请求人申请扣船的，时效自申请扣船之日起中断。
It is possible to use SETBLOCK on a free memory block. Programs obviously should not be doing that, because they do not own free memory. However, DOS makes no attempt to prevent such calls. In addition, thanks to the surprising behavior noted above, successfully calling SETBLOCK on a free memory block will effectively allocate it.
。关于这个话题，旺商聊官方下载提供了深入分析
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