2024届金学导航答案网

5分)..(12分)lcos=cos,m选项中，有19【答案】1)证明见解析2)26分。]【解析】11.…11分)2(1)因为AC1/平面为a,ACc平面PAC5x55平面a∩平面为PAC=m,分)所以AC/1m,…(2分...

∴.CD2=CA·CM,∴.BD2=CA·CM.…………………………5分(2)解：如答图2，连接OD,OC,AD,MN⊥AC,∴.∠AMD=90°.∠CAD+∠ADM=90°..OA-OD,.∠BAD=∠ODA第19题答图2由(1)知∠BAD=∠CAD,.∠CAD=∠O...

000e00000020.(12分)6巴知菱形ACD的边长为6∠ADC=E为对角找AC上一点，AB=将△ABD沿BD某学校为了增进全体教职工对党史知识的年组组开展意史知识竞费活动并支都单翻...

令y=1,有n=(0,1,22λ),…10分C2:2√6(a-1)取面PCD的一个法向量m=(0,1,0),由C3:1n·mlcs(m,m)=n·m18以2三=解得入=或X-2(舍.…12分13P(C1-6a-1注：此题法向量赋值可参考...

The researchers call the device AsynchronousHo4D考查推理判断。综合全文可知，作者介绍人工“绍子新加坡研究人员开发出具有触觉的电子皮智能带来的好处，同时...

故CM⊥平面ADF,(4分)当n≥2时a,T.+=2(-vn可)4,AFC平面ADF,∴.CM⊥AF.(5分)n=1时，a1=2满足上式，(2)过C作CE⊥AB于点E,又因为BB,⊥平面故an=2(Wm-√n-1):(7分)ABC,所以BB...

绝密★启用前九年级教学质量检测学数注意事项：1.全卷满分120分，答题时间为120分钟。2请将各题答案填写在答题卡上。一、选择题（共8小题，每小题3分，计24分.每...

第6期总共有4种等可能的结果，其中球（2)将3个红球分别记作“红1”“红2版仍传到甲手中的结果有2种，2”“红3”，画树状图如下：2000(辆)在此直行的车辆数为5000x103.1...

三、填空题（本大题共4小题，每小题5分，共20分)13.已知随机变量X~B4,7则D(2X-1)=▲14.写出一条与直线2x+y+1=0平行且与圆x2+y2-4x-2y=0相切的直线方程▲415.已知数...

一覆蓝所有内容要点。第一部分应用了较多的语法结构和词汇。听力录音材料一一语法结构或词汇方而有些许错误，但为尽力使Text 1用较复杂结构或较高级词汇所致：具...

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糕，而处理这种事情的压力会让他们感到胸，要勇敢。当你害怕另一个人时，你可能恶心。)”可知，上文提到霸凌是一个大问并不觉得自己勇敢。但有时只要勇敢地行题，...

I've always believed there are two kinds of persons-the persons they are now,and the persons theycould become if they work hard with what they have.48...

第41期B1版Kes:(One possibleversion)1.because2.into3.After4.rainy5.to try6.making7.But8.Finally9.seventh10.an01.However2.excitemente3.of4.year's5.the b...

11.What is Cynthia's overall attitude towards life?A.Negative.B.Positive.C.Casual.12.When does Cynthia start work?A.At night.B.In the afternoon.C.In t...

高三数学注意事项：1.答题前，考生务必将自己的姓名、考生号、考场号、座位号填写在答题卡上，2.回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答...

9:11⊙A限令o8刀九数学.pdf●●●文件预览1/32023~2024学年第一学期九年级期中质量监测试题数学参考答案-、选择题1.B2.C3.D4.B5.B6.B7.C8.D9.D10.A二、填空题1.x=0,x...

"Should I go?I do have a lot of work to do."The question came from my daughter,Tracy,acollege senior,who was debating whether or not to go with her ro...

M:Excuse me,I'd like to apply for a library card.(11)W:But our books can only be borrowed by the students in our school.Do you have something likea st...

children under five years old are free!It is open from 7 am to 10 pm from Monday to Friday andfrom 8 am to 11 pm on weekends.So come and enjoy your fa...

《双语学习报》2023一2024学年高一W版·新教材天津专版第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 DACCD.6-10ACCAB11-15 BDBAD16-20 ACBDB21-25 CAD...

出最佳选项。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。听下面一段对话，回答第...

Extreme athletes are different:They feel in controlin dangerous situations.(47)A For example,skier Daron Rahlves says that being afraid makeshim try h...

CConservators and restorers have made continuous innovations in science and technologyapplications over the past few years in China to show cultural r...

M:You're welcome. (Text 8) W:Last year we got a suite during our annual trip to Vegas. Should we book a suite again? M:Maybe we should look into the p...

mazement.She said her team thought the rock powder might turn black in their experiments.However,it turned pink.An other researcher said,"Dr Gueneli c...

A.A manager. B.A sales clerk. C.An educator. 14.What was the most difficult part of the woman's previous job? A.Managing all the employees. B.Keeping...

B I still remember I was 11 years old when I asked my mom for piano lessons in 2010.We were in the fallout of the recession 济衰退).She said a polite“...

31.C本文讲述的是某些地区的鱼所面临的困境和人们对此现象 的所做所想，属于人与自然的话题，故本文最有可能来自杂志 的生态版块。

benefit of great 58.I should also thank her for finding my 59.It's remarkable how much power one good teacher can have in 60 the life of a child. 41.A...