假设字符串 s = "Welcome to Python",则 s.isalpha()返回
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假设字符串 s = "3.3",则 s.isdigit()返回
Complete the sentences using the present continuous tense.1. The wind (blow) hard now.2. Where you (go) at the moment?3. We can feel that a big storm(come).4. I not (work) at the moment.5. Be quiet! The baby (sleep).
赫伯特·西蒙对古典决策理论中运用“最优”和“绝对理性”为决策依据提出了挑战,他提出了____标准和____。
决策者把____,____和____等心理学因索作为决策的行为基础。