设 A , B , C 为三事件,用 A , B , C 的运算关系表示 “ A , B , C 都不发生 ” 事件。
A.
B.
C.
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参考答案:
举一反三
【单选题】听力原文:W: Hello, Gary. How're you? M: Fine! And yourself ? W: Can't complain. Did you have time to look at my proposal? M: No, not really. Can we go over it now?. W: Sure. I've been trying to come up wi...
【单选题】听力原文:W: Hello, Gary. How're you? M: Fine! And yourself? W: Can't complain. Did you have time to look at my proposal? M: No, not really. Can we go over it now? W: Sure. I've been trying to come up with...
【单选题】听力原文:W: Hello, Gary. How' re you? M: Fine! And yourself? W: Can't complain. Did you have time to look at my proposal? M: No, not really. Can we go over it now? W: Sure. I' ve been trying to come up wi...