20.一个不透明的袋中有。个正品零件和b个次品零件，从中任取一个，如果取出的是正品，则把它放回袋中：如果取出的是次品，则该次品不放回，另补一个正品放到袋中...

布形仁所以俗雨C的方程为号+y=1由当条在酸家不存在对一一1代人将圆方程得方+y-1=士号。用长1aAB1-号-(-号-区.月直线斜事为01MN=22.5w=/ABN=7Xv2X2y2=2;…店资释骑...

第1章1.4~1.6同步测试题-、1.D2.D3.D4.D5.46.C7.G8.C二、9.510.AC=D11.A'B':∠DA'B',∠BA',C12.1013.2514.17三、15.如，△ABC就是所求作的三角形BE第15题图16.因为A...

|F2G|=|F2E|,所以|PF,|-1CD1=30,由+°-2yy=10+2,得IPF2=(PD DF)-(PE+所点Q的轨迹为焦点在y轴的双曲线yiy23t2-1IEF2)=DF-EF2=GF的上支，且2a=10,2c=30,1+=10+2.10+...

数学2023-2024学年人教八年级答案页第2期®学习团报第7期13.2画轴对称图形(3)平行理由：如图，连接BD和2版1.BEC,AF交BD于点G13.1.1轴对称2.解：如图，四边形A'B'C...

(2)答：CD⊥AE.因为a=31b1,而.证-(a-b小（合+）…6分…8分laP-2 1-(361)-0…9分所以CD1AE,所以CD LAE.…10分18.(12分)【解析】(1)由图可知众数为75；…2分因为0.05+0.0...

第9章统计学生月书(2)样本相关系数r的性质当r>0时，表明成对样本数据Y=0Y=1合计X=0a6a十b当”<0时，表明成对样本数据X=1dc+d合计a十cbdn=a+b十c+d样本相关系数r的...

大一轮复习学案数学第五节事件的相互独立性、条件概率与全概率公式课标要求1.了解两个事件相互独立的含义2理解随机事件的独立性和条件概率的关系.3.会利用全概率...

第十五章分式第2课时分式方程的实际应用(共242考：单独64考，结合函数或不等式（组）的实际应用178考)重难题解法》答案见本册P78●分式方程的实际应用2考现学活用...

2023届贵州省六校联盟高芳实用性联考卷（四）英语参考答案第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）1~5 BCABD6~10 CDCAA11...

显然C>0.②-①并化简得a+b>0,选项A正确：2×①+②并化简得2a+c>0→a+c>-a>0(a<0),选项B正确：由①有b=a+c,故-a+b+c=-a+a+c+c=2c>0,选项C正确；b2-2ac-5a2=(a+c)2-2ac-5a...

Why hasn't Anna bought her plane ticket?9.题A.Because she didn't want to go out.B.Because she hasn't saved enough money.C.Because she is very busy and...

e.g.2.These trees are the oldest (old)of all.山，根据上下文填入恰当的单词，或根据提示填3.Lisa is my best(最好的)friend.We stay写单词完成短文。together...

绝密★考试结束前2023学年第一学期六县九校联盟期中联考高二年级数学学科试题考生须知：1·本卷共4页满分150分，考试时间120分钟；2·答题前，在答题卷指定区域填写...

第6期A2版Keys:(One possible version)高频词汇I.1.reaction2.equipment3.treatment4.satisfactionⅡ.1.paid off2.try out3.got through4.from then onIIⅡ.l.clas...

听力材料：节ALast year,I didn't like my English class.I was21.Readers can learn aboutin the first bookA.picture-drawing skillsChinese cultureafraid to...

WRITING PRACTICE求助信主体段：读后续写练练手1.遇到的具体困难There are three main problems I'm faced with阅读下面材料，根据其内容和所给段落开头语续写一...

可知，测试结果喜人。D篇主题语境：人与社会一一社会本文是新闻报道。初创公司Sook希望以商铺短租的方式拯救英国的商业街。32.C。理解具体信息。根据第二段中的J...

36.E。根据设空处前的Shortly after in 1957,she started her career in aviation和More than65years later,,Nash continues her career in the industry可知，N...

理解。较少使用语句间的连接成分，内容缺少连贯性。第一档(1一5分)：未完成试题规定的任务，信息未能传达给读者明显遗漏主要内容，写了一些无关内容，原因可能是...

23.C细节理解题。对比四个旅游团的日期可知答案。24.B推理判断题。根据第一段“..I wanted one and casually mentioned it to my daughter one day...Afewweeks l...

【答案】 Last Sunday,I accompanied two of my foreign friends,Tom and Mary,around Chengdu so that they could better know the amazed city.We began with...

Follow safe,legal driving practices and you're less likely to damage your car. 39 OMore job opportunities A clean driving record is a standard require...

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position in their chosen field. Money:During the regular academic year (September to April),you can work part-time and earn $3,200-sometimes more-whil...

C.Sometimes it requires you to rearrange your daily routine. D.More often than not,it's better to work out with a com- panion. E.So it's time to incre...

M:Too bad.It sounds as though there won't be much time for good music. W:The station is going to be on all day and all night without stopping.So I'm s...

3.Where does the conversation take place? A.In the kitchen. B.In the bedroom. C.Outside the house. 4.What is the requirement for the job? A.Working ab...

are losing fur are almost always left outside These signs don't necessarily mean a pet has been hurt on purpose,but they shouldn't be ignored.If you s...