（），标志着细胞分裂后期的开始。
参考答案：有丝分裂中姊妹染色体分离并向两极运动
The committee is discussing the problem right now. It will ______ have been solved by the end of next week.
A．eagerly
B．hopefully
C．immediately
D．gradually
鼻咽癌放疗靶区范围一般包括（）
A.全部鼻咽壁
B.咽旁、后间隙
C.上颌窦腔的后1／3
D.喉咽
E.蝶窦、蝶骨体
