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- 1在三角形ABC中,若角A减去2倍的角B等于70,2倍的角C减去角B等于10那么角C是多少?要计算过程,答案是20度.
- 2在椭圆x^2/16+y^2/4=1内,求通过点M(1,1)且被这点平分的弦所在的直线方程要化简的全过
- 3一个长方体如果高缩短3厘米,就成了一个正方体.这时表面积比原来减少了48平方厘米,原来的长方体的体积是多少立方厘米?表面积是多少平方厘米?
- 4洛必达法则求极限 lim(x-0) ln(x+根号(1+x^2))
- 5这些英文简写的英文全称是什么
- 6would you like milk or coffee?_______.l'd just like a cup of tea.A.either B.neither .
- 7英语作文:假设你是李华,你的英国笔友JOHN写信告诉你近日他由于沉迷于电脑游戏健康受到很大影响,请你根
- 8给你下列器材:一个低压电池组,一只小灯泡,一只开关,一只电铃和若干细导线,请你设计一自动放养奶牛的装置图.要求:用导线将牛群围住,合上开关后,当牛在圈内吃草时,小屋内
- 9some birds are fiying in the sky there is a lake in the south of picture and two boats are on
- 10get married to 和 get married with有什么不同