This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
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Matthew Smith had to wait almost a year for a double lung transplant，更多细节参见Line官方版本下载
"It's going to affect things so much, if this team wins, if that team draws…" says the creative director from North London. "So, to then go on your phone and find that you can't even get a bar? It's crazy."
"I believe we've had a problem here," said Swigert. Lovell had to repeat the message to a stunned Mission Control: "Houston, we've had a problem."