5. How do I write a decent subject line?
I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
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主动作为、靠前服务，以开放胸怀回应合理诉求，共同寻找“最优解”，才能更好激发经营主体活力。
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