[解析]
(1)细节理解题。根据第一段But the problem is:how to know who's who?(但问题是:如何知道谁是谁?)可知,科学家在研究猴子的时候,面临的问题是如何区分猴子。故选B。
(2)细节理解题。根据第五段中When the system is fully developed,we can connect it with cameras set up in the mountains.(当这个系统完全开发好后,我们可以将其与安装在山上的摄像头连接起来。)可知,这个系统开发后需要与摄像头连接起来使用。故选A。
(3)词句猜测题。根据第七段中画线短语前面的"Compared with facial recognition technology for humans,facial recognition technology for monkeys is more complicated because monkeys have hairier faces.The color of their hair causes them to blend into their environment.(与人类面部识别技术相比,猴子的面部识别技术更复杂,因为猴子的脸更多毛。它们的毛发颜色会使它们融入环境。)可知,These factors指的是有毛的脸和毛发颜色这两种因素。故选C。
(4)主旨大意题。通读全文,尤其是第三段A research team from China's Northwest University is using facial recognition technology to identify thousands of snub﹣nosed monkeys (金丝猴) that live on Qinling Mountain in Shaanxi province.(中国西北大学的一个研究小组正在使用面部识别技术来识别生活在陕西秦岭上的数千只金丝猴。)可知,本文主要讲述了科学家使用面部识别技术来识别和区分陕西秦岭里的数千只金丝猴。故选B。