问题 问答题 简答题

铆接的强度与哪些因素有关?

答案

参考答案:

(1)与铆钉直径和数量有关。在一定条件下,铆钉直径越大,数量越多,强度也就越大,反之就越小。

(2)与铆钉长度和铆接件总厚度有关。铆接件越厚,铆钉越长,铆接强度越低。

(3)铆钉孔的大小和多少也直接影响铆接强度。铆接件车身开孔越多越大,强度就越低。

(4)铆接强度与铆接形式有关。对接时,双盖板要比单盖板的强度提高一倍。

阅读理解

阅读理解。

     As we know, there are differences between western culture and Chinese culture. We can see differences

when we pay attention to the words are used. Let's look at the words about animals and plants. Most

expressions in Chinese about the dog, for example,"a homeless dog","a mad dog","a running dog" and "a dog

catching a mouse", have negative (消极的) meanings. But in western countries, dogs are thought to be honest

and good friends of humans. In English, people use the dog to describe positive (积极的) actions. For example,"you are a lucky dog" means you are a lucky person. And "every dog has its day" means each person has good

luck sometimes. To describe a person's serious illness, they say "sick as a dog". The word "dog-tired" means

very tired. However, Chinese love cats very much. But in western culture,"cat" is often used to describe a

woman who is cruel (冷酷的). There are many other examples of how "cat" is used differently as well.

    The rose is regarded as a symbol (象征) of love in both China and some western countries. People think

the rose stands for (代表) love, peace (和平), courage and friendship. And the rose is the national flower of

England, America and many other countries.

    The words about plants and animals are used in positive or negative ways in different cultures. We can

learn about many differences in cultures by comparing how some words are used.

1.  判断正误(“T”表示正确,“F”表示错误)。

     ( ) The word "dog" in Chinese usually has a negative meaning.

2. What does "Every dog has its day.", mean? 

   ____________________________________________________________

3. What do western people usually use "cat" to refer to (指代)?

   ____________________________________________________________

4. What's the best title (标题) for the passage?

    ___________________________________________________________

5. Put the underlined sentence in the passage into Chinese.

    ___________________________________________________________

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