2024届金学导航答案网

记总样本的样本方差为s2,则2=12×[1+1-1.2)]+8×[0.25+1.5-l.2)21=0.76.20所以，这20人答对题目的样本均值为1.2，样本方差为0.76.6分(2)设事件A为“李明同学从乙箱...

第10章轴对称、平移与旋转C.通过轴对称、平移或旋转变换而来的图目方法总结形与原图形一定全等1.全等图形的特征：(1)两相同：即形状D.等边三角形有三条对称轴相...

中因国家大剧院是亚洲最大的剧院综合体，中国国家表演艺术的最高殿堂，中外文化交流的最大平台.大剧院的平面投影是椭圆C,其若函数)10长轴长度约为212m,短轴长度...

62.todo(解析：考查非谓语动词。have nothing to第十行：80.tradition→traditions(解析：考查名词复W:Nothing important.I only wanted to invite you toM:Thank...

34.C词义猜测题。根据第三段最后一句可知，“state-of-the-art language learning features”包括每日课程、专门的语言内容、语音辨识等，结合上文介绍的基础课程...

灯三步一体高效训练卷行天下·数学月考卷一计数原理(120分钟150分)目鼠微信扫码▣尚▣命题高考对接点计数原理和排列组合是高考常考点，客观题和主观题都会考初点命...

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所以SS√合BNin∠BN·IFAIIFMIsin∠AFMVFB FAS1+S3IFBIIFMIsin∠MFB+FAIIFNIsin∠AFNFBI+FA4(m2十2)V(1+1y21)2=√(y+y2)2-4y2-V16m2+16(m2+2)4'…11分解得m2=1,即m=士1，...

中考必刷卷·2023年安徽中考第一轮复习苍数学专题（九）温馨提示：1.本卷考查内容为三视图、尺规作图，图形的变换（平移、对称、旋转和位似）2.本试卷共8大题，计...

纵千文化2023届高三年级十二月联考Day4 Overview lakes and glens(峡谷)In the films,mysterious,misty landscapes frame the background of Harry's tale,so it...

2分数学用报2022一2023学年广东专版九年级第1~4期MATHEMATICS WEEKLY答案专期【第3期】22.1.1二次函数1.ax2+bx+c,a≠0，ax2,bx,g2.B3.-14.y=a(1+x)2,是5.y=-2x2+4...

这段经历并没有把Mus训吓坏，相反还激发了他想要更好地了解这些动物的决心。他开始在全球范围内探寻鲸鱼的知识，最终结果都收录在他的著作How to Speak Whale:AV...

二、选择题：本题共4小题，每小题5分，共20分.在每小题给出的选项中，有多项符合题目要求.全部选对的得5分，部分选对的得2分，有选错的得0分.9.设数列{αm},{bn}...

第15期B4版Keys:(One possible version)to call for help before your phone is out of power.文学天地If you are in an accidentThe King asked for the pestle...

参考答案诉我们可以从这些文学和音乐作品中收获很多。2.What kind of competition/What's the competition about1.was full of/filled with 2.in the face of 3....

B.Using the wrong accent.C.Appearing in front of the audience.15.Why did Brittany go into TV acting?A.She needed to earn more.B.She lost interest in t...

31-35 ADCBC36-40 ADGFB41-45 CDBCA46-50 CDBAD51-55 ACBDB56.that /which57.believed58.particularly59.basing60.for61.properties62.and63.is thrown64.luckie...

此时f(x)在R上单调递增又f日=e-1<0.f0)=1>0,所以fx)在(20)内存在唯一零点.所以f(x)在R上存在唯一零点2当a=0时，f(x)=e>0.所以f(x)在R上无零点.③当a>0时，令f"(x)...

全国100所名校高三AB测试示范卷教学last longer.札记M:Look at my face.Do I smile a real smile?(Text 9)M:Hey.Hey.Hey!You can't do that.That's not fair.W:W...

72正确；对于选项B,当x=2时，x+42=6,故选项B正确；对于选项C,若4，b43/7异号则0故选项c错误对于选项D,y二049R+9十。平a b2+9x2+9数学答案第2页，共7页当且仅当+9...

·解得B队产中,”++年-2v@+i用6、m>1,所以AB引≥2√(6+1)-1=2b,即ABm=2b,A项正确.662-626o+迪三背,b,一为+边=02PRb)是AB的中点，所以SAaP=SAcP,B项正确.题如点D的坐...

决胜新高考—2024届高三年级大联考数学参考答案与评分细则本试卷共6页，22小题，满分150分。考试时间120分钟。注意事项：1.答卷前，考生务必将自己的姓名、考生号...

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点P在线段DE上运动(1)当P为DE中点时，设AP=2AB+uAD(几，H∈R),求+的值；(2)若∠BAD=60°，求AP·AF的取值范围.【解析】1)P为D5中点时，0-分0+-{而+丽+50西+01=3,元+4...

,国©0所名校高三单元测试示范卷【题分折]取BC的中点0连鞋A0,日为△ABC方等生三有形，测A0LBC,且Ai ABC,以点0为坐标原点，建立如图所示的空间直角坐标系，Ar号o0B0...

听力材料Text62.What does the man mean?W:Hey,what a surprise to meet you here!When did youA.He'll choose other letters.start taking the school bus?(6)...

D.The rise of other living species. 23.What can be done to make things better according to Mitter meier? A.Setting up reserves. B.Cancelling subsidies...

and sensibility.On his new album,"Angel Band:Free Country Vol.3”,Harrison,on guitar and vocals(演唱)，and his band take on many traditional bluegrass...

附： 听力部分录音材料 (Text 1) W:I think I'll have the duck,please. M:I'm very sorry,Madam.I'm afraid there isn't any left. (Text 2) W:Excuse me.Visit...

a 26 Catherine,Davey,and a group of self 27 “enV1 ronmental pick-up artists" went on a coast to coast road side trash pick-up.As they walked,sometimes...