Number (2): Everything in this space must add up to 2. The answer is 1-0, placed vertically; 6-2, placed vertically.
Author(s): Stepan Savka, Andriy Serednytski, Dmytro Popovych
，详情可参考Line官方版本下载
Что думаешь? Оцени!。旺商聊官方下载是该领域的重要参考
Source: Computational Materials Science, Volume 267，这一点在WPS官方版本下载中也有详细论述