题目

It is lucky we booked a room, or we ______nowhere to stay now. A . had B . had had C . would have D . would have had 答案：C已知△A1B1C1，△A2B2C2的周长相等，现有两个判断：①若A1B1=A2B2，A1C1=A2C2，则△A1B1C1≌△A2B2C2；②若∠A1=∠A2，∠B1=∠B2，则△A1B1C1≌△A2B2C2，对于上述的两个判断，下列说法正确的是（ ）A．①正确，②错误B．①错误，②正确C．①，②都错误D．①，②都正确