关于it指代的问题

mathilde_111 · 发表于 2013-9-18 23:59:54

题目是verbal官方指南xdf的，2nd edition。 SC 105题
The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; (infrared radiation, however, is invisible because its wavelength--0.1 millimeters-- is too long to be registered by the eye.)
C. infrared radiation, however, is invisible because its wavelength-0.1 millimeters-is too long for the eye to register it.

C的答案是不对的，解释是“ it lacks a clear referent”
但是我看不出来为什么
谢谢解释~

[SC悬赏令] 关于it指代的问题

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