10.1-10.3 测试卷A
2023-2024学年第一学期九年级教学质量监测考试10月月考英语试题及答案

2023-2024》一. 2023-2024学年第一学期九年级教质量检测考试英语听力测试部分10月月考检测范围:Unit1~Unit2情景反应本题共有五个小题 ,每小题你将听到一组对话, 请你从每小题所的A.B.C.三幅图片中选出你所听到的信息相关联的一项并在答题卡上将该项涂黑.1.W: Tom , how do you study for your English test?M: I study by reading textbooks in the morning.2.W: What do you usually eat on Spring Festival?M: We usually eat dumplings.3.M: What’s your favorite subject?W: Chemistry is my favorite subject. I like doing experiments.4. M: What a good day it is! Let’s watch the dragon boat races.W: That’s sounds great.5. M: What are you going to buy for your father on the father’s day?W: I plan to buy him a tie.二、对话理解本题共有5个小题,每小题你将听到一组对话和一个问题。
请你从每小题所给的A 、B 、C 三个选项中,选出一个最佳选项,并在答题卡上将该项涂黑。
6.M :How do you study for a Chinese test, Susan ?W: By reviewing my notebooks.Q:How does Susan study for or English test ?7.M: Mary, did you try the mooncakes yesterday ?W: Of course, I did. They were really delicious.Q: What was the Festival yesterday?8. M: Hurry up, Tom! We have to take an exam this morning.W: It's half past seven. We still have thirty minutes left.Q: When will the exam begin?9. M: Tina, could you turn off the TV?W: Sorry, Bill. I forgot you are doing your homework.Q: Where are the two speakers?10. M: Tom was late again.W: That is Tom. We have to be patient and understanding .Q: What does the woman mean?三、语篇理解本题你将听到一篇短文。
2021年高三上学期10月月考试卷(英语)

2021年高三上学期10月月考试卷(英语)I.听力(共两节20小题,满分10分)第一节:请听下面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,并标在试卷的相应位置。
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.What is wrong with the woman?A.She lost a lot of money.B.She can’t afford a wallet.C.She doesn’t know what to do.2.When should the professor be back?A.At 2:30.B.At 3:40.C.At 3:30.3.How does the man think the woman plays the guitar?A.Worse than he.B.Better than he.C.As well as he.4.What is the probable relationship between the speakers?A.Writer and reader.B.Salesman and customer.C.Husband and wife.5.What does the man tell the woman to do?A.Attend a meeting.B.Look for a report.C.Prepare for a plan.第二节(共15小题)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。
请听第6段材料,回答第6~8题。
6.Where does the conversation probably take place?A.At a party.B.In a pany.C.In a conference room.7.What is the relationship between the speakers?A.Friends.B.Strangers.C.Classmates.8.Where is the man from?A.China.B.Japan.C.The US.请听第7段材料,回答第9至11题。
高三英语十月A卷答案终极版

江油中学高2021 级高三上10月月考考试英语答案(A卷)一、听力:1-5: ACABB 6-10: CBBAC 11-15: CAABC 16-20: CBACB二、阅读21-23: ACB 24-27: DBCA 28-31: DACB 32-35: BDAC三、七选五36-40: DAEBF四、完形填空41-45: BABCD 46-50: CACBA 51-55: DDACD 56-60: BADBC五、语法填空61. refers 62. interestingly 63. a 64. fascinating 65. made66. Living 67. are allowed 68. which 69. to 70. curiosity六、短文改错1.去掉back2. wanted-want3. that-what4. good-well5. place-places6. her-his7. better前加a8. attracted-attracting9. at-around 10. Unless-If/When/Once七、作文The Charming Campus in My MindWhat should a charming campus be like?From my point of view, a charming campus should be full of birds’ twitter and fragrance of flowers. A good environment is fundamental. Besides, the students can not only learn knowledge but also develop in an all-around way on campus. The school gym and playground can often see students doing sports. Various student associations are necessary, which offer chances for students to enjoy more colourful school life. For a charming campus, the most important is that everyone, no matter you’re working or studying in it, is optimistic and in high spirits. Everyone is on the way of chasing his/her dream.Such is the charming campus in my mind.。
重庆市2023-2024学年高三上学期10月月考数学试题含答案

重庆高2024届高三上10月质量监测数学试题(答案在最后)一、单项选择题:本大题共8小题,每小题5分,共计40分.1.定义集合,A B 的一种运算:2{|,,}A B x x b a a A b B ⊗==-∈∈,若{1,4},{1,2}A B ==-,则A B ⊗中的元素个数为()A.1B.2C.3D.4【答案】C 【解析】【分析】计算可求得{}0,3,3A B ⊗=-,可得结论.【详解】因为{1,4},{1,2}A B ==-,当1,1a b ==-时,20x b a =-=,当1,2a b ==时,23x b a =-=,当4,1a b ==-时,23x b a =-=-,当4,2a b ==时,20x b a =-=,所以{}0,3,3A B ⊗=-,故A B ⊗中的元素个数为3.故选:C.2.直线10ax y +-=被圆22(1)(4)4x y -+-=所截得的弦长为a =()A.43-B.34-C.3D.2【答案】A 【解析】【分析】先求出圆心到直线10ax y +-=的距离,结合点到直线的距离公式,即可得出a 的值.【详解】圆22(1)(4)4x y -+-=的圆心为(1,4),半径为2r =,1=,根据点到直线距离公式,知圆心(1,4)到直线10ax y +-=的距离1d ==,化简可得22(3)1a a +=+,解得43a =-.故选:A.3.已知:p x a ≥,:||6q x a +<,且p 是q 的必要不充分条件,则a 的取值范围为()A.(−∞,−3]B.(−∞,−3)C.[3,+∞)D.(3,+∞)【答案】A 【解析】【分析】由题意可得6a a ≤--,求解即可.【详解】由||6x a +<,解得66a x a --<<-,由p 是q 的必要不充分条件,所以6a a ≤--,解得3a ≤-,所以a 的取值范围为(,3]-∞-.故选:A.4.下列说法中,正确的是()A.设一组样本数据12,,,n x x x 的方差为0.1,则数据1210,10,,10n x x x 的方差为1B.已知数据2,3,5,7,8,9,10,11,则该组数据的上四分位数为9C.一组样本数据的频率分布直方图是单峰的且形状是对称的,则该组数据的平均数和中位数近似相等D.频率分布直方图中各小长方形的面积等于相应各组的频数【答案】C 【解析】【分析】依据方差的性质计算可判断选项A ;求得四分位数可判断选项B ;依据中位数定义和平均数定义去判断选项C ;由频率直方图的意义可判断D.【详解】对于A ,设一组样本数据12,,,n x x x 的方差为0.1,则数据1210,10,,10n x x x 的方差为2100.110⨯=,故A 错误;对于B ,因为80.756⨯=,所以该组数据的上四分位数为9109.52+=,故B 错误;对于C ,一组样本数据的频率分布直方图是单峰的且形状是对称的,则该组数据的平均数和中位数近似相等,故C 正确;对于D ,频率分布直方图中各小长方形的面积等于相应各组的频率,故D 错误.故选:C.5.已知3a log 6=,5log 10b =,7log 14c =,则()A.b a c << B.c b a<< C.a b c<< D.a c b<<【答案】B 【解析】【分析】根据对数的运算和对数函数的性质即可求解.【详解】因为3321log 61log 21,log 3a ==+=+5521log 101log 21log 5b ==+=+,7721log 141log 21log 7c ==+=+且222log 7>log 5log 3>0>;所以a b c >>.故选:B.6.已知2F 是椭圆()222210+=>>x y a b a b的右焦点,点P 在椭圆上,()220OP OF PF +⋅= ,且22OP OF b +=,则椭圆的离心率为()A.3B.5C.4D.5【答案】A 【解析】【分析】设2PF 的中点为Q ,根据向量的线性运算法则及数量积的定义可得2OQ PF ⊥,从而得到12PF PF ⊥,根据22OP OF b +=得到1||2PF b =,再根据椭圆的定义得到2||PF ,在直角三角形中利用勾股定理得到23b a =,最后根据离心率公式计算可得;【详解】解:设2PF 的中点为Q ,则22OP OF OQ += 由22()0OP OF PF +⋅= ,即220OQ PF ⋅=所以2OQ PF ⊥,连接1PF 可得1//OQ PF ,所以12PF PF ⊥,因为22OP OF b += ,即22OQ b =,即1||2PF b=所以21||2||22PF a PF a b =-=-,在12R t PF F 中,2221212||||||PF PF F F +=,即()()2222224c b a b -+=,又222c a b =-,所以222222b a b ab a b +=+--,所以232b ab =,即23b a =解得22222513c a b b e a a a -===-,故选:A7.设函数f(x)是定义在R 上的偶函数,且f(x+2)=f(2-x),当x∈[-2,0]时,f(x)=212x⎛⎫- ⎪ ⎪⎝⎭,则在区间(-2,6)上关于x 的方程f(x)-log 8(x+2)=0的解的个数为A.4 B.3C.2D.1【答案】B 【解析】【分析】把原方程转化为()y f x =与8log (2)y x =+的图象的交点个数问题,由(2)(2)f x f x +=-,可知()f x 的图象关于2x =对称,再在同一坐标系下,画出两函数的图象,结合图象,即可求解.【详解】由题意,原方程等价于()y f x =与8log (2)y x =+的图象的交点个数问题,由(2)(2)f x f x +=-,可知()f x 的图象关于2x =对称,作出()f x 在(0,2)上的图象,再根据()f x 是偶函数,图象关于y 轴对称,结合对称性,可得作出()f x 在()2,6-上的图象,如图所示.再在同一坐标系下,画出8log (2)y x =+的图象,同时注意其图象过点(6,1),由图可知,两图象在区间()2,6-内有三个交点,从而原方程有三个根,故选B.【点睛】本题主要考查了对数函数的图象,以及函数的奇偶性的应用,其中解答中熟记对数函数的性质,合理应用函数的奇偶性,在同一坐标系内作出两函数的图象,结合图象求解是解答的关键,着重考查了数形结合思想,以及转化思想的应用,属于中档试题.8.已知函数() )2023f x x =-+,,a b 满足 (2)(4)4046(,f a f b a b +-=为正实数),则242b a a ab b ++的最小值为()A.1B.2C.4D.658【答案】B 【解析】【分析】由已知构造函数()()2023g x f x =-,探讨函数()g x 的单调性、奇偶性,进而求得24a b +=,再利用基本不等式求解即得.【详解】令()()2023)g x f x x =-=-||x x >≥,得()g x 定义域为R ,()()))ln10g x g x x x -+=+==,即函数()g x 是奇函数,而())g x x -=-,当0x ≥时,函数u x =+是增函数,又ln y u =是增函数,于是函数()g x 在[0,)+∞上单调递减,由奇函数的性质知,函数()g x 在(,0]-∞上单调递减,因此函数()g x 在R 上单调递减,由(2)(4)4046f a f b +-=,得(2)2023(4)20230f a f b -+--=,即(2)(4)0g a g b +-=,所以(2)(4)(4)g a g b g b =--=-,则24a b =-,即24a b +=,又0,0a b >>,所以244422(2)4b b b a ab b a b a a a a a b b +=+=+≥++,当且仅当164,99a b ==时取等号,所以242b a a ab b ++的最小值为2.故选:B.二、多项选择题:本大题共4小题,每小题5分,共计20分.9.已知1,0a b c >><,则()A.c a <cbB.()ac ->()bc -C.a cb a +⎛⎫< ⎪⎝⎭b cb a +⎛⎫ ⎪⎝⎭D.()log b a c ->()log a b c -【答案】CD 【解析】【分析】对于A,B ,取特殊值判断即可;对于C,利用指数函数的单调性判断即可;对于D,利用对数函数的单调性判断即可.【详解】对于A,不妨取4,2,c 1a b ===-,则c 1c 1,42a b =-=-,此时c ca b>,故A 错误;对于B,不妨取4,2,c 1a b ===-,则42()11,()11a b c c -==-==,此时()()a b c c -=-,故B 错误;对于C,因为1a b >>,所以01b a <<,所以指数函数xb y a ⎛⎫= ⎪⎝⎭在R 上单调递减,因为0c <,所以a c b c +>+,所以a cb cb b a a ++⎛⎫⎛⎫< ⎪ ⎪⎝⎭⎝⎭,故C 正确;对于D,因为1a b >>,所以对数函数log b y x =和log a y x =在()0,∞+上单调递增,因为0c <,所以1a c b c ->->,所以()()log log 0b b ac b c ->->又()()log log 0b a b c b c ->->,所以()()log log b a a c b c ->-,故D 正确.故选:CD.10.第19届亚运会于2023年9月23日至10月8日在杭州举行.现安排小明、小红、小兵3名志愿者到甲、乙、丙、丁四个场馆进行服务.每名志愿者只能选择一个场馆,且允许多人选择同一个场馆,下列说法中正确的有()A.所有可能的方法有43种B.若场馆甲必须有志愿者去,则不同的安排方法有37种C.若志愿者小明必须去场馆甲,则不同的安排方法有16种D.若三名志愿者所选场馆各不相同,则不同的安排方法有24种【答案】BCD 【解析】【分析】利用分步乘法计数原理判断AC 选项的正确性,利用分类加法计数原理以及组合数计算判断B 选项的正确性,利用排列数计算判断D 选项的正确性.【详解】对于A ,所有可能的方法有34种,故A 错误.对于B ,分三种情况:第一种:若有1名志愿者去场馆甲,则去场馆甲的志愿者情况为13C ,另外两名同学的安排方法有339⨯=种,此种情况共有13C 927⨯=种,第二种:若有两名志愿者去场馆甲,则志愿者选派情况有23C ,另外一名志愿者的排法有3种,此种情况共有23C 39⨯=种,第三种情况,若三名志愿者都去场馆甲,此种情况唯一,则共有279137++=种安排方法,B 正确.对于C ,若小明必去甲场馆,则小红,小兵两名志愿者各有4种安排,共有4416⨯=种安排,C 正确.对于D ,若三名志愿者所选场馆各不同,则共有34A 24=种安排,D 正确.故选:BCD.11.已知双曲线22:1(01)91x y C k k k +=<<--,则()A.双曲线C 的焦点在x 轴上B.双曲线C 的焦距等于C.双曲线CD.双曲线C的离心率的取值范围为1,3⎛⎫⎪ ⎪⎝⎭【答案】ACD 【解析】【分析】根据双曲线的简单几何性质,对各选项逐一分析即可得答案.【详解】解:对A :因为01k <<,所以90k ->,10k -<,所以双曲线22:1(01)91x y C k k k-=<<--表示焦点在x 轴上的双曲线,故选项A 正确;对B :由A 知229,1a k b k =-=-,所以222102c a b k =+=-,所以c =所以双曲线C的焦距等于)21c k <<=,故选项B 错误;对C :设焦点在x 轴上的双曲线C 的方程为()222210,0x ya b a b-=>>,焦点坐标为(),0c ±,则渐近线方程为by x a=±,即0bx ay ±=,所以焦点到渐近线的距离d b ==,所以双曲线22:1(01)91x y C k k k -=<<--C 正确;对D :双曲线C的离心率e ===,因为01k <<,所以8101299k <-<-,所以13,e ⎛⎫ ⎪ ⎪⎝=⎭,故选项D 正确.故选:ACD.12.信息熵常被用来作为一个系统的信息含量的量化指标,从而可以进一步用来作为系统方程优化的目标或者参数选择的判据.在决策树的生成过程中,就使用了熵来作为样本最优属性划分的判据.信息论之父克劳德·香农给出的信息熵的三个性质:①单调性,发生概率越高的事件,其携带的信息量越低;②非负性,信息熵可以看作为一种广度量,非负性是一种合理的必然;③累加性,即多随机事件同时发生存在的总不确定性的量度是可以表示为各事件不确定性的量度的和.克劳德⋅香农从数学上严格证明了满足上述三个条件的随机变量不确定性度量函数具有唯一形式21()log1nii i H X CP P ==-=∑,令1=C ,设随机变量X 所有取值为1,2,3,⋯,n ,且()()01,2,3,,i P X i P i n ==>= ,11nii P ==∑,则下列说法正确的有()A.1n =时,()0H X =B.n =2时,若1P ∈10,2⎛⎫⎪⎝⎭,则()H X 的值随着1P的增大而增大C.若1P =2P =112n -,1k P +=2kP (2,N k k ≥∈),则()2122n H X -=-D.若2n m =,随机变量Y 的所有可能取值为12m ,,,,且()()()()2112P Y j P X j P X m j j m ===+=+-= ,,,,,则()()H X H Y ≤【答案】ABC 【解析】【分析】A 直接利用公式求解;B 先求出()2log H X n =,再判断单调性即可求解;CD 分别求出()H X 和()H Y ,结合对数函数单调性放缩即可求解.【详解】对于A :若1n =,则11,1i P ==,因此()()21log 10,A H x =-⨯=正确;对于B :当2n =时,()()()112112110,,log 1l 12P H x PP P og P ⎛⎫∈=---- ⎪⎝⎭,令()()()221log 1log 1,0,2f t t t t t t ⎛⎫=----∈ ⎪⎝⎭,则()()2221log log 1log 10f t t t t ⎛⎫=-+-=-> ⎪⎝⎭',即函数()f t 在10,2⎛⎫⎪⎝⎭上单调递增,所以()H x 的值随着1P的增大而增大,B 正确;对于C :()12111,22,N 2k k n P P P P k k +-===≥∈,则22211212,222k k k n n k P P k ----+=⨯==≥,22111111log log 222k k n k n k n k n k P P -+-+-+-+==-,,而1212111111log log 222n n n n P P ----==-,于是()2111222111221log ...222222n k k n n n n k n n n n H x P P ----=----=+=+++++∑1122112212222222n n n n n n n n n n ------=-++++++ 令231123122222n n n n nS --=+++++ ,则234112312221222n n n S n n +-=+++++ ,两式相减得2311111111111222112222222212n n n n n n n n n S +++⎛⎫- ⎪+⎝⎭=++++-=-=-- ,因此222n n n S +=-,()112112122222222nn n n n n n n n n n n H x S -----+=-+=-+-=-,C 正确;对于D ,若2n m =,随机变量Y 的所有可能的取值为1,2,,m ,且()()()()21,1,2,,P Y j P X j P X m j j m ===+=+-=⋯,222211()l 1og log m mi i i i i iH x P P P P ===-=∑∑122221222122121111log log log log m m m m P P P P P P P P --=++++ ()()()()122221212122211111log log log m m m m mm m m H Y P P P P P P P P P P P P -+-+=+++++++++ 12222122212221221121111log log log log m m m m m mP P P P P P P P P P P P ---=++++++++ 由于()01,2,,2i P i m >= ,即有2111i i m i P P P +->+,则222111log log i i m iP P P +->+,因此222111log log i i i i m iP P P P P +->+,所以()()H X H Y >,D 错误.故选:ABC .三、填空题:本大题共4小题,每小题5分,共20分.13.已知P 为椭圆221123x y +=上一点,1F ,2F 分别是椭圆的左、右焦点,1260F PF ∠︒=,则12F PF 的面积为_______.【解析】【分析】结合椭圆定义与余弦定理、面积公式计算即可得.【详解】由已知得a =,b =,所以3c ===,从而1226F F c ==,在12F PF 中,2221212122cos 60F F PF PF PF PF ⋅︒=+-,即22121236PF PF PF PF ⋅=+-①,由椭圆的定义得12PF PF +=,即221212482PF PF PF PF ⋅=++②,由①②得124PF PF ⋅=,所以12121sin 602F PF S PF PF ⋅⋅=︒= .14.若a ,0b >,且3ab a b =++,则ab 的最小值是____________.【答案】9【解析】【分析】利用基本不等式得3a b ab +=-≥,再解不等式可得结果.【详解】因为3a b ab +=-≥(当且仅当a b =时,等号成立),所以230--≥,所以1)0-+≥3≥,所以9ab ≥,所以ab 的最小值为9.故答案为:915.设关于x 的不等式220(0)x ax a a -+<<的解集为A ,若集合A 中恰有两个整数解,则实数a 的取值范围为___________.【答案】1[1,3--【解析】【分析】令2()2f x x ax a =-+,根据不等式220(0)x ax a a -+<<解集A 中恰有两个整数解,结合二次函数性质判断整数解为0,1-,从而列出不等式,求得答案.【详解】由题意可得当a<0时,280a a ∆=->,令2()2f x x ax a =-+,则其图象对称轴为02ax =<,且(0)20f a =<,故关于x 的不等式220(0)x ax a a -+<<解集A 中恰有两个的整数解为0,1-,则(1)130f a -=+<且(2)440f a -=+≥,解得113a -≤<-,故答案为:1[1,3--.16.已知函数()12e 0ƒ210x x x x x x -⎧>⎪=⎨--+≤⎪⎩,,,若方程()2f x ⎡⎤⎣⎦−()bf x +4=0有6个相异的实数根,则实数b 的取值范围是__________.【答案】44e eb <<+【解析】【分析】根据题意,作出函数()1|2e ,021,0x x f x x x x -⎧>=⎨--+≤⎩∣的图象,进而数形结合,将问题转化为方程240t bt -+=有两个不相等的实数根12,t t ,再结合二次函数零点分布求解即可.【详解】根据题意,作出函数()1|2e ,021,0x x f x x x x -⎧>=⎨--+≤⎩∣的图象,如图:令()t f x =,因为方程()()240fx bf x -+=有6个相异的实数根,所以方程240t bt -+=有两个不等的实根,所以2160b ∆=->,解得4b <-或4b >,不妨设这两根12t t <,则1212t t =⎧⎨=⎩或12122e t t <<⎧⎨<<⎩,当1212t t =⎧⎨=⎩时,123t t b +==,且1224t t ==,所以无解;当12122e t t <<⎧⎨<<⎩时,令()24g t t bt =-+,只需()()()1020e 0g g g ⎧>⎪<⎨⎪>⎩,即21404240e e 40b b b -+>⎧⎪-+<⎨⎪-+>⎩,解得44e e b <<+,终上所述:44e eb <<+.故答案为:44e eb <<+.四、解答题:本大题共6小题,共70分.17.已知函数() 938xf x a x =-⋅+.(1)当2a =时,求不等式() 16f x ≥的解集;(2)若函数() f x 在()0,∞+有零点,求实数a .【答案】(1)[)3log 4,+∞(2))⎡+∞⎣【解析】【分析】(1)令()30xt t =>,则()()280g t t at t =-+>,再由()16f x ≥,解不等式即可;(2)函数()f x 在0,+∞有零点等价于函数()g t 在1,+∞上有零点,即8a t t=+在1,+∞上有解,由基本不等式求出a 的取值范围.【小问1详解】因为()938xf x a x =-⋅+,令()30xt t =>,则()()280g t t at t =-+>,当2a =时,()()2280g t t t t =-+>,()16f x ≥即()16g t ≥,即2280t t --≥,由0t >,解得4t ≥,即34x ≥,解得3log 4x ≥,所以原不等式的解集为[)3log 4,∞+.【小问2详解】因为函数3x t =在R 上单调递增,所以函数()f x 在0,+∞有零点等价于函数()g t 在1,+∞上有零点,280t at -+=由大于1的解,即8a t t=+在1,+∞上有解,因为8t t +≥=8t t =,即t =时等号成立,得a ≥所以实数a 的取值范围为)∞⎡+⎣.18.已知双曲线的中心在原点,焦点在x 轴上,离心率为2,且过点(4,P .(1)求双曲线的方程;(2)直线l y kx =+:C 的左支交于A ,B 两点,求k 的取值范围.【答案】(1)22166x y -=(2)13k <<【解析】【分析】(1)根据题意求解双曲线方程即可;(2)联立直线和双曲线方程,通过判别式大于0,及12120,0x x x x +求解即可.【小问1详解】双曲线的中心在原点,焦点在x 轴上,设双曲线的方程为22221(0,0)x ya b a b-=>>由c e a ===,可得a b =,由双曲线过点(4,,可得2216101a b-=,解得6a b ==,则双曲线的标准方程为22166x y -=;【小问2详解】联立直线与双曲线方程22166x y y kx ⎧-=⎪⎨⎪=⎩,化简得()22180kx---=,则210k -≠,假设1122()A x y B x y ,,(,),则()222122122Δ)3213224001801k k x x k x x k ⎧=+-=->⎪⎪⎪+=<⎨-⎪-⎪=>⎪-⎩,解得13k <<.19.已知()x f x e ex =-+(e 为自然对数的底数)(Ⅰ)求函数()f x 的最大值;(Ⅱ)设21()ln 2g x x x ax =++,若对任意1(0,2]x ∈,总存在2(0,2]x ∈.使得()()12g x f x <,求实数a 的取值范围.【答案】(Ⅰ)0;(Ⅱ)1,ln 212⎛⎫-∞-- ⎪⎝⎭【解析】【分析】(Ⅰ)求出函数导数,判断出单调性,即可求出最值;(Ⅱ)问题转化为()()12max g x f x <,即()0g x <在(]0,2恒成立,分离参数可得ln 12x a x x ->+,构造函数()(]ln 1,0,22x h x x x x =+∈,利用导数求出函数的最大值即可.【详解】(Ⅰ) ()x f x e ex =-+,()xf x e e '∴=-+,令()0f x '>,解得1x <;令()0f x '<,解得1x >,()f x \在−∞,0单调递增,在()1,+∞单调递减,()()max 10f x f ∴==;(Ⅱ)对任意1(0,2]x ∈,总存在2(0,2]x ∈.使得()()12g x f x <等价于()()12max g x f x <,由(Ⅰ)()()2max 10f x f ==,则问题转化为()0g x <在(]0,2恒成立,化得21ln ln 122x xx a x x x +->=+,令()(]ln 1,0,22x h x x x x =+∈,则()21ln 12x h x x -'=+,当(]0,2x ∈时,1ln 0x ->,得()0h x '>,()h x ∴在(]0,2单调递增,()()max 12ln 212h x h ∴==+,则1ln 212a ->+,即1ln 212a <--,故a 的取值范围为1,ln 212⎛⎫-∞-- ⎪⎝⎭【点睛】关键点睛:本题考查不等式的恒成立问题,解题的关键是将问题转化为()()12max g x f x <,即()0g x <在(]0,2恒成立.20.图,在直三棱柱111ABC A B C -中,,,O M N 分别为线段11,,BC AA BB 的中点,P 为线段1AC 上的动点,11,3,4,82AO BC AB AC AA ====.(1)求三棱锥1C C MN -的体积;(2)试确定动点P 的位置,使直线MP 与平面11BB C C 所成角的正弦值最大.【答案】(1)16(2)P 为1AC 的中点【解析】【分析】(1)由题意可得BA ⊥平面11AA C C ,进而可证MN ⊥平面11AA C C ,利用等体积法可求三棱锥1C C MN -的体积;(2)以A 为原点,以1,,AB AC AA 为,,x y z 轴建立空间直角坐标系,发现为的中点时所成角的正弦值最大.【小问1详解】在直三棱柱111ABC A B C -中,1CC ⊥平面ABC ,因为AB ⊂平面ABC ,所以1CC AB ⊥,由12AO BC =,O 是BC 的中点,则BA AC ⊥,因为1AC CC C = ,1,AC CC ⊂平面11AA C C ,所以BA ⊥平面11AA C C ,因为,M N 分别为线段11,AA BB 的中点,所以//MN AB ,所以MN ⊥平面11AA C C ,因为13,4,8AB AC AA ===,所以N 平面1CC M 的距离为3,因为四边形11AA C C 为矩形,M 为线段1AA 的中点,所以116CC M S = ,所以111163163C C MN N CC M V V --==⨯⨯=.【小问2详解】在ABC V 中,因为O 是BC 的中点,12AO BC =,所以BA AC ⊥,因为1AA ⊥平面ABC ,,AB AC ⊂平面ABC ,所以11,,AA AB AA AC ⊥⊥以A 为原点,以1,,AB AC AA 为,,x y z 轴建立空间直角坐标系,由题设可得11(0,0,0),(3,0,0),(0,4,0),(0,4,8),(0,0,4),(3,0,8),(3,0,4)A B C C M B N ,1(3,4,0),(0,0,8)BC BB =-=,设平面11BB C C 的法向量为(,,)n x y z =,则1·340·80BC n x y BB n z ⎧=-+=⎪⎨==⎪⎩ ,令4x =,得3,0y z ==,所以平面11BB C C 的法向量为(4,3,0)n =,设(,,)P a b c ,1(01)AP mAC m =≤≤,则(,,)(0,4,8)a b c m =,所以(0,4,8)P m m ,(0,4,84)MP m m =-,设直线MP 与平面11BB C C 所成的角为θ,则222||sin ||||516(84)5541n MP n MP m m m m θ===+--+,若0m =,sin 0θ=此时,点P 与A 重合;若0m ≠,令11t m=≥,则2233355545(2)1sin t t t θ=≤-+-+=,当2t =,即12m =,P 为1AC 的中点时,sin θ取得最大值35.21.树德中学为了调查中学生周末回家使用智能手机玩耍网络游戏情况,学校德育处随机选取高一年级中的100名男同学和100名女同学进行无记名问卷调查.问卷调查中设置了两个问题:①你是否为男生?②你是否使用智能手机玩耍网络游戏?调查分两个环节:第一个环节:先确定回答哪一个问题,让被调查的200名同学从装有3个白球,3个黑球(除颜色外完全相同)的袋子中随机摸取两个球,摸到同色两球的学生如实回答第一个问题,摸到异色两球的学生如实回答第二个问题;第二个环节:再填写问卷(只填“是”与“否”).回收全部问卷,经统计问卷中共有70张答案为“是”.(1)根据以上的调查结果,利用你所学的知识,估计该校中学生使用智能手机玩耍网络游戏的概率;(2)据核查以上的200名学生中有30名男学生使用智能手机玩耍网络游戏,按照(1)中的概率计算,依据小概率值α=0.15的独立性检验,能否认为中学生使用智能手机玩耍网络游戏与性别有关联;若有关联,请解释所得结论的实际含义.参考公式和数据如下:()()()()()22n ad bcn a b c da b c d a c b dχ-==+++ ++++,.α0.150.100.050.0250.005 xα 2.072 2.706 3.841 5.0247.879【答案】(1)1 4(2)有关联,答案见解析【解析】【分析】(1)由题可得摸到同色两球的概率,进而可得回答第一个问题的人数及选择“是”的人数,再利用古典概型概率公式即得;(2)通过计算2χ,进而即得.【小问1详解】因为摸到同色两球的概率223326C+C2C5 p==,所以回答第一个问题的人数为2 200805⨯=人,回答第二个问题的人数为20080120-=人,因为男女人数相等,是等可能的,所以回答第一个问题,选择“是”的同学人数为180402⨯=人,则回答第二个问题,选择“是”的同学人数为704030-=人,所以估计中学生在考试中有作弊现象的概率为301 1204=.【小问2详解】由(1)可知200名学生使用智能手机玩网络游戏估计有50人,则有20名女生使用智能手机玩网络游戏男女合计使用智能手机玩游戏302050不用智能手机玩游戏7080150100100200零假设为:0H 使用智能手机玩耍游戏与性别无关,()222003080207082.67 2.072501501001003χ⨯⨯-⨯==≈>⨯⨯⨯根据小概率值0.15α=的独立性检验,推断0H 不成立,因此认为使用智能手机玩耍网络游戏与性别有关,此推断犯错误的概率不大于0.15.在男生中使用智能手机玩耍游戏和不使用智能手机玩耍游戏的概率分别为0.3,0.7,在女生中使用智能手机玩耍游戏和不使用智能手机玩耍游戏的概率分别为0.2,0.8,在被调查者中男生使用智能手机玩耍游戏是女生的1.5倍,于是根据概率稳定概率的原理,我们可以认为男士使用智能手机玩耍网络游戏的概率大于女生使用智能手机玩耍网络游戏的概率.22.在平面直角坐标系中,动点M 到()10,的距离等于到直线=−1的距离.(1)求M 的轨迹方程;(2)P 为不在x 轴上的动点,过点P 作(1)中M 的轨迹的两条切线,切点为A ,B ;直线AB 与PO 垂直(O 为坐标原点),与x 轴的交点为R ,与PO 的交点为Q ;(ⅰ)求证:R 是一个定点;(ⅱ)求PQ QR的最小值.【答案】(1)24y x=(2)(ⅰ)证明见解析;(ⅱ)【解析】【分析】(1)利用抛物线的定义求M 的轨迹方程;(2)(ⅰ)设点()()()001122,,,,,P x y A x y B x y ,由切线AP 和BP 的方程,得到直线AB 的方程为()002yy x x =+,又直线AB 与PO 垂直得02x =-,则直线AB 的方程()022yy x =-,可得所过定点.(ⅱ)联立直线AB 与直线OP 的方程得交点Q 的坐标,表示出PQ QR,结合基本不等式求最小值.【小问1详解】因为动点M 到()1,0的距离等于到直线=−1的距离,所以M 的轨迹为开口向右的抛物线,又因为焦点为()1,0,所以轨迹方程为24y x =.【小问2详解】(ⅰ)证明:设点()()()001122,,,,,P x y A x y B x y ,设以1,1为切点的切线方程为()11y y k x x -=-,联立抛物线方程,可得2114440ky y y kx -+-=,由()21Δ420ky =-=,得12k y =,所以切线AP :()112yy x x =+,同理切线BP :()222yy x x =+点P 在两条切线上,则010102022()2()y y x x y y x x =+⎧⎨=+⎩,由于()()1122,,,A x y B x y 均满足方程()002yy x x =+,故此为直线AB 的方程,由于垂直1AB OP k k ⋅=-即0021y y x ⋅=-,则02x =-,所以直线AB 的方程()022yy x =-,恒过()2,0R ;(ⅱ)解:由(ⅰ)知02x =-,则()()02,,2,0P y R -,直线()0:22AB yy x =-联立直线AB 与直线OP 的方程()00222y y x yy x ⎧=-⎪⎨⎪=-⎩得0220048,44y Q y y ⎛⎫- ⎪++⎝⎭,()()()()()()2223220000222202220000224220022222200021684824444||=416||4824444y y y y y y y y y PQ y y RQ y yyy y ++⎛⎫⎛⎫-+--+- ⎪ ++++⎝⎭⎝⎭⎛⎫⎛⎫-+-+- ⎪ ++++⎝⎭⎝⎭()()()()()22222222000004222004888441644y y y y y y y y y +++++==++422000220016641164.16844y y y y y ⎛⎫++=⋅=++≥ ⎪⎝⎭因此||||PQ QR ≥0y =±时取等号.即PQ QR的最小值是.【点睛】方法点睛:解答直线与圆锥曲线的题目时,时常把两个曲线的方程联立,消去x (或y )建立一元二次方程,然后借助根与系数的关系,并结合题设条件建立有关参变量的等量关系,强化有关直线与圆锥曲线联立得出一元二次方程后的运算能力,重视根与系数之间的关系、弦长、斜率、三角形的面积等问题,求最值经常与基本不等式相联系.。
江苏省南通市2023-2024学年高三上学期10月月考试题+英语+Word版含答案

2023~2024学年(上)高三十月质量监测英语第一部分听力(共两节,满分30分)第一节(共5小题;每题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,并标在试卷的相应位置。
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. What will the woman do right after she types the letter?A. Have a meal.B. Change her clothes.C. Take the car.2. How much will the woman pay for the T-shirt and the jeans?A.$10.B.$20.C.$30.及 What do we know about the woman?A. She is burnt.B. She fell asleep in a chair.C. She looks very tired.4. What are the speakers mainly talking about?A. The weather this year.B. The importance of washing.C. Water conservation.(5. What is the man likely to do on Friday?A. See the new exhibition.B. Watch a baseball game.C. Finish a report.第二节(共15小题;每小题1.5分,满分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,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。
2021年高三英语10月第一次阶段复习质量达标检测试题(含解析)新人教版

2021年高三英语10月第一次阶段复习质量达标检测试题(含解析)新人教版试卷总评:整套试卷突出了语言运用能力的考查。
其中语言知识部分,10道单项选择题侧重动词和句法;动词方面,考查了动词时态、语态、语气、主谓一致、非谓语动词、情态动词,可谓是涉及了动词方方面面的语法知识。
句法方面,考查了定语从句、状语从句和名词性从句,考查面也很广。
完形填空第一、二节难度都不算很大。
阅读理解题阅读量不大,阅读难度不高,且试题以细节理解题为主。
写作部分的阅读表达难度不大,信息比较好确定,但答案整理还是存在一定难度。
总的来说,整套试卷的难度小,属偏易范畴。
第一部分:英语知识运用(共两节,满分55分)第一节:单项填空(共10小题;每小题1.5分,满分15分)1. Meals in Spain are quite different from _____ they have here in China.A. whatB. whichC. thatD. whom【答案】【知识点】 A13 名词性从句【答案解析】A。
解析:句意:西班牙的饮食和他们在中国吃的完全不同。
from后由what引导宾语从句,其本身在从句中充当have的宾语,表示所吃的东西。
2. --- Why was Professor Smith unhappy recently?--- Because the theory he stuck to ______ wrong.A. provedB. provingC. being provedD. was proved【答案】【知识点】A11 动词的时态与语态【答案解析】A。
解析:直接用proved表被动,如选D,则用was proved to be wrong.本题要特别注意句子结构,he stuck to 是定语从句。
3. Whenever you_________ a present, you should think about it from the receiver’s point of view.A. boughtB. have boughtC. will buyD. buy【答案】【知识点】A11 动词的时态与语态【答案解析】D。
高三英语上学期10月月考试试题含解析 试题(共27页)
2021-2021学年24中高三上学期(xuéqī)10月月考试英语试题第一卷第一局部:听力〔一共两节,满分是30分〕第一节听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项里面选出最正确选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间是来答复有关小题和阅读下一小题。
每段对话仅读一遍。
例:How much is the shirt?A.19.1.B.9.18.C.9.15.答案是C。
1.Where are the speakers?A.On a plane.B.On a bus.C.On a ship.2.What time is it now?A.7:00.B.7:25.C.7:30.3.What does the man mean?A.He is too busy to help her.B.His hands are holding something.C.He wants to move the sofa all by himself.4.Who is the woman?A.Mr.Johnson’s secretary.B.Mr.Johnson’s wife.C.Mr.Johnson’s mother.5.How does the man feel?A.Worried.B.Excited.C.Unconcerned.第二节听下面5段对话或者独白。
每段对话或者独白后有几个小题,从题中所给的A、B、C三个选项里面选出最正确选项,并标在试卷的相应位置。
听每段对话或者独白前,你将有时间是阅读各个小题,每一小题5秒钟;听完后,每个小题将给出5秒钟的答题时间是。
每段对话或者独白读两遍。
听第6段材料(cáiliào),答复第6至8题。
6.Why did Mary’s parents make her stay at home yesterday evening?A.To let her do her homework.B.To let her take care of her baby sister.C.To let her watch TV.7.What did Mary do yesterday evening?A.She watched boxing on TV.B.She watched a movie about boxing.C.She went to a concert.8.What did John do last night?A.He watched boxing on TV.B.He went to the cinema.C.He went to a concert.听第7段材料,答复第9至11题。
2021年高三数学上学期10月质量检测新人教A版
2021年高三数学上学期10月质量检测新人教A 版一、填空题(共计14小题,每小题5分,共计70分)1.设全集U ={1,2,3,4},集合A ={ 1,3,4},则∁UA = .2.写出命题:“若,则”的否命题: .3.复数的模等于 .4.设,则“”是“直线与直线平行” 的 条件.5. 已知向量a ,b 满足|a|=1,b =(2,1),且λa+b =0(λ∈R),则|λ|=________.6.曲线C :在处的切线斜率为____ ____.7. 已知,,则 .8.圆心在曲线上,且与直线相切的面积最小的圆的方程为 .9. 已知函数为奇函数,则不等式的解集为 .10.实数x ,y 满足约束条件⎩⎪⎨⎪⎧x +y -2≤0,x -2y -2≤0,2x -y +2≥0.若z =y -ax 取得最大值的最优解不唯一,则实数a 的值为 .11.设,若时均有,则 .12.设函数,若存在f(x)的极值点x0满足x20+[f(x0)]2<m2,则m 的取值范围是 .13.在平面直角坐标系xOy 中,已知圆C :x2+y2-6x +5=0,点A ,B 在圆C 上,且AB =23,则|OA →+OB →|的最大值是 .)班 姓名_____________ 学号…内……………不……………要……………答……………题………………14. 已知x ,y ,z ∈R ,且x +y +z =1,x2+y2+z2=3,则xyz 的最大值是________.二、解答题(共计6小题,第15,16,17题每题14分,第18,19,20题每题16分,共计90分)15.已知函数.(1)求函数的最小正周期和单调递减区间; (2)设△的内角的对边分别为且,,若,求的值.16.在直角坐标系xOy 中,已知点A(1,1),B(2,3),C(3,2),点P(x ,y)在△ABC 三边围成的区域(含边界)上. (1)若PA →+PB →+PC →=0,求|OP →|;(2)设OP →=mAB →+nAC →(m ,n ∈R),用x ,y 表示m -n ,并求m -n 的最大值.17. 已知二次函数,关于实数的不等式的解集为 (1)当时,解关于的不等式:;(2)是否存在实数,使得关于的函数()的最小值为?若存在,求实数的值;若不存在,说明理由。
高一上学期物理10月月质量检测考试试卷含解析
一、选择题1.如图所示是三个质点A、B、C的运动轨迹,三个质点同时从N点出发,同时到达M 点,下列说法正确的是()A.三个质点从N到M的平均速度相同B.三个质点到达M点的瞬时速度相同C.三个质点从N到M的平均速率相同D.A质点从N到M的平均速度方向与任意时刻的瞬时速度方向相同2.短跑运动员在100m竞赛中,测得7s末的速度是9m/s,10s末到达终点的速度是10.2m/s,则运动员在全程内的平均速度为()A.9m/s B.10m/s C.9.6m/s D.10.2m/s3.如图所示,粗糙的A、B长方体木块叠放在一起,放在水平桌面上,B木块受到一个水平方向的牵引力,但仍然保持静止,则B木块受力个数为A.4 B.5 C.6 D.34.“曹冲称象”是妇孺皆知的故事,当众人面临大象这样的庞然大物,在因缺少有效的称量工具而束手无策的时候,曹冲称量出大象的质量,体现了他的智慧,被世人称道.下列物理学习或研究中用到的方法与“曹冲称象”的方法相同的是()A.“质点”的概念B.合力与分力的关系C.“瞬时速度”的概念D.研究加速度与合力、质量的关系5.一女同学穿着轮滑鞋以一定的速度俯身“滑入”静止汽车的车底,她用15 s穿越了20辆汽车底部后“滑出”,位移为58 m,假设她的运动可视为匀变速直线运动,从上述数据可以确定( )A.她在车底运动时的加速度B.她在车底运动时的平均速度C.她刚“滑入”车底时的速度D.她刚“滑出”车底时的速度6.下列叙述中不符合历史事实的是()A.古希腊哲学家亚里士多德认为物体越重,下落得越快B.伽利略发现亚里士多德的观点有自相矛盾的地方C.伽利略认为,如果没有空气阻力,重物与轻物应该下落得同样快D.伽利略用实验直接证实了自由落体运动是初速度为零的匀速直线运动7.如图是A、B两个质点做直线运动的位移-时间图线,则A.在运动过程中,A质点总比B质点慢t t=时,两质点的位移相同B.当1t t=时,两质点的速度相等C.当1t t=时,A质点的加速度大于B质点的加速度D.当18.某同学绕操场一周跑了400m,用时65s,这两个物理量分别是A.路程、时刻B.位移、时刻C.路程、时间间隔D.位移、时间间隔9.如图甲、乙所示的x–t图像和v–t图像中给出四条图线,甲、乙、丙、丁代表四辆车由同一地点向同一方向运动的情况,则下列说法正确的是()A.甲车做直线运动,乙车做曲线运动B.0~t1时间内,甲车通过的路程小于乙车通过的路程C.0~t2时间内,丙、丁两车在t2时刻相距最远D.0~t2时间内,丙、丁两车的平均速度相等10.放在水平地面上的一石块重10N,使地面受到10N的压力,则()A.该压力就是重力,施力者是地球B.该压力就是重力,施力者是石块C.该压力是弹力,是由于地面发生形变产生的D.该压力是弹力,是由于石块发生形变产生的11.下列各种情况中,可以把研究对象(加点者)看作质点的是A.蚂蚁..在拖动饭粒时,2min爬行的路程B.研究一列队伍....过桥的时间问题C.裁判给参加比赛的艺术体操运动员.......的比赛打分D.研究地球..的昼夜更替12.如图,物体沿两个半径为的半圆弧由A到C,则它的位移和路程分别是A. 4R,2πR向东B.4R向东,2πR向东C.4πR向东,4R D.4R向东,2πR13.在物理学的发展历程中,首先采用了实验检验猜想和假设的科学方法,把实验和逻辑推理和谐地结合起来的科学家是A.伽利略B.亚里士多德C.爱因斯坦D.牛顿14.做直线运动的位移x与时间t的关系为x=5t+4t2(各物理量均采用国际单位制单位),则该质点的初速度和加速度分别是()A.0、2m/s2B.5m/s、4m/s2C.5m/s、8m/s2D.5m/s、2m/s215.质点沿直线运动,位移—时间图象如图所示,关于质点的运动下列说法正确的是( )A.质点2s末质点改变了运动方向B.质点在4s时间内的位移大小为0C.2s末质点的位移为零,该时刻质点的速度为零D.质点做匀速直线运动,速度大小为0.1m/s,方向与规定的正方向相同16.如图,用两根细线AC、BD静止悬挂一薄板,下列说法不正确...的是A.薄板的重心可能在AC和BD的延长线的交点B.AC的拉力大于BD的拉力C.剪断BD,因为惯性薄板将保持原来的状态一直静止D.若保持AC位置不变,缓慢移动BD到竖直方向,则AC的拉力一直减小17.如图所示,质量分别为m1和m2的木块A和B之间用轻质弹簧相连,在拉力F作用下,竖直向上做匀速直线运动.某时刻突然撤去拉力F,撤去F后的瞬间A和B的加速度大小为a A和a B,则A.a A=0,a B=gB.a A=g,a B=gC.a A=0,a B=122m mgm+D.a A=g,a B=122m mgm+18.下列运动中的物体,能被看做质点的是()A.研究地球的自转B.研究电风扇叶片的旋转C.评判在冰面上花样滑冰运动员的动作D.计算火车从北京到上海的时间19.射箭是奥运会正式比赛项目.运动员将箭射出后,箭在空中飞行过程中受到的力有( )A.重力B.重力、弓弦的弹力C.重力、空气作用力D.重力、弓弦的弹力、空气作用力20.一辆汽车由车站开出,沿平直公路做初速度为零的匀变速直线运动,至第10 s末开始刹车,再经5 s便完全停下.设刹车过程汽车也做匀变速直线运动,那么加速和减速过程车的加速度大小之比是A.1∶2 B.2∶1C.1∶4 D.4∶1二、多选题21.在大型物流货场,广泛的应用着传送带搬运货物。
南京市第十三中学2024-2025学年高一上英语10月月考试卷(含答案)
南京市第十三中学2024-2025学年高一第一学期10月月考英语试题注意事项1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
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。
回答非选择题时,将答案写在答题卡上指定位置,在其他位置作答一律无效。
3.本卷满分为150 分,考试时间为120 分钟。
考试结束后,将本试卷和答题卡一并交回。
第一部分听力(共两节,满分30分)第二部分阅读(共两节,满分50分)第一节(共15 小题;每题2.5分,满分37.5分)阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。
AOnline events are virtual and highly interactive, where people come together to learn and have a good time on the web. Find an online event to enjoy. No matter what you're looking for there's one that's just right for you.Chocolate Donuts-Free WorkshopOrganizer: BAKE IT UP! & LorenaPrice: FreeTime: 3:00 pm-4:30 pm, March 10Join me and learn how to make this super easy dessert. These chocolate donuts baked with a cakey texture (囗感) are soft and of course delicious. Dipped (蒓)in some chocolate, these donuts will be just the perfect gift for your friends or family!The workshop will be live on Facebook & Instagram.Sweet Dreams PJ PartyOrganizer: Secret Dance AddictionPrice: FreeTime:9:00 pm-12:00 pm,March9Feel healthier,more energetic and more alive as you rediscover what it means to DREAM with an expert-led session on the power of rest.Recharge your batteries and then dance yourself into a dream state with an exciting dance party.Wear your pajamas(睡衣).This is a PJ party,after all!Chamber Music ConcertOrganizer:Sands Films Music RoomPrice: FreeTime:4:00pm-6:00pm,March8As spring brings hope of warmer days,Sands Films celebrates International Woman's Day with a program of music from women composers(作曲家)inspired by the spirit of the Belle Epoque.21. What can you do if you join the Chocolate Donuts event?A.Get a chocolate donut for free.B.Lear how to make chocolate donuts.C.Share your experience of making donuts.D.Make friends with people who love chocolate donuts.22. What is the main purpose of the“Sweet Dreams PJ Party"?A. To teach baking skills.B.To host a dance competition.C.To contribute to healthy sleep habits.D.To celebrate International Women's Day.23.what is the common feature of the three events?A. They are all free of charge.B.They all involve physical activities.C.They all take place during the daytime.D.They are all related to food and drinks.BMy breakout fashion moment happened in the fourth grade.On this particular day,I was really feeling myself.I pulled on wildly colorful tights(紧身衣)and a black ruffled(有褶边的) skirt,followed by a light green T-shirt with dark purple dots.Then I added my final touch …a pair of yellow rain boots.I climbed onto the school bus,smiling and feeling like a total star.But when I got off the bus,my friend John looked me up and down and said“What are you wearing!?”Everyone turned and looked at me,and I was discouraged.To be fair,John wasn't trying to be mean.He was just shocked.But while my ego(自尊)took a minute to recover,a rebellious(叛逆的)voice in the back of my mind said,“No,I'm not showing up like everyone else.”Style has always lit me up and felt key to my life on this planet.And through all my years, that little v oice has remained.“I'm not showing up like everyone else.”But the truth is, it isn't about clothes.It's about a powerful need to be accepted by the world as my true self Personal style isn't about being rebellious in order to draw attention.It is deeply rooted in a desire to be seen,not looked at,to be taken in as a whole and unique person by others.But somehow , society can fall short of honoring and understanding this.There is a saying that states,“To be yourself in a world that is constantly trying to make you into something else is the greatest achievement.”When it comes to style and clothes,this world very much has ideas on the “something else”we should be.Wear the clothes you love.Let others do the same and accept the fact that in our short time here in this life together,it's a beautiful honor to be human kaleidoscopes(万花简).24.What does the underlined word“mean”in paragraph3 probably mean?A. Unkind.B.Anxious.C.Tough.D.Concerned.25.What is the main message the author wants to express about personal style?A. It is important to dress in a rebellious way to attract attention.B.Clothing choices are not important as long as one is true to oneself.C.Society would never approve and understand everyone's fashion choices.D.Personal style is rooted in the desire to be fully and uniquely seen by others.26.Why does the author quote a saying in Paragraph 6?A To argue readers into following the footsteps of the others.B.To prove it is challenging to stay true to oneself in today's society.C.To encourage readers to make continuous efforts to move forward.D To strengthen the idea that one should try to change himself to fit in.27.Which of the following is the best title for the text?A.A Unique Childhood Fashion IncidentB.The Importance of Being Different in FashionC.The Way to Create a Bold and Unique Fashion StyleD.The Journey of Self-Acceptance Through Personal StyleCWe are now having face-to-face chats with friends instead of talking online.But have you ever been in a conversation that you wish you could run away from? Scientists have proved that you might not be alone.A research team surveyed 806 participants(参与者)about a recent conversation they had with someone close to them. The participants were asked about the actual length and their expected length of the conversation, and how long they thought the other person wanted to talk for.About one-third of the conversation length was unwanted, according to the team's paper published in the journal PNAS.Also,more participants believed that they wanted to end the conversation first. On average,they continued talking for 3.87 minutes before they found that the other speaker wished the same thing.Situations are similar when it comes to strangers.Only about 1.6 percent of the conversations ended when both parties wanted them to.The paper pointed out that when they talk to strangers,what makes people “mask their desires”may.be their politeness. When talking to close friends and family, it may be their kindness as ending the chat too soon may hurt the other's feelings.So, what is the best way to end a conversation? Saying you only have a certain amount of time to talk at the start of the chat is a good place to start.“Remember conversations don't end because people don't know when the other person wants to go," Adam Mastroianni who led the study told the Inverse website. You should make your partner feel good about the end of the chat by “clearly communicating that you had a nice time and would like to talk again”.Mastroianni also suggested that the difficulty in ending conversations may be a “coordination(协调)problem”.It's hard to tell your grandma you want to get off the phone just because you want the conversation to be over,for example.However,in some ways,this dilemma(困境)may not be a bad thing.People need social connections,and conversation is a good way to make these connections happen.28.What did the researchers find out in their survey?A Most conversations ended when both speakers wanted.B.Nearly half of the length of conversations was unwanted.C. Ending conversations with strangers was easier than with friends.D Many people want to escape the conversation longer than they expect.29.Why do people tend to hide their desire to end the conversation with strangers?A. To show their politeness.B.To gain social connections.C.To avoid hurting others’ feelings.D.To make the conversation last longer.30.According to Adam Mastroianni,what is an effective way to end a conversation?A.Saying goodbye immediately.B.Clearly communicating your desire.C.Expressing your eagerness to talk again.D Reminding the other of your limited time.31.What is the author's attitude towards the dilemma of ending conversations?A.Negative.B.Positive.C.Indifferent.D.Doubtful.DAs summer gives way to autumn,many of us long for warmth and sunlight.It is common for some of us to feel upset when the days get shorter. People call this phenomenon autumn sadness.While autumn sadness is a common seasonal feeling we have as sunlight comes in shorter supply, for some people, it takes on a more serious form known as seasonal affective disorder, or SAD.SAD,a form of depression(抑郁症),mostly starts in late autumn or early winter and goes away in spring and summer. People who have SAD typically oversleep,overeat,and lose interest in activities they once enjoyed.Generally,almost all people suffering from SAD feel sad, helpless. and even desperate.The exact cause of SAD is not yet completely understood, but several factors have been linked to its development.Johns Hopkins University suggests that reduced exposure(接触)to natural light during the autumn and winter months may disrupt the body's internal clock and the hormones(荷尔蒙)produced,such as melatonin(褪黑素)and serotonin(血清素),which are related to sleep and emotions, respectively.This disruption can lead to depression.Addressing SAD often requires medical help.Light therapy is a common and effective treatment. Patients are advised to expose themselves to sunlight or man-made light that imitates natural sunlight Light therapy can help regulate patients’hormones and get their lives back on track.Moreover, living a healthier life,such as maintaining a regular sleep schedule, taking part in regular physical activity,and having a balanced diet, can help manage SAD.But it's also important that people seek help from a medical professional to determine the most suitable treatment plan for their specific needs.It is worth noticing that, according to the National Institute of Mental Health of the US,in most cases,SAD begins in young adulthood.So,while embracing(接受)knowledge in books and classes, don't forget to embrace the sunlight outdoors and get energy from nature!32. What do we know about SAD?A.It usually starts in early autumn.B.It can lead to long-term depression.C.Its main symptoms include feeling sad.D.It is most commonly found in older people.33.According to Johns Hopkins University,what is a possible cause of SAD?A.An unbalanced diet.B.A lack of sunlight.C.An irregular sleep schedule.D.A lack of physical exercise.34.What do paragraphs 5 and 6 mainly talk about?A. How people can deal with SAD.B.What people with SAD have in common.C.Who people with SAD can turn to for help.D.Why medical help is needed for people with SAD.35 What can be nfered from tha last paragraph?A. Young adults are the only group affected by SAD.B.Embracing nature's sunlight is enough to prevent SAD.C.It's important for young adults to take outdoor activities.D.It's never too late to embrace the beauty that nature offers.第二节(共5小题;每小题2.5分,满分12.5分)阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。
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第十章 10.1----10.3 测试卷A
一 填空题(每题2分,共24分)
1.把一个分式的分子与分母中相同的因式约去的过程,叫做 。
2.将)1(22+÷x x 写成分式的形式:
3.用2,12,2+x x 中的任意两个代数式组成一个分式:
4.若,2=x 则分式
=+2
x x 。
5.当 时,分式x 1
无意义。
6.当 时,分式x 21
无意义。
7.当 时,整式2x
的值为零。
8.化简:
=xy
x 24 9. 化简:
=+a ab a 222
10.计算:
=⨯
b
a a
b 11.计算:=2
)21(x
12. 2
)(a
b
2
2a
b (填""=或""≠)
二 选择题(每题3分,共12分)
13、下列各式中是分式的是 ( )
A 21
B 32a
C 222
x x + D x x 212+
14、若分式
1
1+-x x 有意义,则 ( )
A 1-≠x
B 1-=x
C 1≠x
D 1=x
15、下列分式中是最简分式的是 ( ) A
xy
x
2
B
xy
a 2 C
2
21++x x D
2
22y
xy y x ++
16、下列化简过程正确的是 ( ) A
4
21262
x x
x
=
B
y
x y
x y x +=
-+12
2
C
x
x x
x
x 312322
2
+=
+ D
23
62
+=---x x x x
三 简答题(每题6分,共24分) 17、化简:.1292
32
xy
y x 18、化简:
.2
2
y
x y x --
19、化简:.1
212
+--x x x 20、化简:
.)
1(232
2
-+-x x x
四 解答题(每题8分,共40分) 21、当2,3=-=y x 时,求分式y
x xy x +-222
的值。
22、计算:2
9)3(23
)3(3y
x x x y -⨯
-+ 23、计算:
.1
13
212
-+÷
-++x x x x x
24、计算:x
y x y
x y
xy x 22442
2
-÷
++-。
25、若长方体的长,宽,高分别用c b a ,,表示,长方体的体积用V 表示。
已知一个长方体的宽比长短2厘米,它的体积是15立方厘米。
(1)用a 表示这个长方体的高c ;
(2)当4=a 时,求这个长方体的高;
(3)若这个长方体的长,宽,高都是正整数,求它的长,宽,高;。