云南省大理市下关第一中学2019~2020学年度高2021届高2018级高二3月份月考见面考英语试题

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云南省大理市下关第一中学2019-2020学年高二3月份月考(见面考)物理试题

云南省大理市下关第一中学2019-2020学年高二3月份月考(见面考)物理试题

下关一中2019-2020 学年高二年级下学期见面考物理试题试卷满分100分考试时间90分钟第I 卷(选择题共52分)一、单选题(本题共8小题,每题4 分,共32分)1.下列现象中,属于电磁感应现象的是A. 闭合线圈靠近磁铁时产生电流B. 通电线圈在磁场中受磁场作用力转动C. 磁铁吸引小磁针D. 小磁针在通电导线附近发生偏转2.一闭合矩形线圈绕垂直于磁场方向的轴匀速转动,产生的感应电流如图所示,由图可知A.该交流电电流的有效值是5 AB.该交流电的频率是20 HzC.t=0时刻线圈平面位于中性面D.该交流电电流的瞬时表达式为i=5cos 100πt(A)3.如图所示,一平行于光滑斜面的轻弹簧一端固定于斜面上,一端拉住条形磁铁,条形磁铁处于静止状态,磁铁中垂面上放置一通电导线,导线中电流方向垂直纸面向里且缓慢增大,下列说法正确的是A.弹簧弹力逐渐变小B.弹簧弹力先减小后增大C.磁铁对斜面的压力逐渐变小D.磁铁对斜面的压力逐渐变大4.如图所示的装置中,木块B与水平桌面间的接触是光滑的,子弹A沿水平方向射入木块后留在木块内,将弹簧压缩到最短.现将子弹、木块和弹簧合在一起作为研究对象(系统),则此系统在从子弹开始射入木块到弹簧压缩至最短的整个过程中( )A.动量守恒、机械能守恒B.动量不守恒、机械能不守恒C.动量守恒、机械能不守恒D.动量不守恒、机械能守恒5.(4分)下列说法中,正确的是:()QA.公式C =U,其中电容器的电容C与电容器两极板间电势差U 无关B.由E = Fq可知电场中某点的电场强度E与q成反比C.由ab = Ed 可知,匀强电场中的任意两点a、b 间的距离越大,则两点间的电势差也一定越大UD.由公式ϕ =EPq可知电场中某点的电势ϕ 与q成反比6.如图所示,有一闭合的等腰直角三角形导线ABC,若让它沿BA的方向匀速通过有明显边界的匀强磁场,从图示位置开始计时,在整个过程中,线框内的感应电流随时间变化的图象应是图中的(场区宽度大于直角边长,以逆时针方向为正)()A.B.C.D.7.如图所示,竖直平面内有水平向左的匀强电场E,M点与P点的连线垂直于电场线,M点与N在同一电场线上.两个完全相同的带等量正电荷的粒子,以相同大小的初速度v0分别从M点和N点沿竖直平面进入电场,重力不计.N点的粒子垂直电场线进入,M点的粒子与电场线成一定夹角进入,两粒子恰好都能经过P点,在此过程中,下列说法正确的是A.电场力对两粒子做功相同B.两粒子到达P点的速度大小可能相等C.两粒子到达P点时的电势能都减小D.两粒子到达P点所需时间一定不相等8.如图所示,两个线圈套在同一个铁芯上,线圈的绕向如图甲所示,左线圈连着正方形线框abcd,线框所在区域存在变化的磁场,取垂直纸面向外为正,磁感应强度随时间变化如图乙所示,不计线框以外的感生电场,右侧线圈连接一定值电阻R,下列说法中正确的是A.设t1、t3时刻ab边中电流大小分别为i1、i3,则有i1<i3,定值电阻R中有电流B.t3~t4时间内通过ab边电量为0,定值电阻R 中无电流C.t1时刻ab边中电流方向由a→ b,e 点电势高于f点D.t 时刻ab边中电流方向由b→ a,f点电势高于e 点第 2 页5二、多选题(本题共5小题,每题 4 分,共 20分)9.如图所示,一根很长的、不可伸长的柔软轻绳跨过光滑定滑轮,绳两端系着三个小球 A 、B 、C,系统保持静 止,A 球质量为 m ,B 球的质量为2m ,C 球离地面高度为h 。

云南省大理市下关第一中学2019-2020学年高二上学期期末英语试题(解析版)

云南省大理市下关第一中学2019-2020学年高二上学期期末英语试题(解析版)

下关一中2019〜2020学年高二年级上学期期末考英语试题试卷满分150分时间120分钟本试卷分第I卷(选择题)和第II卷(非选择题)两部分。

第I卷第一部分听力(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,三个选项中选出最佳选项,并标在试卷相应的位置。

听完每段对话后,你都有10秒的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1. Where is the man going this weekend?A. To his new friend's garage.B. To the cafeteria.C. To a music show.2.What is true about the cafe?A. It has free Wi-Fi.B. It has an official website.C. The second cup of coffee is free.3.What happened to the man today?A. He got sick.B. He spilled coffee on his suit.C. He got stuck in traffic.4.When did the man get home?A. At one o'clock in the morning.B. At two o'clock in the morning.C. At three o'clock in the morning.5.How does the woman feel?A. She's sorry.B. She's angry.C. She feels bad for the man.第二节:(共15小题;每题1・5分,满分22. 5分)听下面5段对话或独白。

云南省大理市下关第一中学2019-2020学年高二上学期段考(会考模拟)数学试题及答案

云南省大理市下关第一中学2019-2020学年高二上学期段考(会考模拟)数学试题及答案

(1)(2)(3)高二数学参考答案 第1页 共2页下关一中2019~2020学年高二年级上学期段考数学参考答案一、选择题:本大题共19个小题,每小题3分,共57分. 题号1 2 3 4 5 6 7 8 9 10 答案D B C B A C A C D D 题号11 12 13 14 15 16 17 18 19 答案 A A D D C B C A A二、填空题:本大题共4个小题,每小题4分,共16分.20.(1)2 (2)±3 (3)5 (4)45°三、解答题:本大题共4个小题,共27分.21.(本小题满分5分)解:(1)∵a 2=b 2+c 2+bc ,∴根据余弦定理,得2221cos 22b c a A bc -+==- ∵0<A <π,∴A =23π (2)由正弦定理sin sin a b A B=,得1sin sin 2b B A a == ∵A =23π,0<B <π,∴B = 6π. 可得()=6C A B ππ=-+ ∴B =C ,可得c =b =222.(本小题满分7分)解:(1)∵圆C :x 2+y 2-4x -6y +12=0(x -2)2+(y -3)2=1. ∴圆心为(2,3),半径为1. 当切线的斜率存在时,设切线的斜率为k ,则切线方程为kx -y -3k +5=0, 1=,∴k =34,∴切线方程为:3x -y +11=0; 而点(3,5)在圆外,∴过点(3,5)做圆的切线应有两条,当切线的斜率不存在时,另一条切线方程为:x =3.(2)AO =经过A 点的直线l 的方程为:5x -3y =0,故d =, 故1122S d AO =⋅=高二数学参考答案 第2页 共2页 23.(本小题满分7分)(1)证明:∵三棱柱ABC -A 1B 1C 1中,侧棱与底面ABC 垂直,∴AB =AA 1,∵AB =AA 1=1,∴四边形ABAA 1是正方形,∴AB 1⊥A 1B , ∵AB 1⊥BC 1,BC 1∩A 1B =B ,∴AB 1⊥平面A 1BC 1, ∵A 1C 1⊂平面A 1BC 1,∴AB 1⊥A 1C 1.(2)解:∵AB 1⊥A 1C 1,∴AB 1⊥AC 又BB 1⊥AC ,AB 1∩BB 1=B 1,∴AC ⊥平面ABAA 1,∴AC ⊥AB ,∴A 1C 1⊥AB , 作A 1H ⊥AC 1于H∵AB ⊥平面A 1C ,∴AB ⊥A 1H∵AC 1∩AB =A ∴A 1H ⊥平面ABC 1,过A 1作A 1E ⊥BC 1于E ,∵11111 22A H AC A AC A ⋅=⋅,∴A 1H =11A A AC AC ⋅. ∴点A 1到平面ABC 1.24.(本小题满分8分)解:(1)∵公比小于零的等比数列{a n }的前n 项和为S n ,且a 2=-1,S 3=3a 3, ∴a 2=a 1q =-1,S 3=a 1+a 2+a 1q 2=3a 1q 2∴解得q =12-,或q =1(舍).a 1=2 ∴a n =1122n -⎛⎫⋅- ⎪⎝⎭.(2)∵数列{b n }满足b n =a n +2n -1, ∴T n =b 1+b 2+b 3+…+b n=(a 1+1)+(a 2+3)+(a 3+5)+…+[a n +(2n -1)] =(a 1+a 2+a 3+…+a n )+[1+3+5+…+(2n -1)] =11212112n -⎡⎤⎛⎫⨯--⎢⎥ ⎪⎝⎭⎢⎥⎣⎦⎛⎫-- ⎪⎝⎭+()1212n n +-⎡⎤⎣⎦ = 241132n n ⎡⎤⎛⎫--+⎢⎥ ⎪⎝⎭⎢⎥⎣⎦。

云南省大理市下关第一中学2019-2020学年高二上学期期末考试数学试题

云南省大理市下关第一中学2019-2020学年高二上学期期末考试数学试题

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高二数学参考答案 第3页 共4页
高二数学参考答案 第4页 共4页
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下关一中 2019~2020 学年高二上学期期末考试
数学参考答案
一、选择题
题号 1
2
3
4
5
6
7
8
9
10
答案 B
A
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C
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题号 11
12
答案 D
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二、填空题 13、(1) 5 π (2)-5 (3)2x+2y-3=0 (4)1
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三、解答题
14、解:(1) 由题


∵A∈(0,π),∴A= 2π , 3
(2)∵A= 2π ,DC=2BD=2,b=AC= 3 ,可得:a=BC=3, 3
∴由余弦定理 a2 = b2 + c2 − 2bc cos A ,可得:c2+ 3 c-6=0,
∴解得:c= 3 (负值舍去),
∴cosC= a2 + b2 − c2 = 3 ,
2ab
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∴△ADC 中,由余弦定理可得:AD= AC2 + CD2 − 2AC ?CD • cosC =1.
16、
17、(1)证明:取 AB 的中点 O,连接 OP,OD,BD,
∵△PAB 是等边三角形,∴PO⊥AB, 又∵四边形 ABCD 是菱形,∠BAD=60°, ∴△ABD 是等边三角形, ∴DO⊥AB, ∵PO∩DO=O,PO,DO⊂平面 POD, ∴AB⊥平面 POD, ∵PD ⊂平面 POD, ∴AB⊥PD.

2019-2020学年 云南省大理市下关第一中学 高二4月份月考(见面考)英语试题 Word版

2019-2020学年  云南省大理市下关第一中学  高二4月份月考(见面考)英语试题 Word版

下关一中2019-2020学年高二年级下学期见面考英语试卷试卷满分150 考试时间120分钟注意事项:1.答题前,考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚。

2.每小题选出答案后,用 2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

在试卷卷上作答无效。

3.考试结束后,将答题卡交回。

第一部分听力(共两节,满分30分)注意,听力部分答题时,请先将答案标在试卷上。

录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

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三个选项中选出最佳选项。

听完每段对话后,你都有 10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.W hen did the man enter the People’s University?A. One year ago.B. Two years ago.C. Three years ago.2.W hat do we learn from the conversation?A.The man had hurt the woman’s feelings.B.T he woman rejected the man’s apology.C.T he man had forgotten the whole thing.3.W hat will the woman probably do?A. Water the plants.B. Wash the car.C. Do nothing.4.W hat can we learn from the conversation?A.The man doesn’t like pop music.B.T he woman doesn’t like pop music.C.T he woman is quite young.5.W hy does the woman refuse to lend the man her bag?A.She doesn’t have a bag but a basket.B.S he has to use it to carry some books.C.S he has many things in it.第二节(共15小题,每小题1.5分,共计 22.5分)听下面5段对话或独白。

云南省大理市市下关第一中学2019-2020学年高二英语联考试卷含解析

云南省大理市市下关第一中学2019-2020学年高二英语联考试卷含解析

云南省大理市市下关第一中学2019-2020学年高二英语联考试卷含解析一、选择题1. Now that the banks are back on their feet, we expect the extraordinary______ from them to help rebuild the economy.A. categoryB. commitmentC. componentD. competence参考答案:B【详解】考查名词。

A. category 种类; B. commitment承诺,保证; C. component成分,组件; D. competence能力,胜任。

句意:现在银行已经恢复了元气,我们希望他们能做出非凡的承诺,帮助重建经济。

结合句意可知答案为B。

2. It is good ______ for an Arab to stand ______ to his friend when they are talking.A. manners; closeB. manner ; closeC. manners ; closelyD. manner; closed参考答案:A3. A quarrel________, which made him________his family.A. was broken out; break awayB. broke out; break away fromC. was broken away; break downD. broke down; break out参考答案:B4. In a good marriage, both husband and wife work hard to solve any problemsthat____________.A. ariseB. riseC. arouseD. raise参考答案:A考查动词辨析。

云南省大理市下关第一中学2019-2020学年高二英语3月月考(见面考)试题答案

云南省大理市下关第一中学2019-2020学年高二英语3月月考(见面考)试题答案

21第一部分听力(共两节,每题1.5分.满分30分)1~5 AACBC 6~10 CBBCA 11~15 ABABC 16~20 CACAB第二部分阅读理解(共两节,每小题2分,满分40分)~25BDADC 26~30ABADD 31~35CBCAB 36~40 EAGCD 第三部分语言知识运用(共两节,满分45分)第一节 完型填空.每题1.5分,满分30分41. D 42. C 43. C 44. B 45. A 46. C 47. D 48. C 49. A50. B 51. D 52. A 53. B 54. D 55. A 56. C 57. B 58. D59. A 60. B 第二节 语法填空 每题1.5分,满分15分61.taken 62. which/that 63. as 64. the65. have become66.reasons 67. Actually 68. were caused 69. to use 70. or 第四部分 写作 (共两节,满分35分)第一节.改错,10分.(1)A nything ----everything (2)去掉in (3)hold ----held (4)deliver a speech (5)was----is(6)after that -----after which ( and after that)(7)performances (8)We----You (9)definitely.(10)why not to ---why not 第二节书面表达(满分25分)My dear teachers and fellow students,How time flies! I ’m Li Hua,it ’s my great honour to stand here to give a farewell speech. Now it is really hard to put my feelings into words.First of all, we really ha ve had a wonderful time with you in the past two weeks in the cultural exchange activity. Not only have we shared our cultural differences but we also made a great many friends . Furthermore, we are grateful for what our dear teachers have done for us. It is they who gave us their precious time, energy and love to make the activity go smoothly. Finally, though we are s oon to depart, it is not the end. Good memories and our friendship will last forever.On behalf of all the students present here, let me express our sincere wishes to all teachers and students.Hope there will be more events of this kind in the near future .Thank you !下关一中2019-2020学年高二年级下学期见面考英语参考答案。

云南省大理市下关第一中学2019-2020学年高二英语3月月考(见面考)试题

云南省大理市下关第一中学2019-2020学年高二英语3月月考(见面考)试题

云南省大理市下关第一中学2019-2020学年高二英语3月月考(见面考)试题下关一中2019-2020学年高二年级下学期见面考英语试卷试卷满分150 考试时间120分钟注意事项:1.答题前,考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚。

2.每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

在试卷卷上作答无效。

3.考试结束后,将答题卡交回。

第一部分听力(共两节,满分30分)注意,听力部分答题时,请先将答案标在试卷上。

录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

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三个选项中选出最佳选项。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.Wh en did the man enter the People’s University?A. One year ago.B. Two years ago.C. Three years ago.2.What do we learn from the conversation?A.The man had hurt the woman’s feelings.B.The woman rejected the man’s apology.C.The man had forgotten the whole thing.3.What will the woman probably do?A. Water the plants.B. Wash the car.C. Do nothing.4.What can we learn from the conversation?A.The man doesn’t like pop music.B.The woman doesn’t like pop music.C.The woman is quite young.5.Why does the woman refuse to lend the man her bag?A.She doesn’t have a bag but a basket.B.She has to use it to carry some books.C.She has many things in it.第二节(共15小题,每小题1.5分,共计22.5分)听下面5段对话或独白。

云南省大理市下关第一中学2019-2020学年高二上学期期中考试语文试题

云南省大理市下关第一中学2019-2020学年高二上学期期中考试语文试题

下关一中2019~2020学年高二年级上学期期中考语文试题试卷满分150分考试时间 150分钟一、现代文阅读(共35分)(一)论述类文本阅读(共9分)阅读下面的文字,完成下列各题。

苏轼是中国后期封建社会文人们最喜爱的对象,其实,苏轼的文艺成就本身并不算太高,比起屈、陶、李、杜要逊色一筹。

然而他在中国文艺史上却有巨大影响,是美学史的重要人物,道理在哪里呢?我认为,他的典型意义在于他把进取与退隐的矛盾双重心理发展到一个新的质变点。

苏轼一方面忠君爱国,学优则仕,抱负满怀,谨守儒家思想,无论是他在熙宁变法中的温和保守立场,还是其他许多言行,都表现出这一点。

这上与杜、白、韩,下与后代无数士大夫知识分子均无不同。

但苏轼留给后人的主要形象并不是这一面,而恰好是另一面。

这另一面才是苏轼之所以为苏轼的关键所在。

苏轼一生并未退隐,也从未真正归田,但他通过诗文所表达出来的那种人生空漠之感,却比前人任何口头上或事实上的退隐遁世要更深刻更沉重。

因为,苏轼诗文中所表达出来的这种退隐,已不只是对政治的退避,而且是一种对社会的退避;它不是对政治杀戮的恐惧哀伤,而是对整个人生纷扰的目的和意义这个根本问题的怀疑、厌倦和企求解脱与舍弃。

这当然比前者又要深刻一层了。

前者是可能做到的,后者实际上是不可能做到的。

如果说《春江花月夜》之类的对人生的自我意识只是少年时代的喟叹,虽说感伤,并不觉重压,那么苏轼的情况就刚好相反,尽管没有多谈,却更感沉重。

这种整个人生空漠之感,这种对整个存在、宇宙、人生、社会的怀疑、厌倦、无所希冀、无所寄托的深沉喟叹,尽管不是那么自觉,却是苏轼最早在文艺领域中把它充分透露出来的。

正是这种对整体人生的空幻淡漠感,求超脱而未能,欲排遣反戏谑,使苏轼奉儒家而出入佛老,谈世事而颇作玄思,于是,行云流水,初无定制,嬉笑怒骂,皆成文章。

苏轼在美学上追求的是一种朴质无华、平淡自然的情趣韵味,一种退避社会、厌弃世间的人生理想和生活态度,反对矫揉造作和装饰雕琢,并把这一切提到某种透彻了悟的哲理高度。

云南省大理市下关第一中学2019-2020学年高二上学期期末语文试题

云南省大理市下关第一中学2019-2020学年高二上学期期末语文试题

下关一中2019~2020学年高二年级上学期期末考语文试题试卷满分150分考试时间150分钟一、现代文阅读(共33分)(一)论述类文本阅读(共9分)阅读下面的文字,完成下列小题。

据《论语》记载,孔子很少言及“利”的问题,偶或有之,也常常与“义”对举。

例如为人们所熟知的“君子喻于义,小人喻于利”“不义而富且贵,于我如浮云”等。

在他的影响下,后世儒家将义利之辨看作一个重要问题,重义轻利成为儒家思想的基本倾向。

孔子所生活的春秋末期,“义”由对君主品行的要求,演变为君子的道德规范和行为法则。

与前人相比,孔子及其门人在使用“义”这一概念时,有如下几个特点:第一,强调“义”对于个人道德行为的重要性。

这里的个人,主要是君子,一般指士及士以上阶层中的个体。

第二,在君臣关系层面,突出臣下这一方面的“义”。

这并不是说,孔子把君臣关系看作一方对另一方单向的、绝对的服从。

因为孔子明确讲过:“君使臣以礼,臣事君以忠。

”如果将君主看作贵族阶层的一个成员,则君主也要讲“义”,所谓“上好义,则民莫敢不服”。

“使臣以礼”为君主之“义”;“事君以忠”为臣下之“义”。

只不过,孔子从个体的内省精神出发,更多地强调作为臣下的君子,应该尽自己能力“事君尽礼”“务民之义”。

在这个意义上,“忠”和“义”就统一起来。

到了后世,臣下之“义”完全被单向的、绝对的“忠”所取代。

第三,从现代哲学的角度看,作为抽象的价值标准,《论语》中的“义”虽然也具有“公正”等含义,但在多数情况下,却只有形式意义而无内在规定性。

例如,“君子义以为上”,就是君子应该让自己的行为具有正当性,否则其他的好品质都将失去依据。

但什么是“正当性”,在不同语境、不同条件下,具体答案和标准又是不一样的。

也就是说,在任何情况下遭遇到任何事,凡是处理得当的,都可以叫做“义”。

尽管在孔子之前,义利关系问题已经进入人们的视野,但到了孔子那里,义利才真正对举而言,并且具有了对立的意味。

最著名的莫过于《论语·里仁》篇中的“君子喻于义,小人喻于利”。

2019-2020学年云南省大理市下关第一中学高二上学期期末考试数学试题

2019-2020学年云南省大理市下关第一中学高二上学期期末考试数学试题

2019-2020学年云南省大理市下关第一中学高二上学期期末考试数学试题一、单选题1.已知集合{}2430x x x A -+≥=,{}22x x B =-≤≤,则A B =I ( ). A .[2,3] B .[2,1]-C .[1,2]D .[2,3]-【答案】B先求集合A ,再求A B I .解:{|3A x x =…或1}x „,[]2,1A B =-I ∴. 故选:B.点评:本题考查集合的运算,属于简单题型.2.已知x ∈R ,则条件“11x -<”是条件“24x <”的( ) A .充分不必要条件 B .必要不充分条件 C .充要条件 D .既不充分也不必要条件【答案】A先将题干中的不等式的解求出,再利用充分条件、必要条件的概念判断即可. 解:由11x -<得02x <<,由24x <得22x -<<,根据充分条件、必要条件的概念可知02x <<是22x -<<的充分不必要条件. 故选:A.点评:本题主要考查充分条件、必要条件的概念的应用,属基础题.3.()f x 是奇函数,当0x ≥时,2()log (2)1f x x =+-,则()2f -=( ) A .2 B .1 C .-2 D .-1【答案】D根据奇函数对称性特点进行求解即可解:()f x Q 是奇函数,()()22f f ∴-=-,当2x =时,2(2)log (22)11f =+-=,()()221f f ∴-=-=-故选:D点评:本题考查奇函数具体函数值的求法,奇函数的对称性,属于基础题4.已知随机变量ξ服从正态分布2(2,)N σ,且(4)0.8P ξ<=,则(02)P ξ<<=( ). A .0.2 B .0.3C .0.4D .0.6【答案】B∵随机变量x 服从正态分布2(2,)N σ,2μ=,即对称轴是2,(4)0.8P ξ<=,∴(4)(0)0.2P P ξξ≥=<=, ∴(04)0.6P ξ<<=, ∴(02)0.3P ξ<<=. 故选B .5.已知角α的顶点在坐标原点,始边与x 轴的非负半轴重合,312P ⎛⎫⎪ ⎪⎝⎭为其终边上一点,则sin 2πα⎛⎫+=⎪⎝⎭( ) A .3B .12-C .12D 3 【答案】A首先根据题中所给的角的终边上的一点P 的坐标,利用三角函数的定义,求得其余弦值,用诱导公式将式子进行化简,求得最后的结果. 解:因为31()22P -在角α的终边上, 所以3122x y =-=,从而求得1r =,所以cos 2α=-,而sin()cos 2παα+==, 故选A.点评:该题考查的是有关三角函数求值问题,涉及到的知识点有三角函数的定义,诱导公式,正确使用公式是解题的关键.6.在等差数列{}n a 中,24639a a a ++=,161127a a a ++=,则数列{}n a 的前9项的和等于( ). A .297 B .144C .99D .66【答案】C根据等差数列的性质可求出4a 和6a 的值,代入等差数列求和公式即可求出9S .解:因为:2464161163=393=27a a a a a a a a ++=⎧⎨++=⎩,解得:46=13=9a a ⎧⎨⎩.194699()9()9(139)99222a a a a S ++⨯+==== 故选:C点评:本题主要考查等差数列的性质和求和公式,熟记性质和公式是解决本题的关键,属于简单题.7.若变量x ,y 满足约束条件1122x y x y x y +≥⎧⎪-≥-⎨⎪-≤⎩,则目标函数2z x y =-的最小值为( )A .1B .-2C .-5D .-7【答案】C画出可行域,向上平移基准直线20x y -=到可行域边界位置,由此求得目标函数的最小值.解:画出可行域如下图所示,向上平移基准直线 20x y -=到可行域边界()3,4A 的位置,由此求得目标函数的最小值为3245z =-⨯=-. 故选:C.点评:本小题主要考查利用线性规划求目标函数的最小值,考查数形结合的数学思想方法,属于基础题.8.如图,在正方体1111ABCD A B C D -中,E 为线段11A C 的中点,则异面直线DE 与1B C 所成角的大小为( )A .15oB .30oC .45oD .60o【答案】B建立空间直角坐标系,先求得向量1,DE B C u u u v u u u v的夹角的余弦值,即可得到异面直线所成角的余弦值,得到答案.解:分别以1,,DA DC DD 所在的直线为,,x y z 建立空间直角坐标系, 设正方体的棱长为2,可得1(0,0,0),(1,1,2),(2,2,2),(0,2,0)D E B C ,所以1(1,1,2),(2,0,2)DE BC ==--u u u v u u u v , 所以1113cos ,622DE B C DE B C DE B C⋅===⨯⋅u u u v u u u vu u u v u u u v u u u v u u u v 所以异面直线DE 和1B C 3所以异面直线DE 和1B C 所成的角为30o ,故选B.点评:本题主要考查了异面直线所成角的求解,其中解答中建立适当的空间直角坐标系,利用向量的夹角公式求解是解答的关键,着重考查了推理与运算能力,属于基础题.9.()26112x x x ⎛⎫+- ⎪⎝⎭的展开式中,含2x 的项的系数是()A .-40B .-25C .25D .55【答案】B写出二项式61x x ⎛⎫- ⎪⎝⎭的展开式中的通项,然后观察含2x 的项有两种构成,一种是()212x +中的1与61x x ⎛⎫- ⎪⎝⎭中的二次项相乘得到,一种是()212x +中的22x 与61x x ⎛⎫- ⎪⎝⎭中的常数项相乘得到,将系数相加即可得出结果。

【全国百强校】云南省大理市下关一中2019~2020学年高二年级上学期段考(1) 物理参考答案

【全国百强校】云南省大理市下关一中2019~2020学年高二年级上学期段考(1) 物理参考答案

下关一中2019~2020学年高二年级上学期段考(1)物理参考答案三、实验题14、(1)B C 甲(2)实物电路图如图所示(3)5.2【分析】(1)合理选择实验器材,先选必要器材,再根据要求满足安全性,准确性,方便操作的原则选择待选器材。

电流表的接法要求大电阻内接法,小电阻外接法.滑动变阻器是小电阻控制大电阻,用分压式接法。

(2)根据电路图来连接实物图,注意电表的正负极,并分几个回路来连接;(3)由电压表与电流表读数,依据,即可求解。

考查如何选择仪器,掌握选择的方法与原则;学会由电路图去连接实物图,注意电表的正负极;对电表读数时要先确定其量程与分度值,然后再读数,读数时视线要与电表刻度线垂直。

【解答】(1)因电源的电压为4V,因此电压表选择3V量程;由于阻值约为5Ω的电阻R x的,根据欧姆定律可知,电流的最大值为0.8A,从精确角来说,所以电流表选择0.6A的量程;根据待测电阻的阻值与电压表及电流表的阻值,可知,待测电阻的阻值偏小,因此选择电流表外接法,故选择甲图。

(2)根据电路图来连接实物图原则,注意电表的正负极,并分几个回路来连接,如图所示;(3)电压表的读数为U=2.60V;电流表的读数为I=0.50A;电阻阻值:;15、(1)52.30;(2)4.300;(3)①A1;②R2。

【分析】(1)游标卡尺读数时要分成整数部分和小数部分两部分来读,不需要估读;(2)螺旋测微器读数时,也要分成整数部分和小数部分两部分来读,注意“半毫米刻度线”是否露出,需要估读;(3)通过估算电路中的最大电流来选择电流表量程;根据要求“测得多组数据”可知.变阻器应采用分压式接法,应选择阻值小的变阻器方便调节.根据满足可知,电流表应用外接法;应掌握游标卡尺与螺旋测微器的读数方法.通过估算电路中的最大电流来选择电流表的量程;若有“测得多组数据”要求或要求电流从零调时,变阻器应用分压式接法,选择阻值小的变阻器时方便调节。

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下关一中2019-2020学年高二年级下学期见面考英语试卷试卷满分150 考试时间120分钟注意事项:1.答题前,考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚。

2.每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

在试卷卷上作答无效。

3.考试结束后,将答题卡交回。

第一部分听力(共两节,满分30分)注意,听力部分答题时,请先将答案标在试卷上。

录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

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三个选项中选出最佳选项。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.When did the man enter the People’s University?A. One year ago.B. Two years ago.C. Three years ago.2.What do we learn from the conversation?A.The man had hurt the woman’s feelings.B.The woman rejected the man’s apology.C.The man had forgotten the whole thing.3.What will the woman probably do?A. Water the plants.B. Wash the car.C. Do nothing.4.What can we learn from the conversation?A.The man doesn’t like pop music.B.The woman doesn’t like pop music.C.The woman is quite young.5.Why does the woman refuse to lend the man her bag?A.She doesn’t have a bag but a basket.B.She has to use it to carry some books.C.She has many things in it.第二节(共15小题,每小题1.5分,共计22.5分)听下面5段对话或独白。

每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项, 并标在试卷的相应位置。

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。

听第6段材料,回答第6至7题。

6.Who skates best according to this conversation?A. William.B. Mary.C. John.7.What does Mary advise William to do before skating?A.To borrow a pair of skates from his friend.B.To rent a pair of skates from the sports shop.C.To buy a pair of skates from the sports shop.听第7段材料,回答第8至10题。

8.Why was the man late for work?A. He got up late.B. Due to the heavy traffic.C. He didn’t catch the bus.9.What can we know from the dialogue?A.A car pool is a kind of organization that owns cars and sends people to work.B.Car pool is the name of a company that helps people hire cars.C.People who join a car pool live nearby and ride in one car.10.How does the woman know so much about the car pool?A. She has joined a car pool.B. She has read about it in the paper.C. She works in it. 听第8段材料,回答第11至13题。

11.What’s the relationship between the two speakers?A. They are strangers.B. They are classmates.C. They are teacher and student.12.How many buses are there altogether?A. 2.B. 3.C. 4.13.How long does the woman have to wait for the bus?A. 20 minutes.B. 30 minutes.C. 40 minutes.听第9段材料,回答第14至16题。

14.Where did the man live before?A.In Oak Creek apartments.B.In a student dorm.C. In a house he rented.15.Where do two of the man’s roommates come from?A. Italy and Japan.B. Hong Kong and America.C. Brazil and Japan.16.What do we know about the woman?A. She is friendly.B. She likes to cook.C.She wants to meet the man’s roommates.听第10段材料,回答第17至20题。

17.When does the woman give the weather forecast?A. In the morning.B. In the afternoon.C. In the evening.18.What temperature will San Diego have?A. 65 degrees.B. 69 degrees.C. 78 degrees.19.What will the weather be like in Oklahoma City?A. Sunny but windy.B. Cloudy and warm.C. Rainy and cold.20.Where will it be the coldest?A.In Toronto.B.In Montreal.C.In New York.第二部分阅读理解(共两节,满分40分)第一节 (共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的A、B、C和D 四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

AThe New Year is just around the corner! For many in the UK, if the New Year means anything, it means making a fresh-new start and turning over a new leaf. And to do this, many of us make New Year’s resolutions(决心) – a list of ways that we intend to improve ourselves in the year ahead. We reflect on our past faults and resolve not to do them again. Quitting smoking is ever popular, as is a vow(誓言)to take up more exercise or spend more time with family. But where does the idea of a New Year’s resolution come from?The answer might lie 4,000 years ago in ancient Babylonia, according to . The Babylonians are believed to be the first to hold recorded celebrations for the New Year. The 12-day-long celebration, Akitu, allowed them not only to reaffirm(重申) their loyalty to the king, or crown a new one, but also to promise to the gods to pay their debts and return borrowed objects. For their “good behaviors”, they believed the gods would bestow (恩赐) favor upon them for the year to come. If not, there would be consequences(承担责任) to take.The Romans had similar traditions, too. New Year’s Day was a time when senators (参议员) would swear they had upheld the laws and city leaders and soldiers would take an oath (誓言) of loyalty to the emperor. Incidentally, the month of January, is named after the Roman god Janus. He is the god of beginnings and transitions of time and is described as having two faces – one looking to the past and the other facing forwards the future.The Romans may be long gone, but their culture lives on. Whether you’re seeking for a quick behavioral adjust ment, or a huge personality change, you’re taking part in a tradition that dates back to centuries ago. Here comes the turn of the year, and our eyes turn inwards. We look at self-improvement, review o ur past mistakes, confess (忏悔) our wrong doings, seek atonement (弥补) and try to sharpen up(思考) in general. Eventually, much like the Babylonians and Romans, we seek to reaffirm the best parts of ourselves, while leaving the past behind.I wish you all the best, sticking to(坚持) your resolutions. Wish everyone an early Happy New Year!21.What can be inferred about the New Year in the passage?A.New Year’s resolutions are nothing more than quit smoking.B.New Year is always associated with(与….有关) starting a brand new life.C.Many people make New Year’s resolutions only to regret their past behaviors.D.The idea of making New Year’s resolutions dates back to the birth of mankind.22.What do we know about the ancient traditions to celebrate the New Year?A.The Babylonians celebrated the New Year for the first 12 days in February.B.The Romans would all swear that they had upheld the laws on New Year’s Day.C.The Romans were convinced that they would take severe consequences for their oaths.D.The Babylonians believed good behaviors during Akitu would bless them with good favor.23.What is one of the purposes of New Year’s resolutions for people of both ancient and modern times?A.To revise(改正) past mistakes and improve future self.B.To ask for gods’ favor on themselves for the new year.C.To pass down the precious traditions of human civilization.D.To confess their wrong doings and ask for gods’ forgiveness.BDear friends,I am Peng Liyuan, the WHO Goodwill Ambassador(友好大使) for TB (结核病) and HIV/AIDS. Congratulations on this High-Level Meeting, and greetings to you all!I became China’s Ambassador for TB in 2007, and the Goodwill Ambassador in 2011. It is a mission(使命) and responsibility I cherish(珍惜) dearly. For more than ten years, every year on March 24th, I’ve visited com munities with high TB prevalence(盛行) to help people raise awareness, change behavior and encourage actions.This year, I went to Hubei in central China. I shared with teenage students important TB-related knowledge, and ways to lead a healthy lifestyle and taught young children the importance of good personal hygiene(卫生)...On this trip, I also attended a ceremony to recognize outstanding TB campaigners. Most of them work at the grassroots and have great stories to share.I also wish to thank the media and our active supporters. Together with more than 700,000 volunteers in China’s TB programs, we have helped promote awareness, provide valuable knowledge and improve the understanding of TB to more than 75% of the population. Lives have been saved as a result.I myself stand witness(见证) to the rapid progress of TB programs in China. Thanks to better medical service, we can offer more timely and effective diagnosis(诊断)and treatment. In some areas, fighting TB is now an important part of the poverty reduction programs. Case detection rate increases, more patients are cured, and the incidence(发病) and mortality (死亡)continue to drop.It is the united effort of governments, international organizations, NGOs, experts and volunteers that has made this possible. However, daunting challenges remain. MDR(多重耐药菌) is still a major threat. Limited ways of treatment and insufficient funding are still the problems we face globally. The WHO has adopted the “End TB Strategy”. Now is the time to act. I call upon all of you to join us. Together, let us make a difference to the lives of millions affected, and stop tuberculosis (TB).I wish this meeting a great success. Thank you.24.The following statements about Peng Liyuan are TRUE EXCEPT that ___________ .A.she was appointed to be China’s Ambassador for TB in 2007B.she was the Goodwill Ambassador for TB and HIV/AIDS in 2011C.she is devoted to helping people raise their awareness of TB and encouraging actionsD.she has visited communities of high HIV/AIDS prevalence for more than 10 years25.What can we learn about China’s TB programs from the passage?A.They have improved the knowledge of TB for all Chinese.B.They have helped cure more than 75% of the TB patients.C.They have made rapid progress with better medical service.D.There are more than 700,000 TB volunteers in Hubei Province.26.What does the underlined word “daunting” probably mean in Paragraph 6?A. Dreadful (可怕的)B. DesperateC. DependentD. Disappointed27.What are Peng’s attitudes towards current world’s TB situation?A. Critical and disapproving.B. Concerned and optimistic.C. Worried and disappointed.D. Unsatisfied and indifferent.CImagine looking up to gaze at the moon on a clear summer night, only to see the sky full of twinkling advertising billboards(广告). That’s the future pictured by the Russian company StartRocket, which plans to launch billboard satellites into low-Earth orbit as early as 2021.“We are ruled by brands(品牌) and events,” StartRocket project leader Vlad Sitnikov told Futurism, “the Super Bowl, Coca Cola, Supreme, Brexit, the Olympics, FIFA; you name it. The economy is the blood system of society. Entertainment and advertising are at its heart. We will live in space in the future, and humankind will start delivering its culture to space. The more professional and experienced pioneers will make life better for ever yone.”However, not everyone agrees that having enormous billboard-style advertisements in the night sky will be good for mankind. Experts have argued that the bright ad banners (标语) could influence the ability to do astronomical research from the ground, or that those satellites will eventually become space junk and potentially affect more significant space activity or threaten aviation safety.Sitnikov doe sn’t seem to be bothered about the criticism his company’s project has received from the scientific community, though. He said, “If you ask about advertising and entertainment in general —haters gonna hate. We are developing a new medium —the first media in orbit.”Although technically accessible, the Orbital Display project is likely to face some difficulties. Still, we wouldn’t be surprised if, instea d of stars, we’ll be looking at ads from the world’s biggest brands when looking at the night sky in the not so distant future.28.What can we learn about StartRocket project from the first two paragraphs?A.The company aims to launch billboard satellites into space in 2021.B.Many famous brands and events have teamed up with the project.C.The company is one of the most professional and experienced pioneers.D.The project mainly focuses on developing entertainment for better future life.29.Which of the following is NOT a reason for some experts opposing(反对) StartRocket project?A.Because those satellites will eventually become space junk.B.Because those satellites are potential dangers for aviation safety.C.Because the banners will impact astronomical research from the earth.D.Because the ads might influence the enjoyment of gazing at the night sky.30.What is the passage mainly about?A.The StartRocket project will replace stars with twinkling ads billboards.B.Some experts and professionals are opposed to the StartRocket project.C.The Orbital Display project is faced with some technological difficulties.D.The Russian firm StartRocket is dedicated to(致力于) launching billboards into space.31.Where does this text probably come from?A. A research paper.B. A business journal.C. A news website.D. A travel magazine.DAre you planning to eat out tonight or are you going to stay in to save the pennies(省钱)? A meal out at a good restaurant or even a pizzeria can cost you a small fortune, so cooking for yourself makes financial sense. But with the rise in food prices, it’s important to be a wise shopper to keep your food bill in check.These days our supermarket shelves are packed with tempting food items, from the daily staples, like bread and milk, to the exotic, like mangoes and kiwifruits(猕猴桃). There’s also the option of buying ready meals – convenientfood that comes at a price. However, if you’re feeli ng hard up(拮据), there are things you can do to make the money you spend on food go further.According to the BBC Food website, it’s all about changing your habits. It claims that cooking fulfilling and tasty meals on a budget is easy. It suggests a number of “tricks” such as using cheaper cuts of meat, “choose small amounts of m eat with less expensive proteins” and “transform small quantities of leftovers into a heavy m eal”.A favorite entertainment of mine to help when money is tight is to stock up on items that are on special offer – such as BOGOF deals (Buy one, get one free). However, this is more of a problem when it comes to perishable(易腐烂的) items like fresh fruit and vegetables. In the UK, about 39% of household food waste is fruit and veg. So it’s a good idea not to stock up on too much of these things. Store them carefully and make the most of them in all your recipes.Food waste is a big problem generally, so shopping carefully can also reduce the amount we throw away. And in Edinburgh in Scotland, it’s possible to reduce waste and not break the bank by visiting a recycled food shop, which has been set up to prevent extra food from shops ending up in the bins(垃圾桶).Of course, the biggest thing you can do to help your cash flow is to cut back on take-away coffees and lunches. Cooking your own meals is usually healthier for you and your finances.32.According to the author, which of the following ways cost the least money?A. To have meals at a good restaurant.B. To cook meals for yourself at home.C. To buy exotic fruit and vegetables.D. To buy ready meals or convenient food.33.What does the author usually do to save the expenses on food?A.He chooses small amounts of meat with expensive proteins.B.He transforms large quantities of leftovers into a heavy meal.C.He stocks up on items of special offer – such as BOGOF deals.D.He makes all the perishable fruit and vegetables in all his recipes.34.How do some people reduce food waste in the UK?A.They often visits recycled food shops.B.They store most of their food carefully.C.They buy take-away coffees and lunches.D.They only throw away the perishable food.35.Which one can be the best title of this passage?A.Ways to Cook Tasty Meals at HomeB.Ways to Cut Daily Expenses on MealsC.Ways to Buy Food in the SupermarketD.Ways to Store Fresh Fruit and Vegetables第二节 (共5 小题;每小题2 分,满分10 分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

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