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机械加工的基本时间是指直接改变生产对象的 、 表面相对位置、表面状态或材料性质等工艺过程的时间。[填空(1)] [填空(2)]
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【单选题】I can clearly remember the first time I met Mr. Andrews, my old headmaster,【21】that was over twenty years ago. During the war, I was at school in the north of England. As soon as it ended, my family r...
A.
if
B.
despite
C.
although
D.
since
【单选题】听力原文：W: Mr. Gordon, could you give the listeners some idea of how this launching campaign began? M: Well it all began more than a year ago, in the middle of an English winter, strangely enough. There ...
A.
Maderia was not chosen because its roads were too dangerous.
B.
The Costa Del Sol was finally chosen after three months of investigation.
C.
Britain was not chosen because it now was forecast for April.
D.
Portugal was not chosen because it was not quiet enough for the press.
【单选题】We all remember the days we studied together at school.
A.
which
B.
that
C.
when
D.
/
【简答题】The world is not only hungry but also thirsty for water. This may seem strange to you, since nearly 70% of the earth’s suce is covered with water. But about 97% of that is sea water or salt water. ...
【简答题】石英晶体的化学成分是 ,石英谐振器具有 效应和 效应,并且具有品质因数 、接入系数 等特点。
【简答题】One of my fondest Christmas memories was also one of our family’s bleakest（最令人沮丧的）.We were just little kids , and on Christmas Day mom 21 us all around her to tell us , 22 ,that there would be no ...
【简答题】When I was a boy, every holiday that I had seemed wonderful. My 16 took me by train or by car to a hotel by the 17 . All day, I seem to remember, I 18 on the sands with strange 19 children. We made ho...
【单选题】邓小平指出:"社会主义是共产主义第一阶段,当然这是一个很长的历史阶段。"特别是为了给实现共产主义准备充分的物质基础,就需要社会主义社会有( )过程。
A.
一个漫长的发展
B.
一个缓慢的发展
C.
一个长期的发展
D.
一个快速的发展
【简答题】第三节完形填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，从短文后各题所给的四个选项（A、Ｂ、Ｃ和Ｄ）中，选出可以填入空白处的最佳选项，并在答题卡上将该选项涂黑。 When I was a boy, every holiday that I had seemed wonderful. My 21 took me by train or by car to a hotel by the...
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