请仔细阅读下列材料。

“迄今牛邑犹荒凉，居民生资惟榷场。马军步军自来往，南客北客想经商。” ——（宋）刘通

请回答：

（1）什么叫“榷场”？

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（2）“榷场”有何作用？

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（3）你如何看待诗中所云历史现象？

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Your ship is carring hazardous cargo.During a daily inspection, yopu notice that some of the cargo has shifted and several cases are broken. You should first（）.

A.call out the deck gang to jettison the cargo

B.log the facts in the rough log and inform the chief mate later

C.make a determination of the seriousness of the breakage, and do what you think best

D.report the facts immediately to the Master, who will make a decision