题目选项分析

The human nervous system bears a superficial resemblance to a telephone system both because the former carries information in the form of electrical impulses and because all of its neural pathways converge in the brain and spinal cord, which together form a kind of central exchange.

The human nervous system and a telephone system bear a superficial resemblance because they both carry information in the form of electrical impulses and because all of its neural pathways converge in the brain and spinal cord, which together form a kind of central exchange.