声门上区癌T1N0M0的治疗手段选用()
A.单纯手术
B.单纯放疗
C.放疗+手术
D.手术+放疗
E.放疗+化疗+手术
参考答案：C
The lead singer was ill and couldn't sing that night, and her ________ didn't perform well, which made the audience disappointed.[ ]
A．agent
B．attitude
C．substitute
D．institute
带电作业工具应如何登记？
