剑桥雅思5里一道题的疑惑
剑五 TEXT3 PASSAGE2 那篇disappearing delta 第21题 原文写的是"...indicated that the river sometimes carries .——almost half of what it carried before the dams were built" 题目是Stanley found that the levels of sediment in the river water in Cairo were relatively high 答案是T它不是写的是 half of..么? 那不是少了么...这个题我一直没看懂 求教