欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

解:(1)當(dāng)或時(shí).分式無(wú)意義. 因此.從已知數(shù)據(jù)中隨機(jī)抽取一個(gè)數(shù)代替.能使已知分式有意義的概率為,··········· 2分 (2) ································································································ 4分 ．····················································································································· 5分 取0代入.得原式． 6分 【查看更多】

 

題目列表(包括答案和解析)


同步練習(xí)冊(cè)答案