这题是因果结构:果——易得高血压;因——西方高盐食物和适应于缺盐的基因之间的相互作用 要选出加强这个因果结构的选项 且注意问题:Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?说明选项中讲的是西化了的黑人,且食物高盐是个不可变动的事实。 A: those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available——基因适应于不缺盐环境(食物高盐);血压低 异因异果,加强 D:who, throughout their history, have been situated far inland from sources of sea salt and far south of Saharan salt mines——基因适应于缺盐环境(食物高盐);血压低同因异果,削弱 |