第29题: [单项选择]Why does the author mention the Eastern Corridor and the California coast in Paragraph 4 A. As examples of megapolises. B. Because 75 percent of the population lives there. C. To conclude the passage. D. The Bureau of the Census is located there. 参考答案:A 答案解析:[分析] 细节题型。
根据第四段的the Bureau reports more than 280 MSAs, which together account for 75 percent of