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(Cigarette smoke) has been shown to contain numerous compounds that (are known t
(Cigarette smoke) has been shown to contain numerous compounds that (are known t
游客
2025-05-09
14
管理
问题
(Cigarette smoke) has been shown to contain numerous compounds that (are known to) cause cancer in experimental animals and (they) appear to be strongly (linked to) human cancer, especially cancer of the lung
选项
A、Cigarette smoke
B、are known
C、they
D、linked to
答案
C改为that
解析
前后两个that从句由and连接,并列做定语修饰compounds。
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