美国，突发威胁！白银暴涨，黄金直拉！

Group 1: Silver and Gold Market Reaction - On December 17, silver prices surged over 3%, reaching a peak of over $66, while gold prices also increased by more than 0.5% [1] - The London silver market reported a closing price of $65.729, with an opening increase of $2.010, representing a 3.16% rise [2] Group 2: U.S. Trade Relations and Technology Cooperation - The U.S. has threatened to retaliate against the EU if it continues to undermine American service providers, indicating a potential escalation in trade tensions [3] - The U.S. has suspended the implementation of a technology cooperation agreement with the UK due to dissatisfaction with British policies on food, industrial standards, and digital regulation [3] - The U.S. hopes to resume cooperation with the UK on key technologies such as artificial intelligence and quantum computing once substantial progress is made in bilateral trade negotiations [4]