问题 多项选择题

根据《弧焊设备第12部分:焊接电缆耦合装置》(GB15579.12-2012)规定,下列关于耦合装置机械要求说法正确的是()。

A.止动装置或自锁紧装置应能防止耦合装置由于受轴向拉力而发生意外松脱

B.电缆耦合装置的电缆入口应设计成能防止电缆由于弯曲而损坏

C.电缆耦合器应设计成使电缆绝缘进入的深度至少是电缆外径的两倍,最少为30mm

D.耦合装置应设计成在制造商规定的截面积范围内的焊接电缆均可更换

答案

参考答案:A, B, C, D

完形填空

It is easy for some people to learn a second language. However, others have difficulty in learning a new language. What can you do to help yourself learn a second language, such as English?__小题1:__

1.Feel positive about learning English.__ 小题2:__Be patient. You do not have to understand everything all at once. It is natural to make mistakes when you learn something new. We can learn from our mistakes. In other words, do not worry about making mistakes.

2.Practice your English. For example, write a diary every day. You will form a habit of writing it in English, and you will feel comfortable expressing your ideas in English.__ 小题3:__ In addition, you must speak English every day. You can practice with your classmates outside class.

3.__小题4:_You can write this in your journal. After each class, think about what you did. Did you answer a question correctly? Did you understand something the teacher explained? Perhaps the lesson was difficult, but you tried to understand it.

You must be positive about learning English and believe that you can do it. It is important to practice every day and make a record of your achievements.__ 小题5:__

A.Go over the points you have learned.

B.Keep a record of your language learning.

C.Don't give up when you meet some difficulty.

D.If you believe that you can learn, you will learn.E. Several weeks later, you will see that your writing is improving.

F. In these ways, you will enjoy learning English, and you will feel more confident in yourself.

G. There are several ways to make learning English a little easier and more interesting.

单项选择题