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- 1∠abc的∠b的外角的平行线bd与∠c的外角的平分线ce相交于点p,求证:点p到三角形ab,bc,ca的距离相等吗
- 2奖品盒是长30cm,宽15cm,高10cm的长方体,四周用一根金丝捆扎,接头处长25cm,捆扎这个奖品盒需多长金丝?
- 3The harder you work,the better grades you will get.
- 417课少年闰土课后习题
- 5以“难题”为题目,写作文
- 6一道找规律题
- 7wish you merry christmas!a.thank you.b.the same to you c.the same with you d.that's fune
- 8观察下列各式:一乘二分之一=一减二分之一
- 9I can think of many cases ______students obviously
- 10用函数的导数证明不等式 sinx<x