What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:
南方周末科创力研究中心，搭建中国企业科创力数据库，通过对运营主体/控股股东在中国的A股、港股和美股企业（也包括少量未上市，但有发布经第三方审计年报的企业）的研发投入、研发产出和企业经营等近30个指标进行梳理，以追踪中国企业的科创活动。，详情可参考同城约会
，这一点在同城约会中也有详细论述
▲ 截图来自小红书@去海边喝酒，详情可参考雷电模拟器官方版本下载
While HP’s SureView tech is similar, the amount of customization possible is incredible — and we all have our phones out in public much more than our… HP laptops. It could be perfect for keeping prying eyes off your banking apps, messaging apps and even dating apps.
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