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- 1若一元二次方程(k-1)x的平方-(2k+3)-x+k+1=0有实根,求k范围
- 2两个工作队,第一队有146人,第二队有88人,从第一队调几个人到第二队,才能使两队人数相等?
- 3在梯形ABCD中,AD‖BC,DE平分角ADC交AB于E,且AE=EB.求证:CD=AD+BC
- 4he like playing basketball very much.he___ ___ ___playing basketball.
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- 8电阻R1=8欧姆,R2=2欧姆并联在电路中,欲使这两个电阻消耗的电功率相等,可行的办法是?
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