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2．We can't livewithout water andair．D
A B C D．

分析沒有水或空氣，我們就無法生存．

解答答案：D 根據前文we can't live我們不能生存，是一個否定句，并列結構中，or通常用于否定句，and用于肯定句．故用連詞or，表示或者，故D項錯誤．

點評并列結構中，or通常用于否定句，and用于肯定句．但有時and 也可用于否定句．請注意其不同特點：There is no air or water in the moon．There is no air and no water on the moon．在否定中并列結構用or 連接，但含有兩個否定詞的句子實際被看作是肯定結構，因此要用and．

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