[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fQAXsApGn3miLqUjjzxvKjAJt2QwsxkR-HFIX8aSWjng":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-12-26 08:08:43",243433706,[8,9,10,11],"3","2","9","6",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},24,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_45962373","作业2-1","已知随机变量X只能取-1, 0, 1, 2四个数值, 其相应的概率依次为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F99d581e4c74d298689c92662571a4404.png\">, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fea2768b0f501b692345ffe12cd50368f.png\">, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F94d5bfc5f210482f9feb0cbf7584af10.png\">, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd9489d6f2ba9b3a0c6eb9ea36cf7fb85.png\">,则c = ( )",[21,33,42,51,60,69,78,87,96,99],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-11-21 20:07:36",238806709,[26,27,28,29],"The international ivory sales.","The domestic ivory trade.","The slaughter of elephants.","Both a and b.","News report 1<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=27ce54cb25771dce426507497ba98984"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:1","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],238806710,[37,38,39,40],"On 31 December 2015.","On 31 December 2017.","In 2015.","In 2017.","News report 1<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=27ce54cb25771dce426507497ba98984"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:2",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],238806711,[46,47,48,49],"Conservationists applauded the move.","The price of ivory in China began to fall.","Ivory seizures fell dramatically.","Both b and c.","News report 1<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=27ce54cb25771dce426507497ba98984"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:3",{"answer":52,"createTime":23,"id":53,"options":54,"question":59,"source":31,"type":32},[],238806712,[55,56,57,58],"A competition.","A solution.","A device.","An organization.","News report 2<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=f9b4ebb2d0dbb3302c53e2eb49d504d6"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:1",{"answer":61,"createTime":23,"id":62,"options":63,"question":68,"source":31,"type":32},[],238806713,[64,65,66,67],"Six.","Four.","Sixteen.","Fourteen.","News report 2<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=f9b4ebb2d0dbb3302c53e2eb49d504d6"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:2",{"answer":70,"createTime":23,"id":71,"options":72,"question":77,"source":31,"type":32},[],238806714,[73,74,75,76],"On Tuesday.","On Thursday.","On Saturday.","Not mentioned.","News report 2<iframe src="\u002Fmodule\u002Faudioplay.html?objectid=f9b4ebb2d0dbb3302c53e2eb49d504d6"><\u002Fiframe>Read the choices. Then listen to the news report and choose the best answer to each question you hear小题:3",{"answer":79,"createTime":5,"id":80,"options":81,"question":86,"source":31,"type":32},[],243433704,[82,83,84,85],"0.6","0.5","0.4","0.3","设随机变量X 的概率分布为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffaf7ddcf0bb90a870128831dcad1b128.jpg\"> ,则a =( )",{"answer":88,"createTime":5,"id":89,"options":90,"question":95,"source":31,"type":32},[],243433705,[91,92,93,94],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa57995c998e26100911011315bd70dcc.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F904fb44bb430b767c743a7432b11d5a6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F526c2c58cfcd28eb545e465489068622.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feaee2ea299123225b955b0ee06388eeb.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6f620f0ea53d599aa177d67a3fe2c0e4.png\">",{"answer":97,"createTime":5,"id":6,"options":98,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":100,"createTime":5,"id":101,"options":102,"question":107,"source":31,"type":32},[],243433707,[103,104,105,106],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fed1faf7641de7d6c5af65edef2bf9300.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fef30f3e8418e52f7ed121d2e8beb1b00.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4535c95bfaf5805125c7f59d1e02ff1b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7c4d9147adcebcec1222578231986f58.png\">","事件 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F56bf6d9e37683a2b8db4265dd752c241.png\">发生的概率为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd56896ed8af28a09c159feaf1febd162.png\">,现重复进行n次独立试验,则事件 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F56bf6d9e37683a2b8db4265dd752c241.png\">至多发生一次的概率为( )"]