【单选题】已知两点A(-2,0),B(0,2),点C是圆x 2 +y 2 -4x+4y+6=0上任意一点,则△ABC面积的最小值是( )
【单选题】已知两点 A(2,0),B(0,4)则AB的中点坐标为
【单选题】已知空间两点A(4,a,-b),B(a,a,2),则向量 AB =( )
【简答题】阅读理解。 Wei Hua had a busy day yesterday. She got up before 7 o'clock in the morning, and quickly washed her hands and face. She got to school early. She had a little rest after lunch, but worked hard i...
【单选题】已知两点A(2,0),B(0,4),且∠1=∠2,则点C的坐标为 [ ]
【单选题】目前公认较好反映左室功能的指标是 ( )
【简答题】听短文填空。 A__ 1 __ usually eat three meals a day. B__ 2 __ usually c__ 3_ _ before eight o'clock in the m__ 4 __. They usually have eggs, some meat, bread, fruit juice and coffee. Lunch is between t__ 5 ...
【单选题】已知两点A(0,-3),B(4,0),若点P是圆x 2 +y 2 -2y=0上的动点,则△ABP面积的最小值为( )