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单选

以下关于嵌入式系统中实模式说法错误的是(55)。

  • A.划分了“系统空间”和“用户空间”
  • B.OS内核与外围应用程序之间不再有物理边界
  • C.运行上下文和栈是独享内核线程
  • D.系统中“任务”或“进程”全都是内核线程
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