步骤操作现象（1）用pH试纸检验溶液的pH大于7；（2）向溶液中滴加氯水，再加入CCl₄振荡，静置CCl₄层呈橙色；（3）向所得水溶液中加入Ba（NO₃）₂溶液和稀HNO₃有白色沉淀产生；（4）过滤，向滤液中加入AgNO₃溶液和稀HNO₃有白色沉淀产生．

下列结论正确的是（   ）

阅读下面短文，按要求完成各项任务．

    Every year animals all around the world take part in some wonderful journeys．Here are the stories of two amazing animal travelers．

    Humpback whales （ 座 头 鲸 ） prefer a slow journey．The humpbacks，

    which travel over 10，000kilometers on their journey from Alaska to Hawaii，swim at a relaxing speed of about 1.6kilometers an hour．Although they don't swim fast，humpback whales travel farther than any other kinds of whale．

    Every August a fantastic sight can be seen in the skies above Ontario and Montreal﹣millions of amazing Monarch butterflies （ 帝 王 蝶） beginning their 4，000﹣kilometer journey from Canada to Central Mexico．In fact，the journey，which takes about 3months，is longer than the average （ 平 均 的 ） life of the butterfly．Finally many of the butterflies reaching their final place are the great grandchildren or even the great great grandchildren of the butterflies who began the journey in Mexico the year before．

下列说话最得体的一项是（  ）

下列数据是一些物质的pH，其中呈碱性的是 （　　）