阅读材料，回答问题：

材料一  顺治初年，为了对付东南沿海及台湾的抗清势力，清政府实行海禁，下令“片板不准下海”。

材料二  洋船至宁波者甚多，将来番船云集，留住日久，将又成一粤省之澳门矣。

材料三

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均仅限一词；

2). 只允许修改10处，多者（从第11处起）不计分。

    I asked Jack, a friend of mine, what has happened to him that night. He said that he had just got into bed on about half past eleven when the floor began to shake under him. The bed was also started shaking. He jumped out of his bed rapid and wanted to turn the light on. But the floor was shaking such violently that he could hardly reach the lamp. It seemed to take him long time to get to it and turned it on. Then he went to look out of the window. He saw that the houses on the other side of the street was also shaking. Then he knew that was happening — an earthquake! He quickly put on his clothes and ran out into the street to waiting until it was safe to go back inside.

计算$\sqrt{48}-9\sqrt{\frac{1}{3}}$的结果是

阅读材料回答问题

材料一：“4•26”世界知识产权日前夕，北京市文化市场行政执法总队、北京市文化市场管理工作领导小组办公室、北京市“扫黄打非”工作领导小组办公室公布了2011年以来十大侵犯知识产权案例。案件查处中，共收缴非法出版物353317册、侵权盗版音像制品13.2381万张（盒），刑事拘留52人，14人被判处有期徒刑。

材料二：在是否购买盗版书籍问题上，甲乙两同学发生了争论：同学甲：购买正版还是盗版书籍，这是公民的权利。同学乙：拒绝盗版，这是公民的义务。