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杆机构的运动情况，尤其是当其它的运动构件也出现在同一个运动简图中的时候。对比较复杂的机构进行运动分析的第一步骤是：绘制出和原运动相一致的结构示意图。这个结构示意图所起的作用和电路图比较相似，旨在表达机构的必须构架，这些必须的构架可以体现出影响机构运动的一些关键尺寸。
（2）The industrial robot is a tool that is used in the manufacturing environment to increase productivity . It can be used to do routine and tedious assembly line job , or it can perform jobs that might be hazardous to the human worker . For example , one of the first industrial robots was used to replace the nuclear fuel rods in nuclear power plants . A human doing this job might be exposed to armful amounts of radiation . The industrial robot can also operate on the assembly line , putting together small components , such as placing electronic components on a printed circuit board . Thus , the human worker can be relieved of the routing operation of this tedious task . 参考答案（满分20分）（翻译的内容，达到意思一致即算正确）：工业机器人是一个用来提高生产效率的工具。它可被用于执行一些枯燥又乏味的生产线流水作业，或是用于执行一些对于生产工人来说是比较危险（或：有危害）的工作。比如：第一批工业机器人中的一些机器人就是被用于更换核电站的核燃料棒的。如果工人来执行这项工作，就会暴露于有害的核辐射之中。工业机器人还可以用来操作生产流水线工作，组装小部件，比如：更换印刷电路板上的电子器件。这样的话，工人就可以免于从事这样一些乏味枯燥的流水线操作了。 四、英文写作能力（20分） 说明：请在以下两个题目中任意选择一个作为写作对象，要求文章不少于120字，英文流畅，无错误拼写和语法错误，用词要规范，两个题目重复写不加分。 （1）简要介绍你对目前所学（机械制造）专业的认识； （2）根据你对词组“CAD”、“CAM”的理解和认识，把它们组织成一篇短文，要求前后文连贯，逻辑性强。 答案：（省略）。 评分说明：
0分：没有写作内容
1~5分：不能达到写作的说明要求，语句不通顺，内容前后不连贯，有很多语法和拼写错误。 6~10：基本达到写作的说明要求，较多语句不通顺，较多内容前后不连贯，较多语法和拼写错误。
11~15：基本达到写作的说明要求，少数语句不通顺，少数内容前后不连贯，少数语法和拼写错误。字数基本达到要求。
16~20：基本达到写作的说明要求，极少数语句不通顺，极少数内容前后不连贯，极少数语法和拼写错误。字数基本达到要求。
With the development of science , more and more people are confused that whether it is good or bad to make robort. Are roborts going to take place of human beings.
Every coin has two side. Robort can be good to our society and life. At the same time,it also have some bad effect on our life.In my opinion, the advantages of robort are much more than the disadvantage of roborts.
First, roborts make our life more convenient. We can do many thing that we didn't have the ability to do in the past by using roborts.That makes our life more effective.
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Second, roborts can be used in industry produce. Factories can reduce the cost of prodution by using roborts. Roborts do not need to eat and they will not be ill. That's very good for producing goods.
Third,roborts can save more people when disaster happens. Because they can't feel pain and they can save more people without feeling tired.
In a word, the world is changing .We should also change our thought to accept roborts to become part of our life . That can make our life more colorful.
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