红细胞增多症的治疗首选（）。
A.血液稀释疗法
B.静脉放血
C.BFU－E抑制因子
D.32P化疗
E.干扰素治疗
参考答案：B
Desipt the fact that there was a big ______ over the meeting, it seemed that a good many of the invited guests would still attend it.
A．controversy
B．comparison
C．agreement
D．contribution
