— ____________ is your favourite food?
— Pizza.[ ]
A. Who
B. What
C. How
D. Which
答案:B
最佳治疗方案
A.皮牵引,止痛,化疗
B.单纯化疗
C.单纯放疗
D.瘤段切除,假体置入
E.瘤段切除,假体置入,化疗
若x=2是方程9﹣2x=ax﹣3的解,则a=( ).