8. According to paragraph 5,Lake Erie's residence time is lower than Lake Ontario's for which of thefollowing reasons? A. Lake Erie has a larger area than Lake Ontario. B. Lake Ontario is shallower than Lake Erie. C. Lake Ontario has a greater volume than Lake Erie. D. Lake Erie receives less rainfall than Lake Ontario. 这道题，虽然A选项是符合文章的意思，但是并没有回答题干的问题。因为它并不是导致E湖比O湖 r time 短的原因。 C才是。
11. According to paragraph 6,which of the following explains the increase in residence northwestern Ontario? A. The amount of water flowing into the lakes has increased. B. The rate of evaporation has decreased more sharply than the amount ofrainfall. C. The renewal of the lakes' water has slowed dueto changes in climate. D. Plants have required less water from the lakes. 这道题不是很明白，AB肯定都不对，C选项与文章对应的地方是： “The result has been that the residence timeof one of the lakes increased from 5 to 18 years during the study period. The slowing down of water renewal leads to a chain offurther consequences; it causesdissolved chemicals to become increasinglyconcentrated, and this, in turn, has a marked effect on all living things inthe lake.” 没觉得这是解释residence time 增加的原因啊，感觉 renew water .. 写到一半明白了，是自己读题不仔细啊！！！眼睛吃面条去了~~！
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发表于 2012-11-30 02:35:49
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