Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.
变化五：竞争格局从“三足鼎立”到“多元博弈”传统存储行业长期由三星、SK 海力士、美光三家主导 DRAM，三星、铠侠、西部数据、美光、SK 海力士主导 NAND，形成稳定的 “三足鼎立 + 五强割据” 格局，定价权、技术路线、产能节奏高度集中。但 2025—2026 年，随着 AI 需求爆发、先进封装独立成链、本土厂商技术突破，行业正式进入多极竞争的全新博弈阶段。
。关于这个话题，Line官方版本下载提供了深入分析
整机来看，Tab Plus Gen 2 采用四等边屏幕设计，采用银色铝合金后盖，并且音量键以及电源键均位于背部。
（二）享有政治权利，人身自由未受到限制；