59. Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans. Reserechers have hypotheized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an enviormental saracity of salt. A The blood pressure of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available , are low. A 是正确答案, 可为什么不是D呢? D Blood pressures are low among the Yoruba, who thorughout their history, have been situated far inland from sources of sea salt and far south of Saharan salt mines. 多谢各位!
其次，要看请问题。问题问的是“which of the following statements about present-day, westernized Black African”。所以，下面每一个选项所描述的事实都是有关westernized Black African这帮人的描述。那么很明显，既然这些人都是westernized，那么他们一定都是吃高盐食品的。所以要吧吃高盐食品这个条件带入到4个选项中去。
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发表于 2004-3-23 21:19:00
