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- 1世界上第一个将圆周率精确到3.1415926和3.1415927之间的数学家是_国的_．
- 2一个圆心角为120度的扇形面积是20平方分米,与它半径相等的圆的面积是多少?
- 3I'm sure the 2012 Olympic Games will be held in London,____?
- 4己知抛物线y=ax+6x-8与直线y=-3x相交于点A(1,m).1)求抛物的函数解析式;(2)请问中的抛物线经过怎样的平移就
- 5My parents are both and their students all love them very much 怎么翻译
- 6英语翻译
- 7两只标有220v 40w的灯泡串联接入家庭电路中,则电路消耗的总功率是多少.
- 8请问怎样平移二次函数?例如,y=-4x的平方+8x-3怎么平移为y=-4x的平方?
- 9what is the longest running race in the Olympic games?
- 10设f(X)在(-∞,+∞)上存在二阶导数,且f(0)0,证明f(X)至少一个实根至多两个实根.