【单选题】【消耗次数：1】
需要进行心理干预的对象是（）。
①
A.事故与事件的目击者
②
B.事故与事件的幸存者
③
C.事故与事件当事人的亲人
④
D.以上均是
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【单选题】
当事件A与事件B同时发生时，事件C必发生，则
①
<img class=jc-formula data-tex=P(C)\le P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/FE4D23A75A0FDF615549CD693CCA4074.png style=vertical-align: middle;/>
②
<img class=jc-formula data-tex=P(C)\ge P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/1A87B835222822C61BB0298E2EFFEC94.png style=vertical-align: middle;/>
③
P(C)=P(AB)
④
<img class=jc-formula data-tex=P(C)=P(A\cup B) src=https://huaweicloudobs.ahjxjy.cn/60E6C036BB44365D21CFADA8E2F5C773.png style=vertical-align: middle;/>
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