直肠中下1／3肿瘤行AR术时应遵循全直肠系膜切除TME原则。
参考答案：对
The audience were ________ by his _______ performance on the stage.
A. amused; amused B. amused; amusing C. amusing; amused
原子核由下列哪些粒子构成
A．质子
B．中子
C．核外负电子
D．核外正电子
E．光子磁共振成像(MRI)
