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【单选题】

People from large families have an increased risk of stomach cancer, suggests a study that followed more than 7,000 Japanese-American men for 28 years.
The study concluded that family size had a major influence on the development of stomach cancer linked to the bacterium Helicobacter pylori (幽门螺杆菌), and that younger siblings (兄弟,姐妹,同胞,同属) from large families were especially prone to the most common form.of stomach cancer.
H.pylori lives in the mucous (黏液的) layer of the stomach and is associated with peptic ulcers (消化器官溃疡) and stomach cancer.It's estimated that half of the world's population carries H.pylori in the stomach.It can be transmitted orally from person to person or through contact with human feces (粪便).
The study found that men who carried certain strains of H.pylori in their stomachs and had seven or more siblings had more than twice the risk of developing stomach cancer, compared to men with the same H.pylori strains who had one to three siblings.
The findings are published in the January 16 online issue of the journal Public Library of Science Medicine.
'This is a very carefully controlled study that clearly shows that there are factors in early childhood that affect the risk of developing cancer many decades later,' study leader Dr.Martin J.Blaser, professor and chairman of the Department of Medicine, and professor of microbiology at New York University Medical Center and School of Medicine, said in a prepared statement.
'That early childhood s affect the risk of cancers occurring in old age is remarkable, and this may be a model for other cancers,' Blaser said.He said that younger children in large families may acquire H.pylori from older siblings at a time when the younger children's immune systems are still developing.This, in combination with the fact that the bacterium is already adapted to a genetically related person, means the younger children may have a more virulent H.pylori population in the stomach than if they'd acquired the germ from a non-relative.
Which of the following statements can best generalize the passage?

A.
Family size may determine stomach-cancer risk.
B.
Family size may move stomach-cancer risk.
C.
The study may follow more than 7,000 Japanese-American men for 28 years.
D.
People from small families have an increased risk of stomach cancer.
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参考答案:
举一反三

【单选题】宋江与武松结拜兄弟后,武松干的第一件是( )

A.
武松打虎
B.
武松打恶霸
C.
武松打小偷
D.
武松打西门庆

【单选题】下列哪种药无抗幽门螺杆菌作用( )

A.
奥美拉唑(洛赛克)
B.
枸橼酸铋钾
C.
阿莫仙
D.
呋喃唑酮(痢特灵)
E.
西咪替丁(泰胃美)

【单选题】细胞内的消化器官是()

A.
线粒体
B.
高尔基体
C.
内质网
D.
溶酶体

【单选题】对幽门螺杆菌致病性叙述正确的是

A.
与消化性溃疡密切相关
B.
与溃疡性结肠炎有关
C.
与自身免疫性慢性结肠炎有关
D.
与自身免疫性慢性肾炎有关
E.
与自身免疫性慢性肾小球损害有关

【单选题】某甲的外祖父与某乙的父亲是亲兄弟,某丙的外祖母与某丁的祖母是亲姐妹。则

A.
某甲与某乙、某丙与某丁的婚姻均有效
B.
某甲与某乙、某丙与某丁的婚姻均无效
C.
某甲与某乙的婚姻无效,某丙与某丁的婚姻有效
D.
某甲与某乙的婚姻有效,某丙与某丁的婚姻无效
相关题目:
【单选题】宋江与武松结拜兄弟后,武松干的第一件是( )
A.
武松打虎
B.
武松打恶霸
C.
武松打小偷
D.
武松打西门庆
【单选题】下列哪种药无抗幽门螺杆菌作用( )
A.
奥美拉唑(洛赛克)
B.
枸橼酸铋钾
C.
阿莫仙
D.
呋喃唑酮(痢特灵)
E.
西咪替丁(泰胃美)
【单选题】细胞内的消化器官是()
A.
线粒体
B.
高尔基体
C.
内质网
D.
溶酶体
【单选题】对幽门螺杆菌致病性叙述正确的是
A.
与消化性溃疡密切相关
B.
与溃疡性结肠炎有关
C.
与自身免疫性慢性结肠炎有关
D.
与自身免疫性慢性肾炎有关
E.
与自身免疫性慢性肾小球损害有关
【单选题】某甲的外祖父与某乙的父亲是亲兄弟,某丙的外祖母与某丁的祖母是亲姐妹。则
A.
某甲与某乙、某丙与某丁的婚姻均有效
B.
某甲与某乙、某丙与某丁的婚姻均无效
C.
某甲与某乙的婚姻无效,某丙与某丁的婚姻有效
D.
某甲与某乙的婚姻有效,某丙与某丁的婚姻无效
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