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操场
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- 1奥运会旗的图案是五个相套的圆环,即奥林匹克环,其中,蓝色代表( ),黄色代
- 2my friend___ his pen and my sister helped him___ it
- 3We have some heavy rain today.划线提问
- 4新运算符号*的运算过程为a*b=2分之1a-3分之1b,则解方程2*(2*x)1*x
- 5已知点A(0,6),圆C:x^2+y^2+10x+10y=0求:(1)过点A且与圆C相切于原点O的圆D的方程
- 6we all know that one dollar is()cents a.one hundred b .a hundred c .hundred d.hundreds
- 7用导数求函数单调区间
- 8Bob likes _____TV and _____ football.与 Bob likes ___football and ___basketball.
- 9It is so a beautiful place.错了改正
- 10一辆快车和一辆慢车由甲、乙两地同时相向而行,两车速度比3:2慢车行完全程16.5小时,两车出发后几小时相