自体软骨如移植需材较多时，多取自_____侧第_____肋软骨互相连接的部位。如需少量软骨骨片则可取自______。
参考答案：右；6、7、8、9；耳廓
While she_____ on the phone, a man walked into her room.
A．is talking
B．talked
C．was talking
D．talk
细胞信号转导
