题目内容
17．请阅读下而的文字及图表，然后按照要求用英语写一篇150词左右的文章．
【写作内容】
（1）用约30个单词概述上述信息的主要内容；
（2）综合上述信息，简要分析导致青少年近视的主要原因；
（3）根据你的分析，从学校规范和个人行为两方面谈谈你得到的启示（不少于两点）．
【写作要求】
（1）4作过枵屮不能立接引用原文语句；
（2）作文中不能山现真实姓名和学校名称；
（3）小必写标题．
【评分标准】
内容完整，语言规范，语篇连贯，词数适当．
分析 写好这类作文要注意几个步骤：1． 认真审题，找准提示语中的关键词或句，确定中心思想．2． 依据关键句，草拟提纲，梳理文章的脉络3． 准确定位人称、时态．注意使用高级词汇和高级句型使文章显得更有档次．4．最后还要认真查验是否有漏写情况，有无拼写错误及标点误用等
高分句型一：
More and more young people are getting nearsighted，which can be determined by some symptoms．
越来越多的年轻人越来越近视，这可以通过一些症状来确定的．
高分句型二：
For many of young people，it is their routine to be buried in their books from morning till night while others often keep their eyes fixed on the computer or TV．
对于许多年轻人，是埋在他们的书从早上到晚上也经常保持他们的眼睛固定在电脑或电视的常规．
解答 One possible version：
More and more young people are getting nearsighted，which can be determined by some symptoms（高分句型一）．The ever-increasing rate of nearsightedness in almost every school throughout China has become so alarming．
For many of young people，it is their routine to be buried in their books from morning till night while others often keep their eyes fixed on the computer or TV（高分句型二）．Their eyes are burdened so heavily that they can hardly function normally in the end．What's worse，every year quite some students cannot go to their ideal colleges or get their dream jobs owing to their poor eyesight．
Now it is time that schools took action to protect students'eyesight by giving them lectures*ensuring proper lighting in classrooms，and limiting their time of reading books or doing exercises，prevent my eyesight from
As for me，I will immediately try every possible means to getting weak*eye exercises included．
点评 开放性作文给出一定的写作主题，并此为基础进行思维和联想，自由发挥．不仅考查学生在内容、结构安排、语言运用和组织方面的能力，而且对学生的想像力、发散思维、归纳判断能力也有很高的要求．
| A． | acquires | B． | adapts | C． | achieves | D． | adopts |
| A． | defining | B． | assuming | C． | guaranteeing | D． | assuring |
| A． | it | B． | which | C． | them | D． | those |
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 piocesses．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 m 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．I'he 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 6inches in height and width．
Another reality check is print speed．，You'll be able to knock out a days worth of chores（琐事）while the primer 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 liegiliners'Gmk to 3D Printing．
| What is 3D printing？ | 3D printing is a process of making three-dimens ion objects out of a digital file． An object created with 3D printing （71）consistsof a number of layers of material． |
| How does 3D printing （72）work？ | The first （73）stepis to make a virtual design of your （74）desire\wanted\targetobject． A（75）prepared3D model is slictxl into a hujzc number of layers with software or some （76）toolfor a certain 3D printer． The sliced model is （77）fedto a 3D printer The 3D printer （78）forme\makesthe layers into an entire object step by step． |
| What else do you need to know？ | The （79）sizeof what you intend to make is a factor in your choice of a 3D printer， Prim speed is associated with print （80）quality． |