知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 3C Structure Using These A,B,C elements, we are able to assemble any SiC polytype. Demonstrated earlier mentioned are examples on the hexagonal polytypes 2H, 4H and 6H as they might be created in the Ramsdell notation the place the number signifies the layer as well as the letter https://landenhjhfc.dsiblogger.com/68825599/the-2-minute-rule-for-is-boron-a-metal-or-a-non-metal