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- 1(1)y=x^2-(m-4)x+2m-3,当m=?时,图象的顶点在Y轴上;当m=?时,图象顶点在X轴上;当m=?时,图象过原点.(2)用一根长度为L米的铁丝围成一个长方形或正方形,则其所围成的长的最大面积为?.(3)求2次函数的最值:(1)
- 2在平面直角坐标系中,已知动点M到两定点F1(-1,0)和F2(1,0)的距离之和为2√2,且点M的轨迹与直线l:2y=x+1交于A、B两点.
- 3I like···造句
- 4All I could do was to wait.So that's that
- 5They got to a wonderful hotel at about 21:00 yesterday.(同义句转换)
- 6He asks us to study hard 可以说to study hard整个做宾语补足语吗如果分得详细的话可以这样分吗
- 7what do you suppose _______to him?为什么是has happened不是to happen?
- 8also怎么读,用汉语注明
- 9Can you attend the party tomorrow, Tom? I can when my headache ___completely
- 10去睡觉/坐这儿/一位中国工人(英文翻译