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状态: 当前离线
Michelangelo
Many times,the small things in life, which we often ignore, are more important than the ones that we consider far more valuable.
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 第一道题做出得e=  ，第二题化出来  如何求最值，请教一下。[ 本帖最后由 Michelangelo 于 2008-10-7 22:11 ...
为什么点电荷与带电平板的电场线终止于导体表面的电场线一定与导体表面垂直？
二次函数f(x)=ax²+bx+c，已知|f(0)|≤1,|f(1)|≤1,|f(-1)|≤1，求证：|x|≤1时，|f(x)|≤5/4.
 （填入1——9）使等式成立。
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【活动】英语词组接龙 就要玩出花样！