题目解析:
教授在介绍了山魈被观测到最多可以800只组成群体移动之后,问道: “能想象的出来吗? ”可见,他认为这一规模非常之大。因此正确答案选B。
【对应原文】
Today, we're going to focus on the mandrill...the most colorful monkey-or rather, it's not truly a monkey anymore...it's been classified as its own genus, mandrillus-but yes, the most colorful of primates...the mandrill. They are social creatures and have been observed by scientists to live and travel in packs of, uh, up to eight hundred individuals! Can you imagine it? Normally though, it's anywhere between twenty and two hundred.