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若有意义，则x的取值范围为 ．
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根据短文内容及首字母提示填写所缺单词并将答案填写在答题卡标号为66﹣75的相应位置上. Haveyouheardofsumo相扑?It'sasport66stowrestling摔跤.Infactrobotsdosumotoo. ThreestudentsfromJinanExperimentalMiddleSchoolwonthesumocompetition67dthe16thRobofestWorldChampionshipin2016.Robofestisaninternationalcompetitionthatchallengesstudentstodesignbuildandprogrammerobots.In2016itwas68hatLawrenceTechnologicalUniversityintheUSA. Tworobotsfighteachotheronatableforthematch.Abottleisinthe69cofthetable.Ifarobotpushestheotherrobotorthebottleoffthetableand70ronthetableforthreesecondsitwillwin. TheChineseteamwontworounds.Whatwerethesecretsthathelpedthemwin?Firsttheymadetheirrobot71p.Theirrobotlookedlikealargeforklift铲车.Alsotheyusedahigh﹣poweredmotor.Themotormadetheirrobotstrongerwhenit72fwitheachother.Atthesametimetheirrobotwasvery73c.Theteamdesignedsomeprogrammestohelptheirrobotdealwithdifferentproblems. Inoneroundtheirrobotwaspushedtotheendofthetableand74afelloff.Butsuddenlyitstoppedandmovedtheotherway75i.Theirrobothadaspecialprogramme.Assoonasitdiscoveredthetable'senditwouldmovebackandpresentitselffromfallingoff.Reallyamazingright? 66. 67. 68. 69. 70. 71. 72. 73. 74. 75.
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为了传承中华民族优秀传统文化我市某中学举行“汉字听写”比赛赛后整理参赛学生的成绩将学生的成绩分为ABCD四个等级并将结果绘制成图1的条形统计图和图2扇形统计图但均不完整．请你根据统计图解答下列问题 1求参加比赛的学生共有多少名并补全图1的条形统计图． 2在图2扇形统计图中m的值为表示“D等级”的扇形的圆心角为度 3组委会决定从本次比赛获得A等级的学生中选出2名去参加全市中学生“汉字听写”大赛．已知A等级学生中男生有1名请用列表法或画树状图法求出所选2名学生恰好是一名男生和一名女生的概率．
﹣Wechathasmadeagreatdifferencetopeople'slife. ﹣.Wecanuseittocommunicatewithotherseasily. A.Completely B.Possibly C.Probably D.Exactly
将一副三角尺在Rt△ABC中∠ACB＝90°∠B＝60°在Rt△EDF中∠EDF＝90°∠E＝45°如图摆放点D为AB的中点DE交AC于点PDF经过点C将△EDF绕点D顺时针方向旋转α0°＜α＜60°DE′交AC于点MDF′交BC于点N则的值为
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