题型分类：事实信息题

原文定位：根据关键词Venice’s need to import可以定位到第一段中“But Chioggia produced a fine-grained salt, so when Venetians wanted coarser salt, they had to import it. Then, in the thirteenth century, after a series of floods and storms destroyed about a third of the salt-producing ponds in Chioggia, the Venetians were forced to import even more salt.”的部分。大意是说威尼斯需要进口，因为威尼斯人需要更粗的盐，而他们本地不生产。第二点就是遇到了洪水和暴雨，摧毁了三分之一的产盐池，所以更加需要进口了。

选项分析：

B选项：进口能够提供当地不能生产的另一种盐，对应文中的coarser salt，正确。

C选项：对应文中的“a series of floods and storms destroyed about a third of the salt-producing ponds in Chioggia”，正确。

A选项：原文说的是需要粗盐，所以要进口，并不是因为价格太贵，故错误。

D选项：原文没说威尼斯的盐都出口了，没有多少剩下给本地使用，属于无中生有，错误。