A-A+
The men who had seven or more siblings had mor
问题详情
The men who had seven or more siblings had more than ______ the risk of developing stomach cancer, compared to men with the same H. pylori strains who had one to three siblings.
A．eighth
B．one
C．forth
D．twice
参考答案
正确答案：D
解析：文中第四段交代：在同样携有H型幽门菌的人群中，家庭成员超过七个甚至更多的人患胃癌的机率是家庭成员在一到三人的人的2倍。因此，D项正确。
