问题
问答题 简答题
变压器的硅钢片交错叠装和铁芯柱做成阶梯式的目的是什么？
答案
参考答案：
变压器铁芯是主磁通的主要路径，要求磁阻越小越好，所以硅钢片交错叠装，相邻层的接缝错开，这样减少了对磁力线的不良影响，同时也增加铁芯柱和铁辄之间的机械强度。
铁芯柱所以做成阶梯形式的目的是尽量使铁芯横截面接近圆形，以利于套装线圈。
搜题请搜索小程序“爱下问搜题”
变压器的硅钢片交错叠装和铁芯柱做成阶梯式的目的是什么？
参考答案：
变压器铁芯是主磁通的主要路径，要求磁阻越小越好，所以硅钢片交错叠装，相邻层的接缝错开，这样减少了对磁力线的不良影响，同时也增加铁芯柱和铁辄之间的机械强度。
铁芯柱所以做成阶梯形式的目的是尽量使铁芯横截面接近圆形，以利于套装线圈。
| 根据短文内容，从下框A-F选项中选出能概括每段主题的最佳选项。选项中有一项为多余项。 | |
| |
| 1._____ As awareness of the benefits of humour increases, most of us want to get all the laughs we can. It seems that almost every day there is another new discovery about the power of humour to help us physically, mentally, emotionally, and spiritually. Every system of the body responds to laughter in some important or positive way. 2._____ Many people mistakenly believe that we are born with a sense of humour. They think that when it comes to a sense of humour. "either you have got it or you don't." This is false! What is true, however, is that the ability to laugh and smile is actually something we are born with. For example, we laugh when we are tickled under the arm, even without thinking about how to react. 3._____ The parts of the brain and central nervous system that control laughing and smiling are mature at birth in human infants, but that is not the same thing as having a sense of humour. (After all, when a baby laughs in his small bed we don't rush over and say, "That kid has a great sense of humour!") Your sense of humour is something you can develop over a lifetime. Don't be nervous before others and try to laugh at yourself-then you will make them laugh too. 4._____ Humour includes a lot more than laughing and joke telling. Many people worry needlessly that they do not have a good sense of humour because they are not good joke tellers. More than jokes, a sense of humour requires being willing and able to see the funny side of life's situations as they happen. In fact, one of the best definitions (定义) of a sense of humour is "the ability to see the nonserious element in a situation." 5._____ There may be a thousand different ways to express your sense of humour, but joke telling is only one of those ways. As more is discovered about how humour benefits our life, more people will be able to see and enjoy the humour when they are in a difficult situation. Life depends on air, food and water, but it is made easier to live with a good sense of humour. |