大联考答案

在R△OAD中，∠A=30,故OD=20A=2∴CD=OC+0D=1+2=号.…8分25.解：(1)根据抛物线的顶点式可知点D的坐标为(1，一3).…2分(2)如图，过点P作PM⊥x轴，由于∠POQ与∠DOE互余，则...

因为f(0)=0,f(1)=1n2,f(2)=21n3,f(3)=f(1)=ln2,所以f(0)+f(1)+f(2)++f(2023)=506(0+ln2+2ln3+ln2)=1012ln6,故D错误.13.7因为C=Cg+1=n+1Dm=28,所以m+-56=(m-7)(m...

第2章函数学生用书4.已知y=f(x)是定义域为R的奇函数，当x考点4：函数零点的应用∈[0，十∞)时，f(x)=x2-2x,若方程f(x)=a恰有3个不同的解，则a的取值范围是x2+2xl,≤...

第八章平面解析几何能力强化练6(2023山东弹坊高三二模)已知M,N为椭圆C,:。x25(2023广东深圳高毛模拟已知双曲线C为1x2y=1(a>0)和双曲线C:。y=1的公共顶点，e,(a>0...

第十四章整式的乘法与因式分解14.3因式分解14.3.1提公因式法(共185考：单独71考，在整式或分式的化简求值中涉及114考)教材知识》答案见本册P76知识点①因式分解重...

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化简得(m24)t2+4)=-8t2m2,易知原点0到直线AB的距离d=1+t2又直线4B与圈0：r+y2=号相初，所以例即2=7m2-1,10分V1+2[(m2-4e2+4)=-82m2由=2m2-1，得21m-16m2-16=0,即...

更合算.考点49二项分布、超几何分布与正态分布解折：由题意知n=6,力三3，故P(X=2)=C⑧X1.D(传x-=c×(传》×)-器故选D.2.C解析：由随机变量X服从二项分布B(n,p),又E(...

3,∴.M(3,3),.k=3×W3=33.钟，令y=20,得20=400解得x=20,.水从20℃升温至100℃再降温至20℃的过程，儒要20min,令x=30-20=10,得y视0=40.当饮水器接通电源30min时，水温...

A.CiB.Cic.CD.CC7.己知空间向量a,b,c两两夹角均为60°，且d=l=1,d=2。若向量x,y满足x(x+a)=x·b,y(y+a)=yc,则x-y的最小值是D.V3-12c8.己知a试比较a,b,c的大小关系A...

14.【答案】26【解析】由题意知7×2c·b=3,所以be=3,故C的长轴长2a=2VP+c≥2√2c=26.15.【答案】x4(或1120x,或256x2,写出其中一个即可)【解析】由题意知展开式中共有...

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h(x)=e-x在(0，ln2]上单调递增，1<h(x)≤2-n2,.a=e-x(0<x≤ln2),.1<a≤2-ln2.

2版华师大七年级参考答案第5期数学周刊第14期参考答案(2)DE的长不变，DE=I0cm4.解：(1)110第3章整式的加减期未复习指导(2)因为∠AOC=40°，∠A0D=60°，所以∠C0D=∠A0...

和她尚在襁褓的婴儿被困废墟。29.A。理解词汇。根据第三段中的they would never be found以及she looked to her baby asa source of strength可知，Camuz被困废...

第3期参考答案答：这10天要付645元人工搬运费。即学即练：1.D2.B3.C4.结合律5.0情境导入：0.5+2.5-1.2+1.1-1.4=(0.5+2.5+1.1)+(-1.2-1.4)=4.1+(-2.6)=1.5(km).6....

1.B2.C3.DA4.E5.white6.red7.yellow8.pink9.blue10.Japan11.thirteen12.pink13.big14.a brown cap完形小测1.student2.Who3.years4.whose5.short6.small7.big8.bl...

Gradually,it became common practice for注意：ordinary people to drink tea.Drinking tea is of1.续写词数应为150左右；great benefit.It can help us keep f...

33.What does the underlined word“they”inpa哭graph6 refer to??A.People.B)The mother dolphins.C.The young dolphins.D)Scientists.34.Why does the author m...

sponsible)toyears.)over the past 10m your sparethe healthy2.John?年金因乙Doing housework is helpful for us to be责王心的人).M:I often tead,listen toba...

W:I'm Mary.I have visited India twice,one for work purpose,and another with my parents for a tour.I enjoydelicious food and wonderful scenery.I'm impr...

第一部分 听力（共两节，满分30分） 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、 B、C三个选项中选出最...

C.They are stimulating games for children. D.They are seldom used except in architecture. 29.【典型情境题】What does paragraph3 mainly talk about? A.T...

Ask for help if you can't get past a need to be perfect Focus on what goes well.Are you so used to talking about problems that they're all you see?It'...

B.Trying to reach an agreement. C.Planning a meaningful weekend. 听第10段材料，回答第17至20题。 17.What did the speaker enjoy as a young child? A.Runn...

1.续写词数应为150左右； 2.请按如下格式在相应位置作答。 The family carried on with the experiment for the 6 months without technology controlling their...

them. In addition,we have the power of visualization,a technique involving focusing on positive mental images in order to achieve a particular goal.Re...