2026届海淀八模答案网

从而sin2a=2 cos2a=4+31018.解：(1)因为2 a cos B=2c+b,由正弦定理可得2 sin Acos B=2sinC+sinB,2sin Acos B=2sin(A+B)+sin B=2sin Acos B+2cos Asin B+sin B,12...

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54032【小问2详解】5-4-3-2-1012345-23x∈[-2,3]，由图象可知：当x=-2时，)取得最大值，最大值为4，当x=3时，f(x)取得最小值，最小值为-2.【小问3详解】当x≤0时，...

重庆市巴南区2024届高考诊断考试（一)数学试题(试卷满分：150分120分钟完卷)一、选择题（共8小题，每小题5分，共40分）1.已知集合4=12r.5x>0},B=0,1234号，则C4...

(12分)已知在△ABC中，角A,B,C的对边分别为a,b,c,√3b=√3 acos C-csin A.(1)求A;(2)若A的角平分线交BC于点D,且AD=3,求△ABC面积的最小值，(12分)已知函数fw)=。a>0...

又H∈平面A1BC1,∴.点H在平面B1DDB与平面A1BC1的交D线上，B同理，点B,O在平面B,DDB与平面A1BC的交线上.HB,H,O三点共线.10.【解题分析】(1)记AC的中点为O,则O为圆心...

根据h0=t+在t∈片1]为减函数，在re[L,2]为增函数，且h(am=h0=2,h(m h()=h2)=5所以0∈2，，即2s2mS解得1m≤所以实数m的取值范围为几，子：(2)答案：「1-5,2W2解析：...

讲评三步一体高效训练记28.A.find outB.take onC.hand outD.pass on29.A.protectionB.recoveryC.benefitD.support30.A.pleasantB.necessaryC.meaningfulD.challe...

p(x)在[0，受)上单调递减，所以p(号)<p(0)=0,即sin1<2sin2,故C错误；令f(x)=xhx,所以f(x)=lnx+1,令f(x)>0,解得>。，令f(x)<0,解得0<<，所以f(x)在(0，)上单调递...

,,,When he heard the word"dumb",Louis felt like crying.The cob saw thathe had hurt Louis's feelings.(Adapted from "The Trumpet of the Swan"by Elwyn Br...

6l色97%☐111：55大同市高三上（摸.…试题+答案.pdf第1页共5页三A.0.19738B.0.00018C.0.01092D.0.098286.已知数列{a,}满足a1+a,=2n+3(n∈N),则a+a4=()A.2023.B.2024...

2023学年第一学期嘉兴八校期中联考高二年级数学试题(2023年11月)考生须知：1.本试题卷分选择题和非选择题两部分，共4页，满分150分，考试时间120分钟。2.答题前...

4.C。根据最后一段中Even if the attempt to develop a bird-based tsunami early warning systemfails,the project will still help scientists protect birds...

《双语学习报》2023一2024学年高二W版·新教材广东专版第15期测试题参考答案及部分解析第15期测试题参考答案1-5 ABACA6-10 BCCBB11-15 AABCB16-20 FBCEA21-25 BDA...

2023-2024学年上学期NGLISH第4期高二课标WEEKLY英语周報第24、26期报纸】(新教材)教师用报参考参考答案of rite that quite a few people my age had to1-5ABCAA6...

二·英语·读写新视济带7.but 8.stressful 9.to host 10.it11.determination12.gracefully13.strengthen 14.competition15.a二、阅读理解【素养导读】Pinaki Roy创...

八、词语运用disappoint,friend,helpful,pull,late,weA.请阅读下面短文，根据语篇内容，在空白处填relax,practice,record,see,shoulder,they入恰当的单词，使短...

第29期参考答案与解新第3版参考答案阅读理解A【素养导读】语篇类型：记叙文主题语境：人与自然语境内容：本文讲述了作者一行人探索丝绸之路的旅程。1.C推理判断...

C.Frank. 3.Where did the man go yesterday? A.The hotel. B.The office. C.The airport. 4.Why does the man need a map? A.To tour Manchester. B.To find a...

to make trouble?What was under that coat?What if he was a terrorist?But some higher born qualities held sway."Hi,"I said,walking over to him,"I'm Rick...

A.Share healthy eating tips. B.Teach people present to cook. C.Visit kids in poor communities. D.Ask the guests to donate money to charity. 26.Who cov...

anything,we would have expected it to increase fertility(生育)， not decrease it.The policy succeeded in promoting gender equality at home and in the...

12.How will the woman go to the supermarket? A.On foot. B.By taxi. C.By bus. 听第9段材料，回答第13至16题。 13.Where will the man spend his holiday? A....

with a material that would have been part of a real Spanish-style building.He made all the lights by hand.He also made many other household objects,li...

23.What can be done to make things better according to Mitter meier? A.Setting up reserves. B.Cancelling subsidies. C.Consuming less protein. D.Harves...

people's lives.I see in my family a 36 to connect with other people. I want my 37 to know the world and know real people in other areas of the world w...

【答案】36~40 DAECF

do something about it. M:I agree. (Text 7) W:I think the car we saw yesterday would be a good deal.What do you think? M:Yes,but I think you should ask...

D.The apps are partly to blame for failure of some delivery business. 35.What can be the best title for the text? A.A special app helping take orders...

<p>1、炎德英才大联考·长沙市一中2024届高三月考试卷(三)英语试题</p><br><p>习全围1®0所名接单元测试示范老教学札记coasts raising oysters (to help restore,o...