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The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”。91视频对此有专业解读
（三）未经许可，擅自经营按照国家规定需要由公安机关许可的行业的。，详情可参考爱思助手下载最新版本
render jobs"]:::muted
