标题: OG12-23求助 [打印本页] 作者: 幸运E枪兵 时间: 2012-2-26 14:49 标题: OG12-23求助 In a previous design,the weight of the discus used in track competition is concentrated in a metalcenter, but now it is lined with lead around the perimeter, thereby improving stability inflight and resulting in longer throws. A. In a previous design, the weight of the discus used in track competitionis concentrated in a metal center, but now it is B. According to a previous design, the weight of the discus used in trackcompetition was concentrated in a metal center, but now it is C. Once designed with its weight concentrated in a metal center, the discusused in track competition is now D. The discus used in trackcompetition, once designed with its weight concentrated in a metal center, butnow (C) E. The discus used in track competition was once designed having its weightconcentrated in a metal center and now 答案选a. 我想知道为什么it在这里不能指代weight of the discus？作者: 幸运E枪兵 时间: 2012-2-26 23:15
up~~~作者: 幸运E枪兵 时间: 2012-2-27 12:04
up~~~作者: anyany024 时间: 2012-2-27 13:08
显然不能，it指代的一个常用logical判断是把指代对象带回it看看句子逻辑上是否合理