cha.3 选择题

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C语言程序设计习题集3

C语言程序设计习题集3
if(substr [【8】k+1]==’\0’)
{ num++ ; break ; }
return (num);
}
4下面函数的功能就是用递归法将一个整数存放到一个字符数组中,存放时按逆序存放,如483存放成“384”,请填空使程序完整。
void convert(char *a, int n)
{ int i;
A*pxBaCpxD&a
9若指针px为空指针,则_B__。。
A px指向不定B px的值为零C px的目标为零D px的地址为零
10对下语句int *px[10];,下面正确的说法就是_B__。
A px就是一个指针,指向一个数组,数组的元素就是整数型。
B px就是一个数组,其数组的每一个元素就是指向整数的指针。
A语句有错误B z值为68 Cz值为60 D z值为180
4以下程序运行后的输出结果就是_A__。
#define F(X,Y)(X)*(Y)
main()
{int a=3,b=4;
printf("%d\n",F(a++,b++));
}
A 12B15C16D 20
5以下程序运行后的输出结果就是_C__。
{int a[5]={2,4,6,8,10}, *p;
p=a; p++;
printf("%d", *p);
}
4以下程序的输出结果就是__55__。
#defineM5
#defineNM+M
main()
{int k;
k=N*N*5; printf("%d\n",k);

南通市2023-2024学年高三下学期高考适应性考试(三)数学试题+答案

南通市2023-2024学年高三下学期高考适应性考试(三)数学试题+答案

南通市2023-2024学年高三下学期高考适应性考试(三)数学试题一、単项选择题(本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项是符合题目要求的)1.已知集合{}2{1,2,3,4},log (1)2A B x x ==-∣…,则集合A B ⋂的子集个数为( ) A.32B.16C.8D.42.在梯形ABCD 中,//AB CD ,且2AB CD =,点M 是BC 的中点,则AM =( ) A.2132AB AD - B.1223AB AD + C.12AB AD +D.3142AB AD +3.721x ⎛⎫ ⎪⎝⎭的展开式的常数项为( )A.-21B.-35C.21D.354.国家二级文化保护遗址玉皇阁的台基可近似看作上、下底面边长分别为2m,4m ,侧棱长为3m 的正四棱台,则该台基的体积约为( )3 B.3C.328m35.在平面直角坐标系xOy 中,已知点(2,1)M 为抛物线2:2(0)E x py p =>上一点,若抛物线E 在点M 处的切线恰好与圆22:()2(0)C x y b +-=<相切,则b =( )A. B.-2C.-3D.-46.已知40,sin(),tan tan 225πβααβαβ<<<-=-=,则sin sin αβ=( )A.12 B.15C.25D.27.某校春季体育运动会上,甲,乙两人进行羽毛球项目决赛,约定“五局三胜制”,即先胜三局者获得冠军.已知甲、乙两人水平相当,记事件A 表示“甲获得冠军”,事件B 表示“比赛进行了五局”,则()P AB =∣( ) A.12B.14C.38D.5168.设定义域为R 的偶函数()y f x =的导函数为()y f x '=,若2()(1)f x x '++也为偶函数,且()2(24)1f a f a +>+,则实数a 的取值范围是( )A.(,1)(3,)-∞-⋃+∞B.(,3)(1,)-∞-⋃+∞C.(3,1)-D.(1,3)-二、多项选择题(本大题共3小题,每小题6分,共18分.在每个小题给出的选项中,有多项符合题目要求、全部选对的得6分,部分选对的得部分分,有选错的得0分)9.已知12,z z 都是复数,下列正确的是( ) A.若12z z =,则12z z ∈R B.若12z z ∈R ,则12z z = C 、若12z z =,则2212z z =D.若22120z z +=,则12z z =10.在数列{}n a 中,若对*n ∀∈N ,都有211n n n na a q a a +++-=-(q 为常数),则称数列{}n a 为“等差比数列”,q 为公差比,设数列{}n a 的前n 项和是n S ,则下列说法一定正确的是( ) A.等差数列{}n a 是等差比数列B.若等比数列{}n a 是等差比数列,则该数列的公比与公差比相同C.若数列{}n S 是等差比数列,则数列{}1n a +是等比数列D.若数列{}n a 是等比数列,则数列{}n S 等差比数列11.在棱长为2的正方体1111ABCD A B C D -中,点E 是棱1BB 的中点,点F 在底面ABCD 内运动(含边界),则( )A.若F 是棱CD 的中点,则//EF 平面1A BDB.若EF ⊥平面11AC E ,则F 是BD 的中点C.若F 在棱AD 上运动(含端点),则点F 到直线1A ED.若F 与B 重合时,四面体11AC EF 的外接球的表面积为19π三、填空题(本题共3小题,每小题5分,共15分.)12.已知函数2,0,()sin 2,0,6x x f x x x π⎧<⎪=⎨⎛⎫+ ⎪⎪⎝⎭⎩…则2f f π⎡⎤⎛⎫= ⎪⎢⎥⎝⎭⎣⎦_____________. 13.在平面直角坐标系xOy 中,12,F F 分别是双曲线22:145x y E -=的左,右焦点,设点P 是E 的右支上一点,则1251PF PF -的最大值为_____________. 14.定义:[x ]表示不大于x 的最大整数,{}x 表示不小于x 的最小整数,如[1.2]1,{1.2}2==.设函数(){[]}f x x x =在定义域()*[0,)N n n ∈上的值域为n C ,记n C 中元素的个数为n a ,则2a =___________,12111na a a +++=_____________.(第一空2分,第二空3分) 四、解答题(本大题共5小题,共77分.解答应写出文字说明,证明过程或演算步骤)15.(本小题满分13分)如图,正方形ABCD 是圆柱1O O 的轴截面,已知4AB =,点E 是AB 的中点,点M 为弦BE 的中点. (1)求证:O 1M ∥平面ADE ;(2)求二面角D —O 1M —E 的余弦值.16.(本小题满分15分)跑步是人们日常生活中常见的一种锻炼方式,其可以提高人体呼吸系统和心血管系统机能,抑制人体癌细胞生长和繁殖.为了解人们是否喜欢跑步,某调查机构在一小区随机抽取了40人进行调查,统计结果如下表.(1)根据以上数据,判断能否有95%的把握认为人们对跑步的喜欢情况与性别有关?附:22()()()()()n ad bc a b c d a c b d χ-=++++,其中n a b c d =+++.(2)该小区居民张先生每天跑步或开车上班,据以往经验,张先生跑步上班准时到公司的概率为3,张先生跑步上班迟到的概率为13.对于下周(周一~周五)上班方式张先生作出如下安排:周一跑步上班,从周二开始,若前一天准时到公司,当天就继续跑步上班,否则,当天就开车上班,且因公司安排,周五开车去公司(无论周四是否准时到达公司).设从周一开始到张先生第一次开车去上班前跑步上班的天数为X ,求X 的概率分布及数学期望()E X .17.(本小题满分15分)在ABC 中,角A ,B ,C 所对的边分别为a ,b ,c ,已知22,23a c BA BC ==⋅-,其中S 为ABC 的面积. (1)求角A 的大小;(2)设D 是边BC 的中点,若AB AD ⊥,求AD 的长. 18.(本小题满分17分)在平面直角坐标系xOy 中,点A ,B 分别是椭圆2222:1(0)x y C a b a b+=>>的右顶点,上顶点,若C 的离心率为且O 到直线AB (1)求椭圆C 的标准方程;(2)过点(2,1)P 的直线l 与椭圆C 交于M ,N 两点,其中点M 在第一象限,点N 在x 轴下方且不在y 轴上,设直线BM ,BN 的斜率分别为12,k k . ①求证:1211k k +为定值,并求出该定值; ②设直线BM 与x 轴交于点T ,求BNT 的面积S 的最大值. 19.(本小题满分17分)已知函数()e cos xf x ax x =--,且()f x 在[0,)+∞上的最小值为0. (1)求实数a 的取值范围;(2)设函数()y x ϕ=在区间D 上的导函数为()y x ϕ'=,若()1()x x x ϕϕ'⋅>对任意实数x D ∈恒成立,则称函数()y x ϕ=在区间D 上具有性质S .①求证:函数()f x 在(0,)+∞上具有性质S ;②记1()(1)(2)()ni p i p p p n ==∏,其中*n ∈N ,求证:111sin (1)ni i i n n =⋅>+∏.数学试题参考答案及评分标准一、单项选择题(本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项是符合题目要求的)二、多项选择题(本大题共3小题,每小题6分,共18分.在每个小题给出的选项中,有多项符合题目要求.全部选对的得6分,部分选对的得部分分有选错的得0分)三、填空题(本题共3小题,每小题5分,共15分.)121314.321 n n+四、解答题(本大题共5小题,共77分.解答应写出文字说明、证明过程或演算步骤)15.(本小题满分13分)(1)证明:取AE的中点N,连结DN,FN.在△AEB中,M,N分别是EB,EA的中点,所以MN∥AB,且AB=2MN.在正方形ABCD中,AB∥CD,且AB=CD,又点O1是CD的中点,所以O1D∥AB,且AB=2O1D.所以MN∥O1D,且MN=O1D,所以四边形MNDO1是平行四边形,………………………………3分所以O1M∥DN.又DN⊂平面ADE,O1M⊄平面ADE,所以O1M∥平面ADE.………………………………6分(2)解:因为AB是圆O的直径,E是AB的中点,且AB=4,所以OE⊥OB,且OE=OA=OB=2.以O为坐标原点,以OE,OB,OO1所在直线分别为x轴,y轴,z轴建立如图所示的空间直角坐标系O -xyz .依题意,O (0,0,0),O 1(0,0,4),B (0,2,0),E (2,0,0),M (1,1,0), A (0,-2,0),D (0,-2,4). ………………………………7分 所以()1114O M =-,,,()1020DO =,,,()1204O E =-,,. 设()1111n x y z =,,是平面O 1MD 的法向量,则111100n O M n DO ⎧⋅=⎪⎨⋅=⎪⎩,,即11114020x y z y +-=⎧⎨=⎩,,取x 1=4,得y 1=0,z 1=1,所以()1401n =,,是平面O 1MD 的一个法向量. ………………………………9分 设()2222n x y z =,,是平面O 1ME 的法向量,则212100n O M n O E ⎧⋅=⎪⎨⋅=⎪⎩,,即2222240240x y z x z +-=⎧⎨-=⎩,,取x 2=2,得y 2=2,z 2=1,所以()2221n =,,是平面O 1ME 的一个法向量.………………………………11分所以121212cos 4n n n n n n ⋅===⋅,. 设二面角D-O 1M -E 的大小为θ,据图可知,123cos cos 17n n ==,θ 所以二面角D -O 1M -E . ………………………………13分 16.(本小题满分15分)解:(1)假设H 0:人们对跑步的喜欢情况与性别无关. 根据题意,由2×2列联表中的数据, 可得()22401210810400.4040 3.8412020221899χ⨯⨯-⨯==≈<⨯⨯⨯, ………………………3分 因为()2 3.8410.050P =≥χ,所以没有95%认为人们对跑步的喜欢情况与性别有关联. ……………………5分 (2)X 的所有可能取值分别为1,2,3,4. ()113P X ==; ………………………7分 ()2122339P X ==⨯=; ………………………9分 ()2214333327P X ==⨯⨯=; ………………………11分()2228433327P X ==⨯⨯=, ………………………13分 所以()124865123439272727E X =⨯+⨯+⨯+⨯=. 所以X 的数学期望为6527. ………………………15分 17.(本小题满分15分)解:(1)据223c BA BC =⋅-,可得21cos sin 2c c a B ac B =⋅⋅-,即cos sin c a B B =,………………………2分 结合正弦定理可得sin sin cos sin C A B A B =.在△ABC 中,()()sin sin πsin sin cos cos sin C A B A B A B A B =-+=+=+⎡⎤⎣⎦, 所以sin cos cos sin sin cos sin A B A B A B A B+=,整理得cos sin sin A B A B =. ………………………4分因为()0πB ∈,,sin 0B >,故cos AA =,即tan A = 又()0πA ∈,,所以5π6A =. ………………………6分 (2)法一:因为D 是边BC 的中点,2a =,所以BD =CD =1.在△ABD 中,AB ⊥AD ,则AD =BD sin B =sin B . ………………………8分在△ACD 中,∠CAD =5π6-π2=π3,C =π-5π6-B =π6-B ,CD =1,据正弦定理可得,sin sin CD ADCAD C =∠,即1ππsin sin 36AD B =⎛⎫- ⎪⎝⎭, 所以π6AD B ⎛⎫- ⎪⎝⎭.………………………11分 所以πsin 6B B ⎛⎫=-⎪⎝⎭1cos 2B B B=, 所以cos B B =, ………………………13分又22sin cos 1B B +=,()0πB∈,, 所以()22sin 1BB +=,解得sin B=, 所以AD . ………………………15分 法二:因为D 是边BC 的中点,故S △ABD =S △ACD ,所以11sin 22c AD b AD DAC ⋅=⋅⋅∠,即115πsin π226c AD b AD ⎛⎫⋅=⋅⋅- ⎪⎝⎭,整理得c ①. ………………………10分 在△ABC 中,据余弦定理得,2222cos a b c bc BAC =+-∠,即224b c += ②.联立①②,可得b =c =. ………………………13分在Rt △ABD 中,据勾股定理得,22221113AD BD AB =-=-=,所以AD . ………………………15分 法三:延长BA 到点H ,使得CH ⊥AB .在Rt △CHB 中,AD ⊥AB ,CH ⊥AB ,故AD ∥CH , 又D 是BC 的中点,所以A 是BH 的中点,所以AH =AB =c ,CH =2AD ,且2224HB HC a +==.………………………10分 在Rt △CHA 中,5ππππ66CAH BAC ∠=-∠=-=,AC =b ,AH =c ,所以CH =b sin CAH ∠=12b ,且c =b cos CAH ∠=2b . ………………………12分所以()221242c b ⎛⎫+= ⎪⎝⎭,即221242b ⎛⎫⎛⎫+= ⎪ ⎪ ⎪⎝⎭⎝⎭,解得b =负舍),所以11112224AD CH b b ==⨯== ………………………15分法四:延长AD 到E ,使AD =DE ,连结EB ,EC . 因为D 是BC 的中点,且AD =DE ,故四边形ABEC 是平行四边形,BE =AC =b . 又5π6BAC ∠=,所以5ππππ66ABE BAC ∠=-∠=-=. 在Rt △BAE 中,AB ⊥AD ,π6ABE ∠=,AB =c ,BE =AC =b ,所以1sin 2AE BE ABE b =⋅∠=,且cos c BE ABE =⋅∠. ………………………10分 在Rt △BAD 中,AB ⊥AD ,AB =c ,AD =12AE =14b ,BD =12a =1,据勾股定理222AB AD BD +=,可得22114c b ⎛⎫+= ⎪⎝⎭,………………………13分将c =代入上式,可得b =负舍),所以14AD b ==. ………………………15分18.(本小题满分17分)解:(1)设椭圆C 的焦距为2c(c >0),因为椭圆Cc a =,即2234c a =, 据222a b c -=,得22234a b a -=,即2a b =. ………………………2分所以直线AB 的方程为12x yb b+=,即220x y b +-=, 因为原点O 到直线AB,=1b =, 所以2a =, ………………………4分所以椭圆C 的标准方程为2214x y +=. ………………………5分(2)设直线l 的方程为()12y k x -=,其中14k >,且1k ≠,即21y kx k =-+.设直线l 与椭圆C 交于点()11M x y ,,()22N x y ,. 联立方程组222114y kx k x y =-+⎧⎪⎨+=⎪⎩,,整理得()()22224116816160k x k k x k k +--+-=, 所以212216841k k x x k -+=+,2122161641k kx x k -=+. ………………………8分① 所以()()12121212121212111112222x x x x x x k k y y k x k x k x x ⎛⎫+=+=+=⋅+ ⎪------⎝⎭()()()()()12121212121212222224x x x x x x x x k x x k x x x x -+-+=⋅=⋅---++ 2222222222161616882241414144161616824414141k k k k kk k k k k k k k kk k k ----+++=⋅=⋅=----⨯++++为定值,得证.………………………11分② 法一:直线BM 的方程为11y k x =+,令0y =,得11x k =-,故110T k ⎛⎫- ⎪⎝⎭,. 设直线BN 与x 轴交于点Q .直线BN 的方程为21y k x =+,令0y =,得21x k =-,故210Q k ⎛⎫- ⎪⎝⎭,. 联立方程组222114y k x x y =+⎧⎪⎨+=⎪⎩,,整理得()22224180k x k x ++=, 解得2222841k x k =-+或0(舍),22222222222881114141k k y k x k k k ⎛⎫=+=⋅-+=-+ ⎪++⎝⎭. 所以△BNT 的面积22222221221228411111111224141B k k S QT y y k k k k k k ⎛⎫=-=-+--+=-+⋅ ⎪++⎝⎭,由①可知,12114k k +=-,故12114k k -=+,代入上式, 所以22222222224821424141k k S k k k k =+⋅=+⋅++, 因为点N 在x 轴下方且不在y 轴上,故212k <-或212k >,得2120k +>,所以()22222222222222222821842211244141414141k k k k k k S k k k k k +⎛⎫⎛⎫+-=+⋅==⋅=+ ⎪ ⎪++++⎝⎭⎝⎭, ………………………14分 显然,当212k <-时,2222141441k S k ⎛⎫-=+< ⎪+⎝⎭, 当212k >时,2222141441k S k ⎛⎫-=+> ⎪+⎝⎭, 故只需考虑212k >,令221t k =-,则0t >, 所以()2141414122112t S t t t ⎛⎫⎛⎫⎪⎡⎤ ⎪ =+=++=⎢⎥ ⎪ ++⎢⎥ ⎪⎣⎦++ ⎪ ⎝⎭⎝≤, 当且仅当2t t=,t =2k =时,不等式取等号,所以△BNT 的面积S的最大值为2. ………………………17分法二:直线BM 的方程为11y k x =+,令0y =,得11x k =-,故110T k ⎛⎫- ⎪⎝⎭,. 设直线BN 与x 轴交于点Q .直线BN 的方程为21y k x =+,令0y =,得21x k =-,故210Q k ⎛⎫- ⎪⎝⎭,. 由①可知,12114k k +=-,故12114k k --=, 所以点A (2,0)是线段TQ 的中点. 故△BNT的面积1222BAN S S AB d ==⨯⨯=△,其中d 为点N 到直线 AB 的距离. ………………………14分 思路1 显然,当过点N 且与直线AB 平行的直线'l 与椭圆C 相切时,d 取 最大值.设直线'l 的方程为()102y x m m =-+<,即220x y m +-=, 联立方程组221214y x m x y ⎧=-+⎪⎪⎨⎪+=⎪⎩,,整理得222220x mx m -+-=, 据()()2224220m m ∆=---=,解得m =正舍).所以平行直线'l:20x y ++=与直线l :220x y +-=之间的=d所以△BNT 的面积S2=.………………………17分思路2 因为直线l 的方程为220x y+-=,所以2222S x y ==+-,依题意,222x -<<,20x ≠,20y <,故22220x y +-<,所以()22222222S x y x y =+-=-++.因为()22N x y ,在椭圆C 上,故222214x y +=,即()222224x y +=, 所以()222222222222x y x y ++⎛⎫=⎪⎝⎭≤,当且仅当222x y ==等号,故222x y -+≤所以()22222S x y =-+++≤即△BNT 的面积S 的最大值为2.………………………17分思路3 因为直线l 的方程为220x y +-=,所以2222S x y ==+-,因为()22N x y ,在椭圆C 上,故222214x y +=, 设22cos x =θ,2sin y =θ,不妨设33πππ2π22⎛⎫⎛⎫∈ ⎪ ⎪⎝⎭⎝⎭,,θ,所以22π222cos 2sin 224S x y ⎛⎫=+-=+-=+- ⎪⎝⎭θθθ,当5π4=θ,2x =2y =2S ≤.即△BNT 的面积S 的最大值为2.………………………17分19.(本小题满分17分)解:(1)()e cos x f x ax x =--,0x ≥,()00e 0cos00f a =-⨯-=, ()'e sin x f x a x =-+,()0'0e sin 01f a a =-+=-,()''e cos 1cos 0x f x x x =++≥≥,等号不同时取,所以当0x ≥时,()''0f x >,()'f x 在[)0+∞,上单调递增,()()''01f x f a =-≥. (ⅰ)若10a -≥,即1a ≤,()'10f x a -≥≥,()f x 在[)0+∞,上单调递增, 所以()f x 在[)0+∞,上的最小值为()00f =,符合题意. ………………………3分 (ⅱ)若10a -<,即1a >,此时()'010f a =-<,()()'ln 22sin ln 2210f a a +=++>->⎡⎤⎡⎤⎣⎦⎣⎦,又函数()'f x 在[)0+∞,的图象不间断, 据零点存在性定理可知,存在()()00ln 2x a ∈+,,使得()'0f x =,且当()00x x ∈,时,()'0f x <,()f x 在()00x ,上单调递减, 所以()()0'00f x f <=,与题意矛盾,舍去.综上所述,实数a 的取值范围是(]1-∞,. ………………………6分 (2)① 由(1)可知,当0x >时,()0f x >.要证:函数()f x 在()0+∞,上具有性质S . 即证:当0x >时,()()'1x f x f x ⋅>.即证:当0x >时,()()'0x f x f x ⋅->.令()()()'g x x f x f x =⋅-,0x >,则()()()e sin e cos x x g x x a x ax x =⋅-+---, 即()()1e sin cos x g x x x x x =-++,0x >,()()'e cos 0x g x x x =+>, 所以()g x 在()0+∞,上单调递增,()()00g x g >=. 即当0x >时,()()'0x f x f x ⋅->,得证. ………………………11分 ② 法一:由①得,当0x >时,()1e sin cos 0x x x x x -++>,所以当0x >时,()1e sin x x x x x -<+.下面先证明两个不等式:(ⅰ)e 1x x >+,其中0x >;(ⅱ)sin cos x x x<,其 中()01x ∈,. (ⅰ)令()e 1x p x x =--,0x >,则()'e 10x p x =->,()p x 在()0+∞,上单 调递增,所以()()00p x p >=,即当0x >时,e 1x x >+.(ⅱ)令()tan q x x x =-,()01x ∈,,则()2221sin '10cos cos x q x x x=-=>, 所以()q x 在()01,上单调递增,故()()00q x q >=, 即当()01x ∈,时,tan x x >,故sin cos x x x >,得sin cos x x x<. ………………………13分据不等式(ⅱ)可知,当()01x ∈,时,()11e sin cos sin x x x x x x x x ⎛⎫-<+<+ ⎪⎝⎭, 所以当()01x ∈,时,()21sin e 1x x x x x ->+.结合不等式(ⅰ)可得,当()01x ∈,时, ()()()()()()()222111111sin e 1111x x x x x x x x x x x x x x x x --+-+->>>=++++. 所以当()01x ∈,时,sin 11x x x x->+. ………………………15分 当2n ≥,*n ∈N 时,()101n∈,,有1111sin 111n n n n n n -->=++. 所以()2112312sin 34511n i n i i n n n =-⋅>⋅⋅⋅⋅=++∏. 又π11sin1sin62⋅>=, 所以()()11121sin 211n i i i n n n n =⋅>⋅=++∏. ………………………17分 法二:要证:()111sin 1ni i i n n =⋅>+∏. 显然,当1n =时,()π11sin1sin 6111⋅>=⨯+,结论成立. 只要证:当2n ≥,*n ∈N 时,()()1111sin 111n n n n n n n n+->=+-. 即证:当2n ≥,*n ∈N 时,1111sin 11n n n n ->⋅+. ………………………13分 令()()1sin 1x x h x x x -=-+,102x ⎛⎤∈ ⎥⎝⎦,. 所以()()22'cos 11h x x x =-++,()()34''sin 1h x x x =-++, 所以()()412'''cos 01h x x x =--<+,()''h x 在102⎛⎤ ⎥⎝⎦,上单调递减, 所以()1321''''sin 02272h x h ⎛⎫=-> ⎪⎝⎭≥,()'h x 在102⎛⎤ ⎥⎝⎦,上单调递增, 所以()()''00h x h >=,()h x 在102⎛⎤ ⎥⎝⎦,上单调递增,所以()()00h x h >=,即当102x ⎛⎤∈ ⎥⎝⎦,时,()1sin 1x x x x ->+. ………………………15分所以当2n ≥,*n ∈N 时,1102n ⎛⎤∈ ⎥⎝⎦,,有111111sin 111n n n n n n n -->⋅=⋅++, 所以当2n ≥,*n ∈N 时,11sin1n n n n ->+. 所以()12111112311sin 1sin sin 1234511n n i i n i i i i n n n ==-⎛⎫⋅=⋅⋅⋅>⋅⋅⋅⋅⋅= ⎪++⎝⎭∏∏. ………………………17分。

国家开放大学本科《人文英语3》一平台机考真题及答案(第二套)

国家开放大学本科《人文英语3》一平台机考真题及答案(第二套)

国家开放大学本科《人文英语3》一平台机考真题及答案第二套说明:整理于2024年8月6日;适用于国家开放大学本科学员一平台期末机考考试;前5个题相同则整套相同。

第一部分,试题原题第_大题、交际用语(单选题)本大题共包含5小题,每小题2分,共计10分。

阅读对话,从A、B、C三个选项中选择一个能填入空白处的最佳选项。

1.-Try motivating Tony to cooperate by rewarding his good behavior.A.I fs easier said than done,but I will tryB.N o,but sometimes he just isn't reasonableC.D o not always punish him fbr little things like bad moods2.-1’m so sorry fbr breaking your cup.-Oh,,Fve got a lot of cups.A.h elp yourselfB.m y pleasureC.forget it3.-HOW do you feel about your family life?A.G ood.Ifs a good choice to work thereB.N ot bad.I think it is a good choice to be a full-time motherC.N ot bad.I have visited their family a lot of times4.-I am taking care of my grandmother this year.A.I t is not an easy job,isn't it?B.Being a good listener is very important,C.She gets upset easily,and resists my suggestions.5.-Could you please help me choose an Mp4player online?-.My computer doesn,t work.A.I don't agreeB.I hope soC.I'm afraid I can't第二大题、词汇与结构(单选题)本大题共包含15小题,每小题2分,共计30分。

【上下册衔接】专题01 字音辨析-2022-2023学年三年级语文上册寒假专项提升(部编版)

【上下册衔接】专题01 字音辨析-2022-2023学年三年级语文上册寒假专项提升(部编版)

【寒假专项提升】专题01 字音辨析一、上册拼音复习要点。

1.背诵、默写26个大小写字母表。

2.掌握汉语拼音23个声母、24个韵母、16个整体认读音节。

熟练、准确地拼读音节,借助汉语拼音识字。

读准声调,按汉语拼写规则给音节标调,会读轻声,认识隔音符号等。

3.能读准平舌音和翘舌音,不认识的汉字,会用部首查字法,还能巧辨多音字。

二、上册拼音知识盘点。

1.《汉语拼音字母表》(26个)Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo PpQq Rr Ss Tt Uu Vv Ww Xx Yy Zz2.声母(23个)b p m f d t n l g k h j q x zh ch sh r zc s3.韵母(24个)a o e i u ü ai ei ui ao ou iu ie üe er an ang en eng in ing un ün ong4.整体认读音节(16个)zhi chi shi zi ci si ri yi wu yu ye yue yin ying yuan yun5.声调(1)声调的分类:阴平(ˉ),阳平(ˊ),上声(ˇ),去声(ˋ),轻声(不标调)(2)声调的标法:先标a 、o、e ,再标 i 、u、ü。

若遇iu和ui,标在尾巴上。

轻声不标调号。

6.拼音方法(1)两拼法。

如:zha扎针、cha喝茶,sha傻笑。

平翘舌发音容易混淆。

(方法是对比练习)(2)三拼法(声轻介快韵母响)。

如:g—u—ā→guā(瓜) n—i—ǎo→xiǎ(小)(3)直呼音节法。

如:看到一个音节不再进行拼读,而直接读出字音。

(整体认读音节不要拼读直呼。

)7.y、w的作用和使用方法(1)所谓“加”是指在i、u、ü开头的音节前加y或w。

(2)所谓“换”是指i、u后还有其他的元音,这时要把i换成y,把u换成w。

1.读准平舌音和翘舌音。

操作系统试题

操作系统试题

操作系统试题第1部分概述一、选择题1.在分时系统中,当用户数为50时,为了保证响应时间不超过1秒,选取的时间片最大值为 B 。

A :10ms B:20ms C:50ms D:100ms2.下列关于并发的叙述中正确的是 C 。

A:并发是指多个事件在同一时刻发生。

B:并发是指一个事件在多个时刻发生。

C:并发是指多个事件在同一时刻间隔内发生。

D:并发是指一个事件的发生触发了另一个事件。

二、填空题1.操作系统与用户的接口可分为命令(shell)与系统调用两种方式。

2.操作系统的四个主要功能有处理机管理、内存管理、文件管理和设备管理。

3.多个事件在同一时刻发生称为并行,多个事件在同一时刻间隔内发生称为并发。

4.在单处理机环境下的多道程序,宏观上可以同时(并发)运行,微观上则是交替(串行)运行。

三、简答题第2部分进程管理一、选择题1.下列叙述中正确的是 C 。

A:临界资源不能共享。

B:对临界资源应采取同时访问方式来实现共享。

C:对临界资源应采取互斥访问方式来实现共享。

D:只要是并发执行的程序,就可以共享临界资源。

2.在进程调度中,为了照顾短进程用户,应采取 B 调度算法;为了使紧急任务能得到及时处理,应采取 E 调度算法;为了使交互型进程具有合理的响应时间,应采取 C 调度算法;能使长进程、短进程及交互型进程的用户都能接受,应采取 D 调度算法。

A:先来先服务 B:短进程优先C:时间片轮转D:多级反馈队列E:基于优先级剥夺二、填空题1.不能被多个进程同时访问的资源称为临界资源,为实现这种资源的共享,应采取互斥访问方式。

2.正在执行的进程因时间片用完而被暂停执行,此时应变为就绪状态;正在执行的进程因等待某一事件而进入阻塞状态,当事件到时应变为就绪状态。

3.下列关于进程调度的叙述中正确的是 D 。

A:CPU繁忙型进程的优先级应高于I/O繁忙型进程的优先级。

B:资源要求多的进程,其优先级应高于资源要求少的进程。

C:在引入动态优先级的系统中,随着进程等待时间的增加,其优先级将随之降低。

语音专项训练题(一)及答案

语音专项训练题(一)及答案

语音专项训练题(一)及答案语音(一)翠园中学俞式清编1、下列词语中与范例字字音同一的一项是(d )a、拗ǎo 拗断拗口执拗拗口令b、扳bān 扳本扳机扳手扳登c、薄báo 薄饼薄脆单薄薄弱d、背bēi 背榜背带背负背黑锅2、下列词语中与范例字字音同一的一项是(a )a、背bèi 背叛背诵背景背运b、奔bèn 奔驰奔波奔命奔头儿c、绷bēng 绷带绷簧绷脸绷硬d、扁biān 扁担扁率扁舟扁骨3、下列词语中与范例字字音同一的一项是(a d)a、别bié别称别号别离别集b、屏bíng 屏幕屏障屏除屏弃c、伯bǎi 伯父大伯伯公伯仲d、魄pò落魄魂魄魄力胆魄4、下列词语中与范例字字音同一的一项是(c )a、参cān 参合参校参量参差b、藏zàng 宝藏西藏矿藏玄藏c、侧cè侧记侧面侧目侧棱d、差cāi 出差差遣差使差错5、下列词语中与范例字字音同一的一项是(b )a、禅chán 禅林禅机禅让禅宗b、颤chàn 颤动颤抖颤音颤悠c、倘tǎng 倘或倘然倘若倘佯d、朝cháo 朝奉朝野朝气朝昏6、下列词语中与范例字字音同一的一项是(c )a、称chèn 称心称职称便称许b、乘shèng 史乘野乘千乘之国乘便c、重chóng 重版重叠重合重茧d、种zhòng 种地种花种植种族7、加点字的注音完全正确的一项是(d )a、应届(yìng)编纂(zuǎn)唁电(yán)弓弦(xián)b、魍魅(mèi)窥测(kuī)星宿(sù)愤懑(mān)c、脊梁(jǐ)瓦砾(jì)呼号(hào)强(qiǎng)求d、哺育(bǔ)谄媚(chán)迸发(bèng)腼腆(tiǎn)8、下列词语中与范例字字音同一的一项是(b )a、仇chóu 仇敌仇杀仇隙仇姓b、处chǔ处罚处置处治处士c、畜chù畜力畜疫畜牧畜养d、揣chuǎi 揣测揣摩揣度囊揣9、下列词语中与范例字字音同一的一项是(ad )a、传chuán 传播传抄传讯传奇b、创chuàng 创造创立创始创伤c、从cōng 从容从军从事从新d、弹dàn 弹道弹丸弹片弹坑10、下列词语中加点字读音全部正确的一项是(c )a、龟裂(jūn)整饬(chì)膛(zhēng)目内讧(hòng)b、饕餮(táotiè)韬(tāo)略掮(qián)客龌龊(wòchuó)c、分娩(miǎn)蹊(qī)跷濒(bīn)临遴(lín)选d、谙(ān)习反省(séng)倩(qiàn)影怂恿(sóngyǒng)多音多义字是语音考察的重点,为帮助考生有效复习,在此辑录108个常见多音多义字,并组成意思连贯的句子,供考生们练习。

上海市徐汇区2022-2023学年高二下学期3月月考数学试题含解析

上海市徐汇区2022-2023学年高二下学期3月月考数学试题含解析

若 CH 面 OAHB , HA, HB 面 OAHB ,则 CH HA,CH HB ,

H

HA
a,
HB
b

OA

a
上,
OB

b
上,
OA,
OB

OAHB

则 CH
OA,CH
OB
,即 CH
a,CH
b ,
又 HA CH H , HA,CH 面 CHA ,则 a 面 CHA ,即 OA 面 CHA ,
由 CA 面 CHA ,故 OA CA ,同理证 OB CB ,
又 cos AOH OA OH
2 2
, cos COH
OH OC
, cos COB
OB OC
32 10

所以 cos COH
cos COB
3
,即 sin COH
4

cos AOH 5
5
而 ma
nb 表示面 OAHB
上的任意点,要使
a
6,1,
m
与向量
b
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n,1
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所以
a
b
,则
6 2 1 n m
,解得
3
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m 3
,所以
m
n
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故答案为:1.
9. 已知事件 A 与 B 互斥,它们都不发生的概率是 1 .且 P A 3P B ,则 P A ______. 5 【答案】 2 ## 0.4
5
【解析】
数是______.
241
【答案】120.5##
2
【解析】

2024年四川省泸州市中考数学试卷(附答案)

2024年四川省泸州市中考数学试卷(附答案)

2024年四川省泸州市中考数学试卷(附答案)一、选择题(本大题共12个小题,每小题3分,共36分.在每小题给出的四个选项中,只有一项是符合题目要求的).1.(3分)下列各数中,无理数是()A.B.3.14C.0D.π2.(3分)第二十届中国国际酒业博览会于2024年3月21﹣24日在泸州市国际会展中心举办,各种活动带动消费2.6亿元,将数据260000000用科学记数法表示为()A.2.6×107B.2.6×108C.2.6×109D.2.6×10103.(3分)下列几何体中,其三视图的主视图和左视图都为矩形的是()A.B.C.D.4.(3分)把一块含30°角的直角三角板按如图方式放置于两条平行线间,若∠1=45°,则∠2=()A.10°B.15°C.20°D.30°5.(3分)下列运算正确的是()A.3a+2a3=5a4B.3a2•2a3=6a6C.(﹣2a3)2=4a6D.4a6÷a2=4a36.(3分)已知四边形ABCD是平行四边形,下列条件中,不能判定▱ABCD为矩形的是()A.∠A=90°B.∠B=∠C C.AC=BD D.AC⊥BD7.(3分)分式方程﹣3=的解是()A.x=﹣B.x=﹣1C.x=D.x=38.(3分)已知关于x的一元二次方程x2+2x+1﹣k=0无实数根,则函数y=kx与函数y=的图象交点个数为()A.0B.1C.2D.39.(3分)如图,EA,ED是⊙O的切线,切点为A,D,点B,C在⊙O上,若∠BAE+∠BCD=236°,则∠E=()A.56°B.60°C.68°D.70°10.(3分)宽与长的比是的矩形叫做黄金矩形,黄金矩形给我们以协调、匀称的美感.如图,把黄金矩形ABCD沿对角线AC翻折,点B落在点B′处,AB′交CD于点E,则sin∠DAE的值为()A.B.C.D.11.(3分)已知二次函数y=ax2+(2a﹣3)x+a﹣1(x是自变量)的图象经过第一、二、四象限,则实数a的取值范围为()A.1≤a<B.0<a<C.0<a<D.1≤a<12.(3分)如图,在边长为6的正方形ABCD中,点E,F分别是边AB,BC上的动点,且满足AE=BF,AF与DE交于点O,点M是DF的中点,G是边AB上的点,AG=2GB,则OM+FG的最小值是()A.4B.5C.8D.10二、填空题(本大题共4小题,每小题3分,共12分).13.(3分)函数y=的自变量x的取值范围是.14.(3分)在一个不透明的盒子中装有6个白球,若干个黄球,它们除颜色不同外,其余均相同.若从中随机摸出一个球是白球的概率是,则黄球的个数为.15.(3分)已知x1,x2是一元二次方程x2﹣3x﹣5=0的两个实数根,则(x1﹣x2)2+3x1x2的值是.16.(3分)定义:在平面直角坐标系中,将一个图形先向上平移a(a>0)个单位,再绕原点按逆时针方向旋转θ角度,这样的图形运动叫做图形的ρ(a,θ)变换.如:点A(2,0)按照ρ(1,90°)变换后得到点A'的坐标为(﹣1,2),则点B(,﹣1)按照ρ(2,105°)变换后得到点B'的坐标为.三、本大题共3个小题,每小题6分,共18分。

linux练习题

linux练习题

Unix/Linux操作系统分析一、填空1、操作系统内核运行在一定的上下文中,一般来说,处理器在任何时间点上的活动范围可以被概括为三种情况:运行在空间,处于进程上下文,代表某个特定的进程的执行;运行在空间,处于中断上下文,表示处理某个特定中断;运行在空间,执行用户进程。

(cha1,p5)2、操作系统内核主要划分为两大设计阵营:和。

大多数Unix系统都属于前者,而Windows NT以及Mach则属于后者。

Linux则兼取二者之长。

(cha1, p5)3、Linux内核源码一般安装在目录下。

(cha2, p8)4、内核把进程存在一个被称作的双向循环链表中,链表的每一项都是类型为task_struct、被称作的结构,该结构在<linux/sched.h>文件中定义。

(cha3, p17)5、内核通过一个惟一的来标识每个进程。

它其实是一个整数,默认最大为32768,即系统中允许同时存在的进程的最大数目。

(cha3, p19)6、在Linux系统中,进程创建通常是调用系统调用的结果,该系统调用通过复制一个现有进程来创建一个全新的进程,这实际上是由clone()系统调用实现的。

(cha3, p16)7、系统中运行的进程根据资源消耗,可分为和。

Linux为保证用户交互式应用更倾向于优先调度前者。

(cha4, p )8、进程在被抢占前所能运行的时间被称作,当它耗尽时,认为该进程到期了。

(cha 4, p )9、负责对对称多处理及系统的可执行队列之间的负载进行均衡,由kernel/sched.c中的函数load_balance()实现;10、在Linux下编写程序,一般有两个工具最为常用的编辑工具:和emacs。

(Linux)11、Linux下最为广泛使用的C语言编译器是。

它是GNU推出的功能强大、性能优越的跨平台编译器。

C语言的调试工具是,它们都是GNU软件的代表作。

(Linux)12、Linux下,用户空间访问内核需要通过实现。

初二下unit3练习题

初二下unit3练习题

初二下unit3练习题第一部分:选择题1. 下面哪个选项的单词在字母拼写上是正确的?a) recieveb) believec) acheived) reciept2. 请选择正确的词性和词义:a) He is a great dancer.b) He dances great.3. 以下哪个选项中的短语用法是正确的?a) break upb) break atc) break offd) break for4. 在下列句子中,哪个动词要用现在完成时态?a) I have read this book last night.b) She has been studying French for five years.c) He did his homework yesterday.d) They saw the movie yesterday.5. 下列选项中哪个词用法不正确?a) knowledgeb) informationsc) fruitsd) interesting第二部分:填空题1. My friend and I _______ (play) basketball every weekend.2. I _______ (be) to Paris twice.3. The cat _______ (eat) all the fish.4. What _______ (you/do) yesterday?5. They _______ (not/go) to the party last night.第三部分:阅读理解阅读下面的短文,然后选择正确的答案。

Last weekend, my family and I went to the zoo. We saw many different animals there. The weather was sunny and warm, so it was a perfect day for a visit.First, we went to see the monkeys. They were swinging from tree to tree and eating bananas. They looked very happy. Next, we visited the lion enclosure. The lions were sleeping, so we did not see them move.After that, we went to the elephant area. There was a show where the elephants were doing tricks. They were very clever and could balance balls on their trunks. It was amazing to watch.Finally, we went to the penguin house. The penguins were swimming in the water and playing with each other. They looked so cute and funny. I wished I could swim like them.1. What was the weather like when the author visited the zoo?a) Sunny and warmb) Rainy and coldc) Cloudy and windyd) Snowy and icy2. Where did the author see the monkeys?a) In the lion enclosureb) In the penguin housec) In the elephant aread) In the zoo restaurant3. What were the elephants doing in their show?a) Singing songsb) Eating bananasc) Running aroundd) Doing tricks4. What were the penguins doing in the water?a) Sleepingb) Eating fishc) Swimming and playingd) Balancing balls5. How did the author feel about the penguins?a) Annoyedb) Sadc) Happyd) Angry第四部分:写作题请根据以下提示写一篇70-80个词的短文。

词汇学1-3

词汇学1-3

1、选择题 10题 20% 前三章概念2、填空题 5题 15% 前三章3、搭配题 10% 前四章4、名词解释题 5题 10% 如 loan words prefix5、简答题课后问题How why what 15%6、分析题提供一个单词对此词做出分析15%评论题用例子评论观点是否正确 15%题型例如一、选择题:1. The following are all nominal suffixes EXCEPT( ) . A. –fulEnglish and ( ) belong to the Germantic branch of the Indo-European language family. B. Danishadded to the end of words to indicate Grammatik relationships are known as ( )morphemes. C. inflectionalattached to other morphemes to create new words are known as ( ) affixes. B .derivational二、.Complete the following statements with proper words or expressions 填空题1. affixation Is the formation of new words by adding prefixes to bases .2. Almost all affixes are bound morphemes because few as independent words.三、配对四、Define the following terms. 名词解释题五、Answer the following questions,简答题Why should students of English lexicology study the Indo-European Language FamilyThe Indo-European Language Family is one of the most important language families in the world.It is made up of most of the languages of Europe, the Near East and India. English belongs to this family and the other members of the Indo-European Language Family have differentdegrees of influence on English vocabulary. A knowledge of the Indo-European Language Family will help us understand English words better and use them more appropriately.六、1. Analyze the morphological structures of the following words and point out the types of the morphemes.1Destructive de+struct+tive 2antibiotic anti+bio+tic3composition com+po+si+tion 4unbearable un+bear+able5international inter+nation+nal 6ex-prisoner ex+prison+er2. The word “deer” originally meant “animal”, but now it refers to a specific animal. What kind of word-meaning change has the word experiencedWhat accounts for the change of word-meaning1) The word “deer” has experienced narrowing or specialization of meaning.2) The narrowing of word-meaning is caused by the influx of borrowings, one of the major linguistic factors leading to the change of word-meaning. The word “deer” originally meant “animal”, and later the word “animal” from Latin and the word “beast” from French found their way into English. As the three terms were synonymous, “animal” retai ned the original meaning, the meaning of “deer” was narrowed and “beast” changed in colour.Chapter 1: a word may be defined as a fundamental unit of speech and minimum free form; with a unity of sound and meaning (both lexical and grammatical meaning), capable of performing a given syntactic function.A word is(1)a minimal free form of a language;(2)a sound unity;(3)a unity of meaning;(4)a form that can function alone in a sentence.A word is a minimal free form that has a given sound and meaning and syntactic functionA word is a smallest unit of a language.is the language of a highly colloquial type, considered as below the level of standard educated speech, and consisting either of new words or of current words used in some social sense.are the terms peculiar to a class, sect, trade or profession.means the vocabulary peculiar to the underworld.5.Classification of English Words According to Different CriteriaBy origin:native words ,borrowed wordsBy usage:common words,literary words,colloquial words,slang words,technical words By notion:function words,content wordsnative words features:1. All-national character Every English person uses the words of the native element.2. Great stability The native element lives for centuries providing the English with a basisfor theformation of new words.3. Monosyllabic The native element in Modem English is mostly monosyllabic.4. Word-forming ability The great stability and semantic peculiarities of Anglo-Saxon wordsaccount for the great word building power.5. Wide collocability Many native words enter quite a number of set expressions, idioms, phrasesand proverbial sayings.6. Plurality of meanings Most of the native words have undergone striking transformations insemantic structure, and are nowadays highly polysemantic7. High frequency value The native element (words of Anglo-Saxon origin) forms the bulk ofthe most frequent elements used in any style of speech8. Stylistically neutral Most native words are stylistically neutral.Classification of the borrowed words:Aliens: are words borrowed from a foreign language without any change of the foreign sound and spelling. From French: elite, coupéDenizens: are foreign words which have been conformed to native English in accent, spelling and even in adoption of an English affix, or words made up of two parts both fromforeign soil.get (a Scandinavian borrowing)theater (a French loan) sociology (socio- from French and -logy from Greek)Translation-Loans: are words and expressions formed from the material already existing in English, but according to patterns taken from another language, by way ofliteral morpheme-for-morpheme translation. black humour (from Frenchhumor noir)found object (from French object trouve)Semantic Loan words: are words of a new meaning due to the influence of a related word inanother language, or words which acquired new meanings under theinfluence of language or languages other than the source tongue.(gift meant “the price of a wife” in Old English and after the semanticborrowing of the meaning of gift or present of the Scandinavian termgipt, it meant and still means “gift” in the modern sense of it. )Classification of English Words by usageCommon words are connected with the ordinary things or activities necessary to everyday life. Literary words are chiefly used in writing, especially in books written in a more elevated style, in official documents, or in formal speeches. They are comparatively seldom used in ordinary conversation. In English, most of the literary words are of French, Latin or Greek origin. For example,cast (throw), edifice(building), endeavor(try), purchase(buy), etc. More examples: recognition, distinction, inclination, dubious, amelioration…colloquial words or expressions are used mainly in spoken English, as in conversation among friends and colleagues. They can also be use in informal writings, but are inappropriate in formal speeches or writings. They are marked colloq. or informal in dictionaries. Such as: kid, guy, fellow, gay…区别literary word and colloquial word and common worda.Feeling fatigued, Tom retired early. (literary)b.Tom felt so dog-tired he hit the sack early. (colloquial)c.John was dismissed for petty thieving. (common)d.John was fired for petty thieving. (colloquial)a.Penalties for overdue books will be strictly enforced. (literary)b.You have got to pay fines for overdue books. (colloquial)c.They approved of the plan. (literary)d.They agreed to the plan.(common)Slang word is defined as language, words or phrases of a colorful, humorous, or taboo nature, invented for specific occasions, or uses, or derived from the unconventional use of the standard vocabulary. The chief reason for the formation and use of slang expressions is to secure freshness and novelty.Technical words refer to those words used in particular disciplines and academic areas. = terminologies or technical terms. symphony, sonata, orchestra, concerto,audiovisual, microteaching,algebra, geometry, calculus,clone, embryo, cell , organism, DNA(deoxyribonucleicacid), geneFunction words(or grammatical words or autosemantic words) are words that have little lexicalmeaning or have ambiguous meaning, but instead serve to express grammatical relationships withother words within a sentence, or specify the attitude or mood of the speaker. Function wordsmight be prepositions, pronouns, auxiliary verbs, conjunctions, grammatical articles or particles,all of which belong to the group of closed-class words.Content words: Words that are not function words are called content words (or open class wordsor lexical words). Include nouns, verbs, adjectives, and most adverbs, although someadverbs are function words ., then and why).a. sub-standard words often used on informal occasions ( slang )b. specialized vocabulary common in certain professions ( jargon )c. words used by sup-cultural groups especiallyby underground society (argot )d. words that have rich notions ( content words )e. words of Anglo-Saxon origin( native words )f. words borrowed by way of translation ( translation loans )g. old words with new meanings( neologisms )h. foreign words which have become assimilated ( denizens )i. words whose meanings are borrowed (semantic loans)j. words essential to native speakers daily communication(dialectal words 本地语)配对 tart: loose woman bloke: fellow gat: pistol swell: great chicken: coward blue: fight smoky: police full: drunk dame: woman beaver: girlChapter 2Modern English Words : Borrowing& NeologismBorrowing: From French: attach, caféFrom Italian: concert, duet, piano, soprano, solo, tenor, model, bust, studio, dome,balcony, in the fields of music, art, architectureFrom Spanish: armada, cargo, vanilla, cocoa, cigarFrom Portuguese: caste, pagodaFrom German: bismuth, cobalt, nickel, zincFrom Dutch: dock, freight, keelFrom Russian: vodka, troika, ruble, tsarFrom Australian: boomerang, kangaroo, dingoFrom Arabic: sugar, sultan,alcoholFrom Indian: coolie, cashmere, khakiFrom Chinese: tea, typhoon, yamenFrom Japanese: kimono, tycoonFrom African: gorilla, zebraNeologisms are newly coined words or words that are given new meaning to fit new situation because of social, economic, political, cultural, scientific and technological changes in human society. Neologisms: moonfall登月, space suit太空服, black hole黑洞, environmentalist环保人士, software软件 visual pollution视觉污染, data base 数据库 green revolution 绿色革命 clone 克隆nanotechnology纳米技术 income gap收入差距 Euro欧元 Watergate水门事件netspeak 网络词汇 distance education 远程教育 TV dinner 电视便餐/速冻食品feminism 女权主义 teach-in 讨论会/时事宣讲会, hippies嬉皮士 soul music 黑人音乐the lost generation迷惘的一代 talk shows 脱口秀 Karaoke (Japanese),black humor (French), paper tiger, Red Guards, Kungfu, tofu, wok, typhoon (Chinese). chapter 3One morpheme: nationTwo morphemes: nation-alThree morphemes: nation-al-izeFour morphemes: de-nation-al-izedecentralization de-, center, -al, -ize, -ationspecialize species, -al, -izeindividualistic in-, divide, -al, -ist, -ichalf-hearted half, heart, -edundeveloped -un, develop, -edsupernatural -super, nature, -alinequality -in, equal, -ityIn word-formation, morphemes are labeled root, stem, base and affix.root 词根:所有曲折词缀和派生词缀被去掉后所剩余的部分 stem 词干:所有的曲折词缀被去掉后所剩余的部分morphemebase 词基:任何一种词缀都可加在上面的形式inflectional affix 曲折词缀affix 词缀derivational affix 派生词缀词根与词基的区别:词基可派生词缀,词根不可以进一步分析词基可加派生词缀与曲折词缀,词根只可加曲折词缀是词根(不可再分解)desire(v.) 是词干(可以加曲折词缀,如过去时ed)是词基是词基(可加词缀,又能再分解,able是派生后缀)desirable(adj.) 不是词根(它可再分解)不是词干(不可加曲折词缀)不是词根(可再分解—)undesirable (n.) 是词干,可加曲折词缀,如-s,是词基Morpheme is the smallest meaningful linguistic unit of language, not divisible or analyzable into smaller forms.Root is the basic unchangeable part of a word, and it conveys the main lexical meaning of the word.. work, workable, worker, worked,workingFree roots(free morphemes)自由词素,可以独立成词are forms that can stand alone as words such as boy, moon, walk, black.Bound root(bond morpheme) :粘着词素,即必须依附于另一个词素For example. -tain ,contain,detain ,sustain ,retain Affixes词缀are forms that are attached to words or word elements to modify meaning or function. Inflectional affixes曲折词素,放在单词后一般表示语法行为attached to the end of words to indicate grammatical relationships are inflectional, thus known asinflectional morphemes. cats, walked, walking , John’s bookDerivational affixes派生词素,形成新词并可能改变词性are added to other morphemes to createnew words. They can be further divided into prefixes and suffixes.Prefix 前缀are affixes that come before the word, such as pre+war, sub+seaSuffix后缀 : Affix comes after the word.Allomorph : 词素变体An allomorph is any of the variant forms of a morpheme as conditioned by position or adjoining sounds. . the morpheme of plurality {-s}: /s/ after thesounds /t, p, k//z/ after /d, b, g, l/; /iz/ after /s, z, …/A prefix like im- occurs before p, b, or m (imperfect, imbalance, immobile). Itsallomorphs areir-before r (irregular, irresponsible);il- before l(illogical,illegal);in- before all other consonants and vowels (inflexible, incomplete).Native affixes are those that existed in the OE period or were formed from OE words, such as un-, mis-, be-, out-, over-, -ness, -dom, -hood, -ly, –er. undemocratic ,Foreign affixes came as a part of loan words from Latin, Greek, French, or other languages. Examples: ab-(L), bi-(L), dis-(L), re-(L), kilo-(Gk), poly-(Gk), mal-(F), -ic(Gk), -ism(Gk),-ist(Gk), -able (F), -ize(F).1) a minimum meaningful unit of a language (morpheme)2) one of the variants that realize a morpheme (allomorph)3) a morpheme that occurs with at least one other morpheme(bound morpheme)4) a morpheme that can stand alone (free morpheme )5) a morpheme attached to a stem or a root (affix )6) an affix that indicates grammatical relationships ( informational affix)7) an affix that forms new words with a base,stem or a root (derivational affix )8) what remains of a word after the removal of all affixes (root )9) a form to which affixes of any kind can be added ( b ase)10)that part of a word that can take inflectional affixes(stem)chapter4negative prefixes :apolitical,destabilize,declassify,disenfranchise ,disinvest,illegal,irresponsible,imperceptible,non-economic ,non-party,unacceptable,non-negative prefixes : hyperlink,hypertext,overestimate ,overcompensate,semi-annual,supermarket,superintendant,ultra-secret,ultra-conservative,embark ,enclose,external,ex-wife ,inter-American ,inter-government,postgraduate,preliminary,autonomy,miscalculation1. Noun-forming suffixes-age: passage, marriage, mileage -dom: freedom, kingdom-ance/-ence: assistance, predominance, correspondence-ee: employee, referee, absentee -eer/er: engineer, profiteer, manager-ess: manageress, heiress -ist: economist-hood: adulthood, singlehood -ing: building, meaning, packing-ion/-sion/-tion/-ition/-ation: production, conclusion, realization-ism: consumerism, perfectionism -ment: agreement, investment-ness: effectiveness, kindness -ship: ownership, friendship-ty/-ity: productivity, prosperity -ure/-ture: procedure, expenditure2. Adjective-forming suffixes-able/-ible: manageable, permissible -al/-tal/-ial/-tial: economical, statistical -ant/-ent: redundant, dependent -ary: monetary, inflationary-ate/-ete: accurate, complete -ful: dutiful, powerful-ish: snobbish, reddish, bookish -ive: effective, extensive-less: effortless, powerless -like: businesslike, lifelike-ly: costly, orderly -ous/-ious: ambiguous, nutritious-some: troublesome, worrisome -y: sexy, worthy, daddy3. Verb-forming suffixes-en: brighten, moisten -ify/-fy: intensify, qualify, liquefy, glorify -ize/-ise: rationalize, advertise, stabilize*‘ize’ is often used in American English . maximize) as an alternative spelling of ‘ise’ in British English . maximise).4. Adverb forming suffixes-ly: frequently, perfectly -ward/-wards: windward, backward, homewards -wise: vote-wise, percentage-wise, housingwise*Words formed with ‘ward’ can usually be used as either adverbs or adjectives. Words formed with ‘wards’ are mainly used as adverbs . westward, westwards).Modern suffixes:1. mega- (very large) : negacity megadestruction megagame megastructure megarichmegaversity(automatic/computerized): cyberculture cyberbrain cyberart cyber-securitycyber-space cyber-privacy(super/too much): hypermedia hyperlinks hyperfriction hyperslow hyberverbal4. info- (information): infotech infocenter infotainment infomercial5. nano- (one billionth): nanotech nanofabrication nanocomputer(technology): technomania technophobia techno-centric7. tele- (long-distance transfer/television): telead telrbanking telebus telecentertele-education8. e- (electronic) : e-mail e-text e-zine e-cash9. -bot (robot): knowbot mobot microbot10. -size (measurements) : downsize upsize rightsize life-size11. -ware (articles of the same kind): glassware soft/hardware middleware silverwarewarehouse(of the center/taking…as the center): user-centric male-centric net-centric warIBM compatible-centricchapter1 简答题1. What is a word2. What is the relationship between words and vocabulary3. What are the characteristics of the basic vocabulary4. What is the fundamental difference between content words and functional words5. How do you account for the role of native words in English in relation to loan wordschapter2 简答题1. Why should students of English lexicology study the Indo-EuropeanLanguage FamilyThe Indo-European Language Family is one of the most important language families in the world. It is made up of most of the languages of Europe, the Near East and India. English belongs to this family and the other members of the Indo-European Language Family havedifferent degrees of influence on English vocabulary. A knowledge of the Indo-European Language Family will help us understand English words better and use them more appropriately.2. What are the fundamental differences between the vocabularies of the threeperiods of developmentDo you think we can divide the historical development in other waysDefend your argument.The vocabularies of the three periods differ greatly from one another.Old English has (1) a small vocabulary (50,000—60,000), (2) a small number of borrowings from Latin and Scandinavian only and (3) the words full of endings.Middle English has (1) a comparatively large vocabulary, (2) a tremendous number of foreign words from French and Latin and (3) word endings leveled.Modern English has (1) a huge and heterogeneous vocabulary, (2) tremendous borrowings and(3) words with lost endings.Yes, we can divide the development in other ways, for example, Old English period can be called Anglo-Saxon period. And Middle English might start from 1066 the time of Norman Conquest. But in doing so, the logical continuation of the three phases of the original division is lost.3. What characteristics of English make the English language heterogeneousIt is receptivity and adaptability of the English language that make it possible for English to borrow heavily from other major languages of the world, so that the English vocabulary eventually has become heterogeneous.chapter3简答题is the difference between morph形素, morpheme词素, allomorphs词素变体Morph: A morpheme must be realized by discrete units. These actual spoken minimal carriers of meaning are morphs.Morpheme :A morpheme is the smallest meaningful unit of a language. (The smallest functional unit in the composition of words.)An allomorph is any of the variant forms of a morpheme as conditioned by position or adjoining sounds. . the morpheme of plurality {-s}:are the ways of creating new morphemesis the difference between grammatical and lexical morphemes, and inflectional and derivational morphemes Give examples to illustrate their relationships.Inflectional morphemes are the suffixes added to the end of words to denote grammatical concepts such as -s(-es), -ed, -ing and -est(to show superlative degree of adjectives and adverbs) whereas derivational morphemes are prefixes and suffixes added to words to form new words such as pre-, dis-, un-, -tion, -er, -ness and so on.Grammatical morphemes are those used to show grammatical concepts, including reflectional suffixes as mentioned above and functional words (prepositions, pronouns, articles, auxiliary verbs), for example, but, the, do and was; lexical morphemes are derivational affixes including both prefixes and suffixes.。

互换性与技术测量课后习题

互换性与技术测量课后习题
(1) (2) (3)
(4) (5)
5.有下列三组孔与轴相配合,根据给定的数值,试分别确定它们的公差等级,并选用适当的配合。
(1)配合的基本尺寸=25mm,Xmax=+0.086mm,Xmin=+0.020mm.
(2)配合的基本尺寸=40mm,Ymax=-0.076mm,Ymin=-0.035mm.
测量平面


测量平面


测得的单一内径尺寸
dsmax=40
dsmax=40.003
测得的单一内径尺寸
Dsmax=90
Dsmax=89.987
dsmin=39.992
dsmin=39.997
Dsmin=89.996
Dsmin=89.985
2.有一D306滚动轴承(公称内径d=30mm,公称外径D=72mm),轴与轴承内圈配合为js5,壳体孔与外圈的配合为J6,试画出公差带图,并计算出它们的配合间隙与过盈以及平均间隙或过盈。
(3)配合的基本尺寸=60mm,Ymax=-0.032mm,Xmax=+0.046mm.
chap2长度测量基础
1.试从83块一套的量块中,同时组合下列尺寸(单位为mm):29.875,48.98,40.79,10.56.
2.仪器读数在20mm处的示值误差为+0.002mm,当用它测量工件时,读数正好为20mm,问工件的实际尺寸是多少?
6.3-6所示零件的技术要求是:①法兰盘端面A对 孔的轴线的垂直度公差为0.015mm;② 圆周上均匀分布的 孔,要求以 孔的轴线和法兰盘端面A为基准能互换装配,位置度公差为 。试用形位公差代号标出这些技术要求。
7. 小包容区域、定向最小包容区域与定位最小包容区域三者有何差异?若同一要素需同时规定形状公差、定向公差和定位公差时,三者的关系应如何处理?

互换性与技术测量课后习题

互换性与技术测量课后习题

绪言1. 试写出R10从250到3150的优先数系。

2. 试写出R10/3从0.012 到100的优先数系的派生数系。

3. 试写出R10/5从0.08到25的优先数系的派生数系。

Chap1圆柱公差与配合1.计算出表中的极限尺寸,上、下偏差和公差,并按国家标准的规定标注基本尺2.已知下列三对孔、轴相配合。

要求:(1) 分别计算三对配合的最大与最小间隙(X max ,X min )或过盈(Y max ,Y min )及配合公差。

(2) 分别绘出公差带图,并说明它们的类别。

a) 孔:033.0020+φ轴:065.0098.020--φ b) 孔:007.0018.035+-φ 轴:0016.035-φ c) 孔:030.0055+φ轴:060.0041.055++φ3.下列配合中,查表1-8,表1-10,表1-11确定孔与轴的最大与最小间隙或过盈以及配合公差,画出公差带图,并指出它们属于哪种基准制和哪类配合? (1)7850f H φ (2)101080h G φ (3)6730h K φ (4)88140r H φ (5)67180u H φ (6)5618h M φ 4.将下列基孔(轴)制配合,改换成配合性质相同的基轴(孔)制配合,并查表1-7,表1-10,表1-11,确定改换后的极限偏差。

(1)9960d H φ (2)7830f H φ (3)6750h K φ (4)6730h S φ (5)6750u H φ 5.有下列三组孔与轴相配合,根据给定的数值,试分别确定它们的公差等级,并选用适当的配合。

(1) 配合的基本尺寸=25mm,X max =+0.086mm,X min =+0.020mm. (2) 配合的基本尺寸=40mm,Y max =-0.076mm,Y min =-0.035mm. (3) 配合的基本尺寸=60mm,Y max =-0.032mm,X max =+0.046mm.chap2长度测量基础1. 试从83块一套的量块中,同时组合下列尺寸(单位为mm ):29.875,48.98,40.79,10.56.2. 仪器读数在20mm 处的示值误差为+0.002mm ,当用它测量工件时,读数正好为20mm ,问工件的实际尺寸是多少?3. 用某测量方法在等精度的情况下对某一试件测量了15次,各次的测得值如下(单位为mm ): 30.742, 30.743, 30.740, 30.741, 30.739, 30.740, 30.739, 30.741, 30.742, 30.743, 30.739, 30.740, 30.743, 30.742, 30.741, 求单次测量的标准偏差和极限误差。

宏观经济学 cha3消费、投资与净出口需求

宏观经济学 cha3消费、投资与净出口需求

3.1.5 实际利率与现期消费
2. 实际利率的变动对单个消费者现期消费的影响
以龙先生为假想居民来讨论两期消费计划的选择:
设龙先生现期的收入为Y1元,未来的收入为Y2元。又设现期的物价水平为P元,从现在到未来的物价
上涨率为π,储蓄名义利率为NR。于是,易知龙先生现期收入全部用于现期消费的消费量为ω1= ,未
MPS= 由于增加的收入要么用于增加消费ΔC,要么用于增加储蓄ΔS,即
ΔC+ΔS=ΔYd 上式等号两边同除以ΔYd即可得到:
MPS+MPC=1(3.2) 即边际储蓄倾向与边际消费倾向互补。并且,由边际消费倾向递减知,边际 储蓄倾向满足递增规律。由此推断,高收入者的边际消费倾向一般低于低 收入者,高收入者增加的收入中较少的部分用于消费,较多的部分进行储蓄。
长期比例与短期非比例消费函数的协调
推动非比例消费函数曲线上移(相当于 截距项a增大),抵消了边际消费倾向 MPC随收入增长而出现的下降,从而使 消费与收入在长期内保持同比变动的关 系,APC呈现固定不变的稳定趋势。
该图描绘了斯密塞斯的观点:截距 a3>a2>a1推动消费函数曲线上移,抵消 了斜率b3<b2<b1的下降,从而使C1、 C2、 C3与Y1、 Y2、 Y3按同比例β增长。
MPC=
人们发现,边际消费倾向满足递减规律,即随着居民收入水平的提高,其增加 的收入中用于增加消费开支所占的比例下降。
3.1.1 凯恩斯简单消费函数理论:现期收入与消费
相应地,边际储蓄倾向(Marginal Propensity of Saving,简称MPS)指居民增加 的收入中用于增加储蓄的比例。即
3.1.3 弗里德曼的恒久性收入说
3. 恒久性消费与暂时性消费

三年级语文知识竞赛试题

三年级语文知识竞赛试题

三年级语文知识竞赛试题万事(。

)万无(。

)得一无一失无长物3、根据提示,填写正确的词语。

(10分)A、这个字是由“日”和“月”组成的,表示“夜晚”。

B、这个字是由“口”和“日”组成的,表示“吃”的意思。

C、这个字是由“木”和“目”组成的,表示“树”的果实。

D、这个字是由“金”和“子”组成的,表示“一种动物”。

E、这个字是由“土”和“耳”组成的,表示“一种植物”。

4、按要求写出下列词语的反义词。

(10分)A、干净→(。

)B、快乐→(。

)C、高兴→(。

)D、强壮→(。

)E、爱→(。

)5、根据所给汉字,写出相应的拼音。

(10分)A、鲤(。

)B、葵(。

)C、瓢(。

)D、蝴(。

)E、蜻(。

)6、根据所给的词语,写出相应的汉字。

(10分)A、yóu yǒng(。

)B、tǐ yàn(。

)C、jiàn kāng(。

)D、tú shū(。

)E、shū fǎ(。

)三、阅读理解题。

(26分)阅读下列短文,根据短文内容回答问题。

A爷爷是一位退休教师,他喜欢种花。

花园里有许多种花,有玫瑰、牡丹、月季、菊花等。

每天早晨,爷爷都会去花园浇水、施肥、修剪花枝。

他说:“花儿是需要人们的关爱和呵护的,只有这样它们才会茁壮成长,开出美丽的花朵。

”1、爷爷的爱好是什么?2、爷爷的花园里有哪些花?3、爷爷每天早晨都做些什么?4、为什么爷爷要关心花儿?B小明是一个爱读书的孩子,他每天都会读好多书。

他读过的书有《西游记》、《红楼梦》、《三国演义》等。

他说:“读书可以开拓视野,增长知识,让我变得更加聪明。

”1、小明是一个怎样的孩子?2、小明读过哪些书?3、读书有什么好处?三年级语文知识竞赛试题一、选择题,将正确答案的序号填在题后的括号里。

(24分)1、给下列带点字的四组注音中,正确的一组是(。

)挑衅影片自个.儿当差.的A、tiaopiangechaB、tiaopiangechaiC、tiaopiangechai2、下列多组词语,搭配完全正确的一组是(。

2024年三年级下学期英语课堂练习题答案解析附录

2024年三年级下学期英语课堂练习题答案解析附录

一、选择题(每题 2 分,共20 分)1.( )A. chairB. boatC. woman2.my ______ to school on Mondays. ( )A. goB. goesC. going3.( )A. he B. in C. she4.Who’s that lovely baby? —He is my brother. ( )A. B. C.5.Nine and nine makes______. ( )A. thirteenB. fifteenC. eighteen6.Is this ________ lunch box? ( )—No, it isn’t. My lunch box is white.A. yourB. myC. his7.—Who's that woman? ( )— _______is my mother.A. SheB. HeC. It8.Look at the ostrich (鸵鸟). It has ______legs and a ______tail. ( ) A. short; long B. long; short C. short; short9.( )A. shirtB. skirtC. dress10.ere’s ______ orange for you. ( )A. anB. aC.二、判断题(每题 3 分,共15 分)11.判断句子与图片是(T)否(F)相符:This is a baby. ()12.阅读下面的短文,判断正(T)误(F)I’m Li Hua. I’m a boy. I’m thin. I’m from Chaling. I’m a student. I’m nine years old. I like watermelons. I have many toy cars. Look, my toy car is on the desk. Li Fang is my sister. She’s six. She’s a student, too. She likes strawberries. We are in the same(相同的) school.1.Li Hua is thin. ()2.Li Hua has many toy boats. ()3.Li Hua and Li Fang like strawberries. ()4.Li Fang is a boy. ()5.Li Fang is a student, too. ()13.判断句子与图片是(T)否(F)相符:Is he a postman? ()14.判断对话与图片是(T)否(F)相符:—Do you like grapes? —Sorry, I don’t like them.()15.判断每组对话是(T)否(F)符合日常交际:—Whose skirt is this? —It’s green. ()三、填空题(每题 2 分,共20 分)16.—How old are you?—I’m .17.(pplea)18.Don't ________ to Bob. (look / listen)19.(dotcor)20.I’m (完全形式) ______21.yes(反义词)________________22.—How ______ (nice / old) is he?—He’s six.23.toy (复数) ______24.I am(缩写形式)_____________25.______ (That / That’s) your pen.四、情景交际(每题 5 分,共20 分)26.当你想看看同桌的新彩笔时,你会说:( )A. May I have a look?B. Can I help you?27.假如你的铅笔找不到了,你会说:( )A. Who is pencil?B. What is my pencil?C. Where is my pencil?28.班上来了新同学,你对他表示欢迎时,你这样说:_______ ( )A. Welcome!B. Come here, children!29.“问候对方你好吗?”,可以这样问:( )A. I’m fine.B. How are you?五、连词成句(每题10 分,共10 分)30.①it ②Is ③the ④chair ⑤under (只写序号)_____________?六、选出每组单词画线部分发音不同的一项(每题 5 分,共15 分)31.( )A. it B. driver C. ship32.( )A. he B. leg C. pen33.( )A. mop B. gut C. bun参考答案一、选择题1.C【解析】【详解】A椅子,B船,C女人,图中是男人,选项C和图片同类,都是人,故选C。

小学拼音音节试题及答案

小学拼音音节试题及答案

小学拼音音节试题及答案一、选择题1. 下列哪个字的拼音音节是“zi”?A. 子B. 苏C. 猪D. 汉2. 下列哪个字的拼音音节是“cha”?A. 查B. 美C. 茶D. 日3. 下列哪个字的拼音音节是“guo”?A. 果B. 土C. 来D. 走4. 下列哪个字的拼音音节是“xi”?A. 西B. 哈C. 山D. 十5. 下列哪个字的拼音音节是“ji”?A. 睡B. 见C. 四D. 家二、填空题1. 将下列拼音音节补充完整。

a. _ib. _oc. _ud. _an2. 将下列字的读音补充完整。

a. _ab. _uc. _id. _ee. _o三、连线题将拼音音节与相应的拼音字母进行连线。

a. _a 1. ib. _u 2. ac. _i 3. od. _o 4. u四、判断正误题判断下面的句子是否正确,正确的将括号内的“√”填入,错误的则填入“×”。

( ) 拼音音节是学习拼音的重要一环。

( ) 拼音字母和拼音音节是一样的概念。

答案:选择题: 1. A 2. C 3. A 4. A 5. D填空题: 1. a 2. a, ou, ie, ai, u连线题: a-2 b-4 c-1 d-3判断题:√ ×总结:本文提供了小学拼音音节试题及答案,旨在帮助学生加强对拼音音节的理解和记忆。

试题包括选择题、填空题、连线题和判断题,涵盖了拼音音节的不同组合和读音。

通过练习这些试题,学生可以巩固拼音音节的掌握程度,并提高拼音的准确性。

对于选择题和填空题,学生需要根据已掌握的拼音知识,选择正确的拼音音节或填入正确的拼音字母。

连线题能够帮助学生培养对拼音音节与拼音字母的联想和记忆能力。

判断题则通过判断正误,查漏补缺,加深对拼音音节的理解。

通过这些试题的练习,学生可以提高对拼音音节的辨识能力,培养正确的拼音习惯。

同时,老师和家长也可以利用这些试题及答案来进行学生的复习和测试,帮助他们巩固拼音知识,提高学习效果。

初二英语单三练习题

初二英语单三练习题

初二英语单三练习题一、选择填空1. — _____ is your father?— He is a doctor.A. WhereB. WhatC. HowD. Who2. I’m from New York, so English is my ______ language.A. firstB. secondC. foreignD. native3. — Do you like rap music?—No, I don’t. I prefer ______ music.A. classicalB. popC. rockD. jazz4. My older brother is very_______. He often helps me with my homework.A. friendlyB. cleverC. helpfulD. outgoing5. Tina ______ TV every day, but she ______ watch it on Sundays.A. watches; doesn’tB. doesn’t watch; doesn’tC. doesn’t watch; isn’tD. watches; isn’t6. — Did you visit the Great Wall yesterday?— ______, because it rained all day.A. Yes, I didB. No, I didn’tC. Yes, I amD. No, I’m not7. — How often do you go shopping with your friends?— _________.B. Twice a weekC. Yes, I doD. Thanks a lot8. —You should ______ a coat. It’s cold outside. — OK, Mom.A. put onB. put upC. put awayD. put off9. — ______ will the movie start?— At 7:30.A. WhatB. WhyC. WhenD. Where10. I ______ to the library last night.A. wentB. goD. have gone二、完形填空In the Three Gorges, you can see lots of beautiful mountains, forests and11 . 12 can take you to the top of the mountains. From there you can havea nice view of the whole Three Gorges. You can also go boating on the river. You can hear the birds singing and see fish swimming 13 you.The Three Gorges Dam is very 14 . It’s one of the biggest and highest 15 ever built. It is over 2,000 meters long and about 180 meters high.The dam is not only for people to visit, but for people to use. It can produce a lot of electricity. It can also prevent floods from coming.The Three Gorges Dam is a very 16 place. Many visitors from different 17 visit there each year.I think if you visit the Three Gorges, you will like to visit it again because it’s a nice pl ace for people to 18 .11. A. animalsB. flowersC. treesD. birds12. A. CarsB. BusesC. BoatsD. Bicycles13. A. behindB. in front ofC. besideD. under14. A. bigB. smallC. dangerousD. beautiful15. A. villagesB. mountainsC. riversD. dams16. A. goodB. popularC. commonD. clean17. A. citiesB. countriesC. placesD. continents18. A. danceB. liveC. playD. visit三、阅读理解AAre you going to visit China? Let’s go to Shanghai. It’s a beautiful city in China. There are many things to see and do in Shanghai.First, you can visit the Oriental Pearl TV Tower. It’s famous in China. You can go up to the top floor of it. Then, you can see a nice view of Shanghai.Second, you can go shopping on Nanjing Road. It’s the most popular shopping street in Shanghai. You can buy clothes, shoes, food and many other things there.Third, you can take a boat along the Huangpu River. You can see many beautiful buildings along the river. The famous buildings are the Peace Hotel, the Jinmao Tower, and the Shanghai Tower.If you want to eat something good, you can go to the Yuyuan Garden. There are many tasty Chinese snacks and foods. You will like them.1. Where is Shanghai?A. In Japan.B. In America.C. In China.2. What can you see if you go up to the top floor of the Oriental Pearl TV Tower?A. A nice view of Shanghai.B. Many beautiful buildings.C. The Peace Hotel.3. What can you do on Nanjing Road?A. Buy clothes and shoes.B. Eat Chinese food.C. Visit Yuyuan Garden.4. What are the famous buildings along the Huangpu River?A. The Oriental Pearl TV Tower.B. The Peace Hotel.C. The Shanghai Tower.BTom and Ann are twins. They both have short hair and big eyes. They look the same. They also have the same hobbies. They both like swimming and playing chess. They are good at these two things.But they are different in some ways. Tom is very tall and thin. He likes wearing glasses. He thinks they make him look more clever. Ann is short and a little fat. She often wears a blue hat. She thinks it looks nice on her.In school, they are in the same class. They often play games with their classmates. They help each other with their homework. They are very friendly to everyone.1. What do Tom and Ann have in common?A. They look the same.B. They look different.C. They have different hobbies.2. What does Tom look like?A. Tall and thin.B. Short and a little fat.C. Short and thin.3. What does Ann often wear?A. Glasses.B. A blue hat.C. A blue coat.4. What are Tom and Ann like to their classmates?A. Friendly.B. Funny.C. Clever.解答:一、选择填空1. B2. A3. A4. C5. A6. B7. B8. A9. C10. A二、完形填空11. C12. C13. B14. A15. D16. B17. B18. D三、阅读理解A1. C2. A3. A4. BB1. A2. A3. B4. A。

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《统计学》补充作业
第三章补充习题
1、落在某一特定类别或组中的数据个数称为()
A频数 B频率 C频数分布表 D累积频数
2、一个样本或总体中各个部分的数据与全部数据之比称为()
A频数 B频率 C比例 D比率
3、样本或总体中各不同类别数值之间的比值称为()
A频数 B频率 C比例 D比率
4、将比例乘以100得到的数值称为()
A频率 B百分数 C比例 D比率
5、下面的哪一个图形最适合描述结构性问题()
A条形图 B饼图 C雷达图 D直方图
6、下面的哪一个图形适合于比较研究两个或多个样本或总体的结构性问题()
A环形图 B饼图 C直方图 D茎叶图
7、将全部变量值依次划分为若干个区间,并将这一区间的变量值作为一组这样的分组方法称为()
A单变量值分组 B组距分组 C 等距分组 D 连续分组
8、组中值是()。

A一个组的上限与下限之差B一个组的上限与下限之间的中点值
C一个组的最小值D一个组的最大值
9、下面的图形中最适合描述一组数据分布的图形是()
A 条形图
B 箱线图 C直方图 D饼图
10、对于大批量的数据,最适合描述其分布的图形是()
A 条形图
B 茎叶图
C 直方图 D饼图
11、对于小批量的数据,最适合描述其分布额图形是()
A 条形图
B 茎叶图
C 直方图 D饼图
12、对于时间序列数据,用于描述起变化趋势的图形通常是()
A条形图 B 直方图 C 箱线图 D线图
13、为描述身高与体重之间是否有某种关系,适合采用的图形是()
A条形图 B 对比条形图 C 散点图 D 箱线图
14、气泡图主要用于描述()
A 两个变量之间的相关关系 B三个变量之间的相关关系
C 两个变量的对比关系
D 三个变量的对比关系
15、为了研究多个不同变量在不同样本间的相似性,适合采用的图形是()
A 环形图
B 茎叶图 C雷达图 D 箱线图
16、10家公司的月销售额数据(万元)分别为:72,63,54,54,29,26,25,23,23,20。

下列哪种图形不
宜用于描述这些数据()。

A 茎叶图
B 散点图 C条形图 D饼图
17、下面是描述一组数据的一个图形,这个图是()。

A 饼图
B 直方图 C散点图 D茎叶图
1 0
2 8
2 0 5 5 7 9
3 1 3 5 6 8 8
4 4 4 6 8
18、与直方图相比,茎叶图()。

A 没保留原始数据的信息
B 保留原始数据的信息
C 不能有效展示数据的分布
D 更适合描述分类数据
19.下面的哪个图形不适合描述分类数据()
A.条形图
B.饼图
C.帕累托图
D.茎叶图
20.下面的哪个图形适合描述顺序数据()
A.直方图
B.茎叶图
C.累积频数分布图
D.箱线图
21.将某企业职工的月收入依次分为2000元以下,2000元----3000元、3000---4000元、4000元---5000元、5000元以上几个组,第一组的组中数近似为()
A.2000
B. 1000
C.1500
D.2500
22. 将某企业职工的月收入依次分为2000元以下,2000元----3000元、3000---4000元、4000元---5000元、5000元以上几个组,最后一组的组中数近似为()
A.5000
B. 7500
C.5500
D.6500
23.直方图与条形图的区别之一是()
A.直方图的各矩形通常是连续排列的,而条形图则是分开排列的
B.条形图的各矩形通常是连续排列的,而直方图则是分开排列的
C.直方图主要用于描述分类数据,条形图则主要用于描述数值型数据
D.直方图主要用于描述各类别数据的多少,条形图则主要用于描述数据的分布。

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