题目信息
In an effort to reduce the number of fires started by cigarettes, a major tobacco company is test-marketing a cigarette in which thin layers of extra paper are used to decrease the amount of oxygen entering the cigarette, thereby slowing the rate at which it burns and lowering the heat it generates.
A:in which thin layers of extra paper are used to decrease the amount of oxygen entering the cigarette, thereby slowing
B:in which they use thin layers of extra paper in decreasing the amount of oxygen entering the cigarette, which slows
C:that uses thin layers of extra paper to decrease the amount of oxygen when it enters the cigarette, thereby slowing
D:for which thin layers of extra paper are used to decrease the amount of oxygen that enters the cigarette, and thereby slowing
E:using thin layers of extra paper in decreasing the amount of oxygen entering the cigarette, which slows
参考答案及共享解析
共享解析来源为网络权威资源、GMAT高分考生等； 如有疑问，欢迎在评论区提问与讨论
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已选答案：
正确答案：
A:in which thin layers of extra paper are used to decrease the amount of oxygen entering the cigarette, thereby slowing
选项分析：
A 正确
B 选项they指代不明，前文有出现company但都是单数，没有负数。
C 选项when it enters the cigarette, IT指代不明。
D 选项and链接两个句子，句子结构有问题，这里slowing是从句，附属与这个句子，和主句没有并列关系。
E 选项which指代不明。
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