风牵偏视保守治疗多长时间可行手术治疗？（）
A.2个月
B.4个月
C.6个月
D.10个月
E.12个月
参考答案：C
—Why should I correct it right now, Mum? It’s OK, I think.
— Well, Honey, it will _______ trouble in the future.
A．pass by
B．refer to
C．take up
D．lead to
什么叫注采平衡？
