Today i make careless mouse mistake Today is my second work day,when i use the mouse then it is not well.I thought it is broken,i carefully fixed it,but nut find what is it angthing problem. I thought carefully,oh my god ·······This is my careless until it is broken ,because when i were put it accidentally fell down on the floor after work i in yesterday . The thing is tell me ,whereever i have do everything i should be carefully and i must learn to sum up experience.