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- 1有5个数的平均数是7.2,前三个数的平均数是7,后3个数的平均数是9,中间一个数是多少?
- 2i had much homework last night, so I went to bed _____
- 3今有鸡,兔共35个头,脚共有94只,求鸡兔各有多少只
- 4对于代数式1/2a的平方-a+b=0时,其值是1,那么a=2时,其值是()
- 5求英语作文!
- 6草酸的化学式是什么啊?
- 7求下列函数的导数dy/dx
- 8-would you like green tea_____juice?-i don't li
- 9马铃薯在不同液体中的沉浮的秘密是什么?
- 10work hard work will save you ,work is the only think that will see you through this