. There is no doubt that being good at communicating is a great_________, especially when you are looking for a job.

A．advantage

B．privilege

C．assistant

D．opportunity

关于受精的叙述，下列哪项正确

A．卵子停留在输卵管峡部等待受精

B．精子获能的主要部位是 * *

C．精子与卵子相遇时发生顶体反应

D．精子与卵子相遇，标志受精过程已开始

E．精原核与卵原核相融合，标志受精过程即将完成