设有三个随机事件<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/148360277019884bb2399bc114d8eb4d461295d8095e9image83.png"">,事件“<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/14836027702319115cda4efe240fdac500de0d8636139image83.png"">中恰好有两个发生”可以表示成( )<br>·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1483602770260dea1beb4c40c462f961967f1a03369faimage84.png""><br>·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/14836027703118c01ca812059498fb248f2e24056276cimage85.png""><br>·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/148360277035207ed8a119a5e4b62b5233e3b3da230b1image86.png""><br>·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1483602770434ca22e07439274e1b8f26cc886df6832fimage87.png"">"

设有三个随机事件<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/148360277019884bb2399bc114d8eb4d461295d8095e9image83.png"">,事件“<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/14836027702319115cda4efe240fdac500de0d8636139image83.png"">中恰好有两个发生”可以表示成( )
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1483602770260dea1beb4c40c462f961967f1a03369faimage84.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/14836027703118c01ca812059498fb248f2e24056276cimage85.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/148360277035207ed8a119a5e4b62b5233e3b3da230b1image86.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1483602770434ca22e07439274e1b8f26cc886df6832fimage87.png"">"

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