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单选题 设A,B为随机事件,则下列各式中不能恒成立的是( )
D. 
学科：默认课程
时间：2025-11-19 08:19:12
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题目1单选题
<img src="https://tihai-oss-cloud.itihey.com/img/81db5cbb0537de99131a9cfe0850bb29.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/b348454d08f20513cc54ecb2f2015c4a.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/9490d8f2f97aecdfbe6c97c141378e4b.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/25fd0adad4c78c97d13909c21dd7a154.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/11e14d24e54338239c84195bae88c97d.png">
题目2单选题
<img src="https://tihai-oss-cloud.itihey.com/img/ac59b1551492e2b44acaddaf8c414a80.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/8c3c23599d84f9a78e2a246bd5445fe4.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/8f1098f15e2c23959146fcca21eea106.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/0c9751544fe7df7456365d55c7fbc048.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/cba9c4e3068f2614a0ebedfbf33d557a.png">
题目3单选题
<img src="https://tihai-oss-cloud.itihey.com/img/e04aba3addad61ee060161ae04125c57.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/65ff7ffbce21f76e23863391de8594f6.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/a0aca275783c2a81ab12f90892f5d071.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/d40c2208ff093a8220833d644866e32b.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/cc5818b5697e060131cdda3079b5dfac.png">
题目4单选题
设A,B为随机事件,则下列各式中不能恒成立的是( )A. P(A-B)=P(A)-P(AB)B. P(AB)=P(B)P(A|B),其中P(B)>0C. P(A+B)=P(A)+P(B)D. <img src="https://tihai-oss-cloud.itihey.com/img/5e2da8a1d0863c4e9c0dabda1270d40e.png">
题目5单选题
将一枚硬币连抛两次,则此随机试验的样本空间为( )A. {(正,正),(反,反),(一正一反)}B. {(反,正),(正,反),(正,正),(反,反)}C. {一次正面,两次正面,没有正面}D. {先得正面,先得反面}
题目6单选题
<img src="https://tihai-oss-cloud.itihey.com/img/66760c93c1566df6648ca1221ce4d143.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/3c0ede2c7fd9459758cd2bcd02824096.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/3118089d3b1506ebc4497e0ef1b8beed.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/e15e073c73cba04717e7af5442742609.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/8c20f36162aef6fa937add2d8256e7e1.png">
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/69138207f9867d194cc836ca130faecf.png">A. 2B. 4C. 6D. 8
题目8单选题
一猎人用猎枪(共有3发子弹)向一只野兔射击, 第一枪距离野兔200米,若未击中,他追到离野兔150米处进行第二次射击,若仍未击中,他追到距离野兔lOO米处再进行第三次射击,此时击中的概率为0.5, 如果这个猎人射击的命中率与他离野兔的距离的平方成反比,则猎人击中野兔的概率为( )A. 0.5B. 0.88C. 0.58D. 0.66
题目9单选题
<img src="https://tihai-oss-cloud.itihey.com/img/6cab5d3eee5e00a4f22b9aa95049939f.png">A. 1/2B. 1/3C. 1/4D. 2/3
题目10单选题
<img src="https://tihai-oss-cloud.itihey.com/img/5e0406e3e5cde36a073ce4b6f49e54a8.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/b2cd6080c03175b57badb7c3c9da7845.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/7ecd20e53187d2907217c097f2c1b227.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/938c61e1c29e7947398eabbb63ec5c0e.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/5af35862fb6eb66a736f454f1db8b879.png">
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