24.Because of their rapidly changing economically fortunes, many frontier towns of the American West underwent spectacular fluctuations in population in the nineteenth century.
B改为economical,那个rapidly changing economical fortunes是一个怎样的结构？？
adv.+adj.+n.
28.The technique of spectroscopy allows analyst of incoming light after it has been separated into its component wavelengths by passage through a prism
我选了D，我认为应该改为by passing,但是答案却是A,是不是答案错了？？
这里如果是analyst(人），会有歧义，应该改为分析analysis
另外analyst of incoming light也讲不通呀？
copy翻译给你：光谱分析技术使得分析光的组成成为可能， 当光通过棱住折射的时候， 分出自己的波长， 显示出成分。
29.Today ,fifty years after its construction ,the Alaska Highway conveys 40,000 vehicles in normal year
答案选D，怎样改？为什么？
year可数，所以不是in a normal year,就是in normal years
34.European settlers in North America moved from the Atlantic coast across 3,000 miles forests, grasslands, deserts, and mountains until they reached the Pacific Ocean.
答案选c,是不是应该改为mile,这一类在具体数字后面不加S的，是为什么？我看过有些题例如，one half percentages,40 percentages,这些后面都加S的，有什么不同？
应该是miles of forests, n.和n.放在一起必错，中间一定要加of
百分比结构
X percent/most of + n.，谓语动词的形式和百分比多少没有关系，主要取决于后面的名词 | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2005-7-21 15:04:00
楼主
