问题
单项选择题
( )是形成机床切削速度或消耗主要动力的工作运动。
A．主运动
B．从运动
C．旋转运动
D．直线运动
答案
参考答案：A
解析： 主运动是形成机床切削速度或消耗主要动力的工作运动。如车削工件时，工件的旋转；钻削、铣削和磨削时刀具的旋转；牛头刨床刨削时刀具的直线运动。
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( )是形成机床切削速度或消耗主要动力的工作运动。
A．主运动
B．从运动
C．旋转运动
D．直线运动
参考答案：A
解析： 主运动是形成机床切削速度或消耗主要动力的工作运动。如车削工件时，工件的旋转；钻削、铣削和磨削时刀具的旋转；牛头刨床刨削时刀具的直线运动。
A couple were having a wedding All of their friends and family came to see the lovely 1 and all had a wonderful time. The bride was 2 in her white wedding gown and the groom was very handsome .Everyone could tell that the 3 they had for each other was true A few months later ,the wife came to the husband with a 4 ,“Each of us will write a list of things we find a bit 5 with the other person ,Then ,we can tale about how we can 6 them and make our lives happier”The husband 7 ,So they went to think of the things that annoyed them about the other The next morning ,at the breakfast table ,they decided they would go over their 8 “I’ll start ”said the wife ,She 9 her list , It had many items on it ,enough to fill three pages , As she started reading the list of the little annoyances ,she noticed 10 were starting to appear in her husband’s eyes. “What’s wrong?”she asked “Nothing,”the husband replied ,“11 reading your list,” The wife continued to read until she had read all three 12 to her hushand. “Now, It’s your 13 and then we’ll talk about the things on both of our lists,”she said happily 14 the husband stated，“I don’t have anything on my list , I shink you are 15 the way that you are , I don’t want you to change anything for me , I wouldn’t want to try and 16 anything about you.” The wife , 17 by his honesty and the depth of his love for her and his 18 of her,turned her head and wept. In lire, there are enough times when we are disappointed. Depressed and annoyed , We don’t really have to go 19 them. We have a wonderful world that is rull of beauty ,light and promist Ehy not see the 20 things before us?
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