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- 1在平面直角坐标系中 o为坐标原点,已知向量OA=(2,2),向量OB=(4,1),在x轴上取一点P,使向量AP与向量BP的数量积有最小值,则P点的坐标是
- 2Could you tell me when America ()(discover)?Sorry,I don’t know ,either 动词填空.
- 31 2 3 4 5 =51 5 4 3 2 1 =51 空格中填符号
- 4what begins with "e" ends with "e" and has a letter in it
- 5英语翻译
- 6某实验小学今年招收新生200人,今年比去年曾加4分之1,去年招收一年级新生多少人
- 7We will have a ten___meeting in an hour.A.minute's B.minutes C.minutes D.minute
- 8一质点在X轴上运动,各个时刻的位置坐标如下表:
- 9我听见地球妈妈在哭泣
- 10已知x+y=4,x-y=6,化简xy(y2+y)-y2(xy+2x)-3xy,并求它的值.