冈崎片段
参考答案：
在DNA复制叉中，后随链上合成的DNA不连续小片段称为冈崎片段。
— How did you find your sister in such a big and strange city?
— I ____ her in the railway station when I was looking for the police for help. [ ]
A. came about
B. came out
C. came up
D. came across
某单位职工在调出15名女职工后，男女职工比例为2：1，若再调出45名男职工后，男女职工比例变为1：5，则原有男职工（）人。
A．66
B．60
C．56
D．50
