【单选题】【消耗次数：1】
不能释放内存变量的命令就是( )
①
release all
②
clear all
③
clear
④
clear memo
参考答案：
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相关题目
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His explanation is not at all clear. I find it ____.
①
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②
confusing
③
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①
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③
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随机题目
【单选题】
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