题目

如果直线ax + by – 4 = 0与圆C：x2 + y2 = 4有2个不同的交点， 那么点P(a,b)与圆C的位置关系是 A．在圆外      B．在圆上      C．在圆内       D．不确定 答案：A  解析:由条件，得，即a2 + b2 > 4．句型转换。1. They help plan the school leavers' party.(不改变原意)    They help plan the school_________ _________ .2. We intend to study abroad after graduation. (不改变原意)    We intend_________ in_________ countries after graduation.3. I decided to decorate my room. (不改变原意)     I _________ _________ _________ ________to decorate my room.    I_________ _________ ________to decorate my room.4. He has got ready for the final exam. (不改变原意)     He has_________ _________ the final exam.5. Will you continue your study after graduation? (不改变原意)     Will you_________ _________ _________ your study after graduation?