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CAD shortcut key refers to the use of shortcut key instead of mouse in CAD software operation for the convenience of users. You can use keyboard shortcuts to issue commands to complete operations such as drawing, modifying and saving. These command keys are CAD shortcuts.Usage scenario: Combine multiple objects together for operation, which is often used to represent tree structures, such as binary trees, numbers, etc.2. Next, enter the Save As interface in the following figure. We can find the format of the picture in the save type, as shown in the following figure. After selecting the required picture format, we can save the brain picture as a high-definition picture by clicking Save.清朝末年，江南小镇的富商白老爷被人杀死，酿成地方大案。赏金猎人安聘远受命前往白沙镇侦破疑案，他慢慢发现白老爷是因为知道一个秘密而死的。白家的四位夫人、日本人、土匪纷纷浮出水面，都为这个秘密费尽心机。随着案情逐渐水落石出，安聘远发现原来自己父亲和白老爷之死，都是因为一张金矿地图。十三年前，日本青龙会出钱请父亲勘探地质，不料发现了大型金矿；安聘远父亲不愿把金矿图纸交出而惨遭毒手；白老爷亦是被日本青龙会的势力所害。安聘远凭借着聪慧勇敢，拨开重重迷雾，终于查出幕后的凶手，得到了金矿地图。面对日本人的威胁，安聘远把地图扔到火里，他坚信，只要这座金矿还在中国的大地上，迟早有一天我们的后代会找到它，它永远属于中国。Set the position, whether the main fire power supply has independent power distribution cabinet power supply in the power distribution room, and whether the standby power supply form (commercial power, generator, EPS, etc.).　　与此同时，人工智能中的邪恶力量也在觉醒，他们策划了一场恐怖绝伦的入侵阴谋，矛头直指那颗美丽的蓝色星球——人类的最后家园！危机四伏之际，最神秘的异星历险猝然开启，最疯狂的拯救行动也随之展开！为了生存，星际探险员们将作出怎样的艰难抉择？恩怨交织，流落荒芜星球的英雄们命运谁主沉浮？更有神秘红色精灵，光之星米瑞斯的归宿究竟在哪里？浩渺星系，机械迷城，深层宇宙空间里那些高度发达的人工智能，又隐藏了多少不为人知的秘密呢？