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- 15分之2公顷的4分之3是多少公顷
- 2you have been playing golf since you were 16 years old
- 3某校六(1)班四分之一的同学参加 跳绳比赛十五分之三的同学参加跑步比赛,十六分之四的同学参加跳远比赛
- 4仿写《从百草园到三味书屋》第二段
- 5句子翻译that's only one way of doing it,but there are other and better ways
- 6已知锐角αβ满足cosα=3/5,cos(α+β)=-5/13,则cosβ=?
- 7菱形是不是中心对称图形?
- 8设二次函数y=x2+bx+c,当x≤1时,总有y≥0,当1≤x≤3时,总有y≤0,那么c的取值范围是_.
- 9一个工人用100N的力把160N的木箱从长为6m斜面低端沿斜面推至3米高处,求机械效率.和木箱与斜面间的摩擦力
- 10every day may not be good,but there's something good in every day.怎么翻译.