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杨长帆大概比了比，自己拳头完全无法塞进炮口，这门炮的口径足足比自己拳头小了一圈，自己身材比常人高大一些，拳头长度大概十来厘米，这么推算下来，这门炮的口径应该在75毫米左右，基本符合学术材料。2. Credibility includes two elements: one is the credibility of the disseminator, including honesty, objectivity, fairness and other character conditions; The other is professional authority, that is, whether the disseminator has the right to speak and the qualification to speak on specific issues. Credibility is divided into two types: high credibility and low credibility, namely stars and ordinary people. For the audience, if it comes from different disseminators, people's acceptance of it is also different. The higher the reputation of the star, the higher its credibility. Choosing a star to speak for a certain brand, relying on the star's leadership charm, the enterprise can transfer the star charm to the product and transform it into the connotation of the product to endow the product with new vitality and cordial association.栾布这心里就更不是滋味的。Private mediator mediator;On April 22, 2016, the State Administration of Press, Publication, Radio, Film and Television publicly announced the investigation of 15 media outlets, including Caijing magazine WeChat Public Number, for publishing false and untrue reports. Pointed out that: