故宫博物院最初悬挂的匾额是谁题写的？目前悬挂的匾额是谁题写的？
参考答案：李石曾；郭沫若。
圆x2+y2﹣4x+4y+6=0截直线x﹣y﹣5=0所得的弦长为（ ）
The poor little boy longed for a pretty toy train,______ his father could never afford.
A．that
B．the one
C．one
D．it .
