伤口一期愈合的时间为:()
A.3~5天
B.5~7天
C.7~9天
D.9~11天
E.11~13天
参考答案:B
Mr Smith is at the door. _______ wants to see you.
A.He
B.It
C.This
D.That
鼻状构造:平面上其()等高线成()曲线。