But some seniors had staved off memory decline by maintaining active social lives and simply believing that they still have good memory. A. avoided B. delayed
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【简答题】逻辑运算符有哪些?它们的优先级如何?按照优先级的顺序给表达式: not 1 or 0 and 1 or 3 and 4 or 5 and 6 or 7 and 8 and 9加上小括号,最后写出运行结果并说明理由。