最佳答案:几乎都围绕在C5-EX1或C5S-EX1上作展开。C5-EX1或C5S-EX1﹙贴牆必须﹚->C1-EX2或C1S-EX2。C2﹙贴牆必须﹚->C5-EX1或C5S-EX1。C2或C3﹙贴牆必须﹚->