问题 问答题 简答题

1.机器与机构的区别是什么?

2.机器的生产过程包括哪些内容?

答案

参考答案:

1.机器与机构的区别在于:机器能实现能量的转换(如内燃机、发电机和电动机)或代替人的劳动去做有用的机械功(如起重机、机床),而机构则没有这种功能。仅从结构和运动的观点看,机器与机构并无区别,为了叙述方便,通常用"机械"一词作为机器与机构的统称。

2.机器的生产过程是指将原材料转变为成品的全部过程。结构比较复杂的机械产品,其生产过程主要包括:

(1)各种生产服务过程。包括原材料和半成品的供应、运输和保管、产品的包装和发运等。

(2)生产技术准备过程。指产品投入生产前的各项生产和技术准备工作,如产品的试验研究和设计,工艺设计和专用工装设备的设计与制造;各种生产资料的准备以及生产组织方面的工作。

(3)毛坯制造过程。如铸造、锻造、冲压、切割下料、焊接等。

(4)零件的加工过程。如机械加工、焊接、热处理和其他表面处理等。

(5)产品的装配过程。包括部件装配和总装配,调试、检验和油漆等。

完形填空
根据短文内容,从各题所给的A、B、C、D四个选项中选出最佳选项。
It was two days before Christmas, when my ten-year-old Almie Rose told her father and me that she wanted a new bike.  Her bike was too   16  , and it needed repairing as well.
As Christmas   17  ,  her dream for a bike seemed to disappear, we thought, for she didn’t say it again. We were busy   18  some beautiful story books, a doll house, a holiday dress and toys. Then to our surprise, on December 24, she said she really wanted a bike more than   19  .
Now we didn’t know   20  to do. It was just too late. We were busy with Christmas dinner and packing   21  presents, parents’ presents, a brother’s present and friends’ presents till midnight. So there was   22  time to take to buy the "right hike" for our little girl. Thinking we were parents who would make their child unhappy, we felt sorry and   23  .
Suddenly my husband had an idea. "What about making a little bike with clay (mi) and writing a note that she could trade in (交换) the model bike for a real one?" So he spent the next five hours carefully   24  with clay to make a small bike.
25  Christmas morning, we were so excited for Almie Rose to open the little box with the beautiful red and white clay bike and the note. She opened and read the   26  loudly. She looked at me and said, "So, does this mean I can trade in this bike for a real   27   ?" Smiling, I said, "Yes!" Almie Rose had tears in her eyes when she replied, "I would   28  trade in this beautiful bike   29  Daddy made me. I   30  keep it than get a real bike. This is the best Christmas present I have ever got in my life!"
小题1:
A.newB.oldC.beautifulD.modern
小题2:
A.came nearerB.was overC.went byD.passed
小题3:
A.buyB.boughtC.to buyD.buying
小题4:
A.something else B.anything elseC.else somethingD.else anything
小题5:
A.whatB.howC.whyD.where
小题6:
A.childrenB.children’sC.boyD.girls
小题7:
A.enoughB.noC.muchD.still a little
小题8:
A.happyB.excitedC.sadD.angry
小题9:
A.worksB.workedC.workingD.to work
小题10:
A.InB.OnC.AtD.For
小题11:
A.bookB.storyC.noteD.newspaper
小题12:
A.oneB.onesC.someD.any
小题13:
A.usuallyB.certainlyC.neverD.of course
小题14:
A.whoB.thoseC.whatD.that
小题15:
A.am going toB.would like toC.had betterD.would rather
单项选择题