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- 4Sometimes I draw pictures(改为同义句)
- 5函数f(x)=ax-3x²/2的最大值不大于六分之一,且当x∈【1/4,1/2】时,f(x)≥1/8,求实数a
- 6已知甲,乙两数的比是3比8,甲数比乙数少18,甲乙两数的和是多少?
- 7_______ our classroom once a week is necessary A.Cleaning B.Clean C.Cleaned D.To clean 我觉得是A
- 8有2分和5分的硬币共有46枚共有1元4角9分,这两种面值的硬币各是几枚
- 9用be made up for,be made of,be made from,be made into,be made in,be used to sth和be used doing sth7
- 10关于x的方程(3m2+1)x2+2mx-1=0的一个根是1,则m的值是( ) A.0 B.-23 C.23 D.0或−23,