正确答案:
99. New theories propose that catastrophic impacts of asteroids and comets may have caused reversals in the Earth’s magnetic field, the onset of ice ages, the splitting apart of continents80 million years ago, and great volcanic eruptions
平行结构,有的加定冠词,有的不加,why?因为加了的那些是特指的?
举报
冠词我一向头晕
好像是复数前可不用定冠词.召唤NN们啊!
zero article
http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv198.shtml
When we are discussing things in general, we normally use zero article with plural and uncountable nouns:
But note, when we want to be specific:
There are a number of common fixed expressions used with certain prepositions involving everyday time and place nouns where zero article is required:
我狂错
http://www.englishlab.net/articles1_mixed.htm
http://www.englishlab.net/articles2_mixed.htm
http://www.englishlab.net/articles1propernouns.htm
不理解为什么onset前面也有the啊!
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