题目

---How many chapters does the book have? ---It ____ three chapters. A．consists with                               B．consists of C．including                              D．is contained 答案：B二次函数y=-x2+1的图象与x轴交于A，B两点，与y轴相交于点C．下列说法中，错误的是（ ）A．△ABC是等腰三角形B．点C的坐标是（0，1）C．AB的长为2D．y随x的增大而减小