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Industry experts said that 5G mobile phones will enter large-scale sales, possibly by 2020. However, 4G smart phones are still the main sales force in the mobile phone market this year.From the carrier point of view, besides pictures and texts, audio and video are widely used. The "Learning TV Station" of the website and the "Learning Video" section of the client have a large number of audio and video materials about Xi Jinping.In 2012, Li Lei's father was found to have advanced cancer. It took only half a year from diagnosis to death. Two years later, Li Lei's mother had a blood system problem and died after being hospitalized for a week. In the two years between the ages of 26 and 28, Li Lei lost two close relatives.Article 30 Anchoring ships and grounded ships3. Antiplatelet drug antiplatelet therapy is an important part of the prevention and treatment of thromboembolic diseases, especially in white thrombosis such as arterial thrombosis. Drugs that have been used clinically for many years and can prevent platelet adhesion, aggregation and release, thus preventing arterial thrombosis, are called antiplatelet drugs. The mechanism of action is that the occurrence of thromboembolic diseases is firstly caused by various pathogenic risk factors damaging endothelial cells, causing blood cells to adhere and aggregate, activating platelets and releasing various vasoactive substances, such as TXA2, 5-HT-TG, etc.