Glaciers may form in permanently cold areas, and these slowly moving masses of ice cut out valleys, carrying with them
huge quantities of eroded rock debris.
答案说them 是指, masses of ice, 不是很理解,为什么呢?:)
Glaciers may form in permanently cold areas, and these slowly moving masses of ice cut out valleys, carrying with them
huge quantities of eroded rock debris.
答案说them 是指, masses of ice, 不是很 ...
云鬓香 发表于 2011-11-1 01:39