问题
问答题 简答题
变速机振动的原因有哪些？
答案
参考答案：
①变速机对中不良；②齿轮箱体联接螺栓松动；③箱体内联接组件松动，导致配合精度降低；④转子不平衡⑤齿轮啮合不良；⑥轴承间隙过大或损坏。
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变速机振动的原因有哪些？
参考答案：
①变速机对中不良；②齿轮箱体联接螺栓松动；③箱体内联接组件松动，导致配合精度降低；④转子不平衡⑤齿轮啮合不良；⑥轴承间隙过大或损坏。
As Grade 9 students,we are busy studying for the coming entrance exam.Every day we have lots of exercises to do and many ___to take .Some of us feel upset,and some even lose heart.But we’ll not help ___if we lose heart. There’s a saying ,”Difficulty is like a spring(弹簧).If you are weak,it will be ____.”If we have a problem we should face it__ a smile.Once I____ a short story called The Smile. In this book,he _____his experiences as a soldier in World War II. He _by enemy and sent to jail.(监狱)But he tried to think of ways to run away._ __he wanted to smoke ,but he had no match. So he asked his jailor for a __.When the jailor came up to him ,he smiled ______and naturally.The jailor seemed to be affected and smile,too.Then they began to talk. They ___took out pictures of their families and showed them to each other.The soldier said sadly he would never see his ___again because he was to be killed .He would never have a chance to see his children grow up.The jailor was moved by the soldier’s words.___ ___saying a word ,he unlocked the cell and quickly let him go .__ __ a smile ,the soldier was saved. Even in a terrible solution the man was optimistic .He didn’t____.Surely we can do the same.Life is like a mirror,if you smile at it,it will smile back at you,too.
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