3D printer, the object is ready to be 3D printed layer by layer. The 3D printer reads every slice (2D image) and creates a three dimensional object.

Before you pick up a 3D printer and experimenting in the 3D world, consider how big the objects you might want to create. If your goal is to print foot-long rulers, you’ll fall short of that goal if the printer you choose can only handle objects smaller 6 inches in height and width.

Another reality check is print speed. You’ll be able to knock out a day’s worth of chores (琐事) while the printer is running, with a typical 4-inch model requiring as many as 12 hours to print. As with ordinary printers, print speed also depends on how well it prints.

Title: A Beginners’ Guide to 3D Printing

What is 3D printing?	3D printing is a process of making three-dimension objects out of a digital file. An object created with 3D printing 【1】 of a number of layers of material.
How does 3D printing 【2】?	The first 【3】is to make a virtual design of your 【4】 object. A 【5】 3D model is sliced into a huge number of layers with software or some 【6】 for a certain 3D printer. The sliced model is 【7】 to a 3D printer The 3D printer 【8】 the layers into an entire object step by step.
What else do you need to know?	The【9】of what you intend to make is a factor in your choice of a 3D printer. Print speed is associated with print 【10】.

Answer 1

【答案】

【1】consists

【2】work

【3】step

【4】desired/wanted/target

【5】prepared

【6】tool

【7】fed

【8】form/make

【9】size

【10】quality

【解析】文章介绍了什么是3D打印机，其工作原理及使用时的注意事项。

【1】consists

考查动词。根据第三段The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive (连续的) layers of material until the object is created.可知，3D打印机是通过连续铺设材料层打印出物体的，consist of“由……组成”，故填consists。

【2】work

考查动词。文章的主要部分讲3D打印机的工作过程，所以问题应该是“3D打印机是怎样工作的？”，故填work。

【3】step

考查名词。根据第四段3D printing starts with making a virtual design of the object you want to create.可知，3D打印的第一步是开始创建对象的虚拟设计。表示第一步，故填step。

【4】desired/wanted/target

考查形容词。此处和the object you want to create同义，修饰object用形容词，表示你想要创建的物体或目标物，故填desired/Wanted/target。

【5】prepared

考查形容词。根据第五段You will have to prepare a 3D model before it is ready to be 3D printed. This is what they call slicing. Slicing is dividing a 3D model into hundreds or thousands of horizontal layers and needs to be done with software.可知，在3D打印出来之前，必须准备好一个3D模型。这就是所谓的切片。切片将3D模型分割成成百上千的水平层，需要用软件完成。所以此处指准备好的3D模型，故填prepared。

【6】tool

考查名词。根据第六段Sometimes a 3D model can be sliced from within a 3D modeling software application. It is also possible that you are forced to use a certain slicing tool for a certain 3D printer.（3D模型可以在3D建模软件应用程序中进行切割。也有可能你被迫为某台3D打印机使用某种切片工具。）由此可知，3D模型处理过程中需要某些专门的软件应用工具，故填tool。

【7】fed

考查过去分词。根据第七段When the 3D model is sliced, you are ready to feed it to your 3D printer.可知，当3D模型被切片时，你就可以将它输入3D打印机。与feed it to同义此处是被动，故填fed。

【8】form/make

考查动词。根据第八段When a file is uploaded in a 3D printer. the object is ready to be 3D printed layer by layer. The 3D printer reads every slice (2D image) and creates a three dimensional object.（当一个文件被上传到3D打印机上，该物体就可以按层进行3D打印。3D打印机读取每个切片(2D图像)，并创建一个三维图像。）由此可知，3D打印机会把许多层部分打印成一个整体，故填form/make。

【9】size

考查名词。根据倒数第二段consider how big the objects you might want to create可知，打印前要先考虑好想要打印的尺寸，故填size。

【10】quality

考查名词。根据最后一段Another reality check is print speed.和print speed also depends on how well it prints.可知，打印速度和打印质量有关。故填quality。