OG205_ them的指代

ustoday

OG 205
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

crests and troughs that remain stationary although the air that forms them is moving rapidly, are
crests and troughs that remain stationary although they are formed by rapidly moving air, are
crests and troughs that remain stationary although the air that forms them is moving rapidly, is
stationary crests and troughs although the air that forms them is moving rapidly, are
stationary crests and troughs although they are formed by rapidly moving air, is  (C)

不好意思 問了一個蠢問題 但是我真的不知道句中兩個Them是代表什麼意思

還有 因為中間有";" 連接兩個獨立子句 那兩個獨立子句的代名詞可以指代不同東西媽 (例如這題)
感謝NN回答

sunforest

First 'them 'stands for rocks, second 'them' refers to crests and troughs. That is only my personal point.

2nd Quetion: yes

ustoday

其實我是認為第一個Them 應該是指peaks

有沒有別的NN知道答案

很謝謝sunforest這麼快給答案

foreverlovett

先回答作者的问题,我觉得这题中的THEM 应该指代crests and troughs that remain stationary

这样旧可以解释后文中的MOVING  RAPIDLY与STATIONARY形成的对比,知道我的表达是否清楚明白

但是我的问题是,此题为什么不能选E呢??

ESeraph

E中形成了with...although...,是不对的,although没有对应了,而C中with... that...although...是可以的

jjll

是不是可以这么说：介词后最好只跟名词，如果跟复杂结构，不如用从句？