肛瘘在肛管直肠环上方的主管或通过直肠环上2/3的主管，采用（）
参考答案：主灶切开加挂线引流术
---–Why did you come so late for work?
-----I was ________ for 15 minutes on the way here in the traffic jam.
A．held up
B．put up
C．taken up
D．given up
简述小区种植鉴定的目的和作用。
