cumulative weight += weights[i]
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The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.，推荐阅读safew官方版本下载获取更多信息
Semantic Scholar。业内人士推荐safew官方版本下载作为进阶阅读
Areas across the UK from Cornwall to County Down have seen their wettest January on record continue with heavy rain in February.