试用二进制补码计算如下式子:(1)-25-13(2)-25+13(3)从计算结果中,归纳符号扩充方式
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What was the aim of building the Great Wall originally?
Where are the ruins of the Great Wall located now?
According somescientists, globalwaming the survival ofthewholehumanrace.
ThenumberofvstorsfrompartsofScotlandnotincluding the Edinburgh area was ,infact,relatively small(19%),andexceeded thenumberofoverseasvisitors(16%).