A-A+
In the past many port cities did more trade w
问题详情
In the past, many port cities did more trade within their own country than with overseas ports.
A．Y
B．N
C．NG
参考答案
正确答案：A
解析：从第六段第二句“What evidence we have suggests that domestic trade was greater at all periods than external trade”以及此后所举的上海及加尔哥答的实例可知答案是 Y。
