A: 病例组肺癌的患病率明显大于对照组
B: 病例组发生肺癌的可能性明显大于对照组
C: 对照组发生肺癌的可能性明显大于病例组
D: 对照组肺癌的患病率明显大于病例组
E: 不吸烟者发生肺癌的可能性明显小于吸烟者
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