_____ has been called the American Ruhr.

_____ has been called the American Ruhr.
A、The Colorado River
B、The Ohio River
C、The Missouri
D、The Mississippi
【正确答案】：B
【题目解析】：答案选B。The Ohio River has been called the American Ruhr.参见教材P177。
掌握“Land(USA)”知识点。