What two major Chinese cities are located on the Yangtze River?

Why might have people followed the rivers to find their way into asia

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)

If the basis of an isosceles trapezoid have lengths of 11 and 26, what is the length of the median?