问题 问答题 简答题

模架装配后应达到哪些技术要求?

答案

参考答案:

(1)组成模架的各零件必须符合相应的标准和技术要求,导柱和导套的配合应符合相应的要求。

(2)装配成套的模架,上模座上平面对下模座下平面的平行度、导柱的轴线对下模座下平面的垂直度和导套孔的轴线对上模座上平面的垂直度应符合相应的要求。

(3)装配后的模架,上模座在导柱上滑动应平稳和无阻滞现象。

(4)模架的工作表面不应有碰伤、凹痕及其他机械损伤。

单项选择题
阅读理解

Englishmen speak British English and Americans speak American English. A student is learning to speak British English. He often asks himself, “Can Americans understand me when I speak British English?” Learners often ask “What’s the difference between British English and American English?”Certainly there are some differences between British and American English. The Englishmen say “Have you a pen?” While Americans say “Do you have a pen?” The pronunciation is sometimes different. Americans often sound “r” in words like “bird” and “hurt”. The British speakers don’t sound the “r” in these words. There are differences in spelling. For example, “colour” and “neighbour” are British while “color” and “neighbor” are American. These differences in grammar, pronunciation and spelling are not important, however. For the most part, British and American English are the same language. When Englishmen and Americans are talking with each other, they don’t need an interpreter(翻译). Maybe some day they need, but not now.

小题1:Between British and American English, _______.

A.the greatest difference is in spelling

B.there are differences in many ways

C.people can’t understand each other

D.students don’t know the difference小题2:When a student is asking himself “Can Americans understand me when I speak British English?” it shows that_______.

A.he wants to learn American English

B.he doesn’t like British English

C.he hasn’t spoken to any American so far

D.he is going to spend more time on American English小题3:43. The differences between British and American English are not important because______

A.everyone knows the differences   

B.people talk to each other very often

C.Englishmen and Americans get along well

D.British English and American English are the same language小题4:“Have you a pen” and “Do you have a pen?” show a difference in______

A.grammar

B.spelling

C.pronunciation

D.listening小题5:At the end of the passage the writer wants to tell us _______.

A.British and American English will be two different languages some day

B.Englishmen and Americans will never need an interpreter while talking

C.there will be no more differences between British and American English

D.the differences between British English and American English will grow larger