Offences against public service: Refers to acts that impede the performance of official duties by state agents by threats of violence. According to the above definitions, Which of the following acts are crimes against public service:. ['A public security officer collided with a person when he rode into the street to buy something. The impacted person was so angry that he caught the public security personnel and caused crowds to watch, which seriously affected the traffic order.', "When prosecutor Xiao Liu from a prosecutor's office was investigating a corruption case, he was besieged, scolded, beaten by the family of the suspect Wu in the case, and threatened to smash Xiao Liu's house if he continued the investigation.", "Accounting of a company Ye defendant has been guilty of embezzlement. Prosecutors went to Yemou company to check the accounts. Prosecutor Yangmou tore up the cover of a book because of his anger. Yemou's manager was very dissatisfied with Yang. Someone quarreled and recovered the ledger.", "Humou is a self-employed person and was fined for tax evasion. For this reason, Humou hated tax officials very much. One day Humou gathered a few hooligans and found the tax office cadre Dongmou's house, smashing all the windows and doors of his house. Go away."]