设事件<img src="/lqwvjeImg/d5/d548df31facdd9a9a5faa6e5cc509dd1.png"style="width:16px;height:17px;">和<img src="/lqwvjeImg/50/50c2313235b3bf58d8d20d59e4e152e6.png"style="width:16px;height:17px;">满足<img src="/lqwvjeImg/10/105fc2a67e478b15fc1b4cbb2a4e599f.png"style="width:80px;height:21px;">,则( )。<br>·<img src="/lqwvjeImg/d5/d548df31facdd9a9a5faa6e5cc509dd1.png"style="width:16px;height:17px;">为必然事件<br>·<img src="/lqwvjeImg/d5/d51c7b7619f86657f31c0fa97cd122b2.png"style="width:81px;height:24px;"><br>·<img src="/lqwvjeImg/8d/8d05cb10f03fd752fb71bf2f415db74c.png"style="width:45px;height:17px;"><br>·<img src="/lqwvjeImg/33/3335f738d503db8c106d3d53a76dbc89.png"style="width:45px;height:17px;">