Halloween is a very popular holiday in North America. People celebrate it on October 31st. On this day, many people decorate their houses. Many people like to make jack-o'-lanterns. They are made from pumpkins. Some jack-o'-lanterns are funny and some are scary!

    Children wear costumes and go trick-or-treating to collect candy. Many of these costumes are scary! Witch, ghost, vampire and black cat costumes are popular.

海水“晒盐”得到的是粗盐，粗盐提纯的步骤可简单的概括为：溶解﹣过滤﹣蒸发，下列说法错误的是（  ）

材料一：“周灭了商，席卷整个中国北方。靠当时用马车传递的原始通讯方式不可能直接管辖这样大的地区。周王还授权给一大批诸侯，这些诸侯大部分是国王的后裔和亲戚，但其中也包括一些承认周宗主权．与国王没有血缘关系的国王亲信和地方贵族。”

——《中国：传统与变革》

材料二：（秦朝）廷尉李斯议曰：周文武所封子弟同姓甚众， 然后属疏远，相攻击如仇雠（chóu），诸侯更相诛伐，周天子弗能禁止。今海内赖陛下神灵一统，皆为郡县，诸子功臣以公赋税重赏赐之，甚足易制。天下无异意，则安宁之术也。置诸侯不便。”

——《史记》

材料三：
    

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