【简答题】阅读理解。 Dear Sir or Madam, Last Thursday, I traveled on the 8:00 a.m. train from Glasgow to London King's Cross and I was quite angry with the service of your company. The train didn't come on time and ...
【单选题】The notion of NP-completeness has provided a(66)mathematical definition for(67)intractability of NP problems. But this measure applies only to worst-case complexity. Being NP-complete does not(68)that...