A,B为事件,<img src="/lqwvjeImg/af/af124dcfcb956b77587f963a2a307790.png" style="width:44px;height:24px;">=( )<br>· AB<br>· <img src="/lqwvjeImg/7f/7ffebcd6b857038f849447e391c13c9b.png" <br>· <img src="/lqwvjeImg/ab/ab9f0ef91441fd755335defae114c9be.png" <br>· <img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16984715425501ceb8d9fdfb24a4a84a8058bf01a30b6image124.png"

A,B为事件,

=( )
· AB
·

· <img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16984715425501ceb8d9fdfb24a4a84a8058bf01a30b6image124.png"

出自：佳木斯大学语言治疗学

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