2019-2020学年度学校10月月考卷-2f6dbbf45fed4aff8ae510910e4ac0de
【月考试卷】2019-2020学年高一10月月考英语试卷及答案
2019-2020学年高一10 月月考英语试卷命题人:高一英语备课组本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)。
共100分,考试时间90分钟。
第Ⅰ卷(选择题共80分)第一部分听力(共两节,满分20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. Why doesn't the woman want to wear the coat?A. The style is old.B. The color is ugly.C. The quality(质量)isnot good.2. When is the man flying to Paris?A. On February 5thB. On February 10thC. On February I5th3.What will the man do tomorrow?A Go hiking.B Stay at home. C. See a doctor.4. How much did the jeans cost before the sale?A. 30 dollarsB. 50 dollarsC. 60 dollars5. Where does the man's uncle live?A. In New York B In London C. In Paris第二节听下面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,听每段对话或独白前,你将有时间阅读各个小题,每小题5抄钟: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、7题。
6. What did the man study in university in New York?A. BusinessB. Teaching C Computer7. Where was the man born?A. In London B In Sydney. C In New York听第7段材料,回答第8、9题。
2019_2020学年高一英语10月份四校联考试题201911260191
2019-2020学年高一英语10月份四校联考试题本试卷分第Ⅰ卷和第Ⅱ卷,总分120分,考试时间120分钟。
注意:请将答案统一写在答题卡上,否则不得分Ⅰ卷第一部分听力(共两节,每题1分,满分20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 does the man advise the woman to wear?A. A suit.B. A uniform.C. A black dress.2. Where does the conversation probably take place?A. In a restaurant.B. In a hospital.C. In a shop.3. How many classes does the man have?A. Four.B. Three.C. Five4. What does the woman want the man to do?A. Take her bike away.B. Go out with her.C. Repair her bike.5. Who likes music that has great lyrics?A. The woman.B. The man.C. Both of them.第二节听下面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,你有时间阅读各个小题,每小题5秒钟;听完后,各小题给出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和第7两个小题。
6. Where does the woman want to go?A. The nearest hospital.B. The supermarket.C. The nearest subway station.7. How long does it take to go to the destination on foot?A. Ten minutes.B. Five minutes.C. Twenty minutes.听第7段材料,回答第8至9题。
2019-2020学年度人教版八年级数学第一学期10月月考试题及答案
2019-2020学年度八年级数学第一学期10 月月考试卷(本检测题满分:120分,时间:100分钟)姓名:班别:分数:一、选择题(每题3分,共30分)1. 以下列各组长度的线段为边,能构成三角形的是( )A.7,3,4B.5,6,12C.3,4,5D.1,2,32. 等腰三角形的一个外角是80°,则其底角是()A.100°B.100°或40°C.40°D.803.一个多边形的每一个外角都等于40°,那么这个多边形的内角和为()A.1260°B.1080°C.1620°D.360°4.用一批完全相同的多边形地砖铺地面,不能进行镶嵌的是()A.正三角形B.正方形C.正六边形D.正八边形5.下列说法正确的是()A.三角形的角平分线、中线及高都在三角形内B.直角三角形的高只有一条.C.三角形至少有一条高在形内D.钝角三角形的三条高都在形外.6.一个多边形的内角和比它的外角的和的2倍还大180°,这个多边形的边数是()A.5B.6C.7D.87.在下图中,正确画出AC边上高的是().B BB BEA E C A C E A C E A C(A)(B)(C)(D)8.如图所示,∠A、∠1、∠2的大小关系是()A. ∠A ∠1∠2B.∠2∠1∠AC. ∠A ∠2∠1D.∠2∠A ∠19. 给出下列命题:⑴三角形的一个外角一定大于它的一个内角.⑵若一个三角形的三个内角之比为1:3:4,它肯定是直角三角形⑶三角形的最小内角不能大于60°⑷三角形的一个外角等于和它不相邻的两个内角的和其中真命题的个数是()(A)1个(B)2个(C)3个(D)4个10.如图1,把△ABC纸片沿DE折叠,当点A落在四边形BCDE内部时,则∠A与∠1+∠2之间有一种数量关系始终保持不变.请试着找一找这个规律,你发现的规律是()A.∠A=∠1+∠2B.2∠A=∠1+∠2C .3∠A=2∠1+∠2D .3∠A=2(∠1+∠2)二、填空题(每题 4 分,共 24 分)11.为了使一扇旧木门不变形,木工师傅在木门的背面 加钉了一根木条,这样做的道理是. 12.已知等腰三角形的两边长是 5cm 和 11cm ,则它的周长是_______13.一个等腰三角形的周长为 18,已知一边长为 5,则其他两边长为 ___. 14.已知一个三角形的三条边长为 2、7、 x ,则 x 的取值范围是 _______. 15.如图所示,AB∥CD,∠ABE=66°,∠D=54°,则∠E 的度数为 .16.如图,∠A +∠B +∠C +∠D +∠E +∠F=.AEBFABCECDD15 题16 题三、解答题(共 66 分) ABC 17.已知△ABC 中,为钝角.请你按要求作图(不写作法,但要 保留作图痕迹):(1)过点 A 作 BC 的垂线 AD;AC(2)作 的角平分线交 AC 于 E; B(3)取 AB 中点 F,连结 CF .18.在△ABC 中,∠A-∠B=∠B-∠C =15°求∠A 、∠B 、∠C 的度数.19.如图,在△ABC 中,两条角平分线 BD 和 CE 相交于点 O ,若∠BOC=116°,求∠A 的度数AEODC 20.△ABC 中,AB=AC ,AC 上的中线 BD 把△ABC 的周长分为 24 ㎝和 30 ㎝两部分19,题求三角形 的三边长.A BC B21.已知:如图,在△ABC中,∠BAC=900,AD⊥BC于D,AE平分∠DAC,∠B=500,求∠AEC的度数.AB D E C22.如图,ABC中,ABC=BAC,BAC的外角平分线交BC的延长线于点D,若ADC=12CAD,求ABC的度数。
2019-2020学年高三数学10月月考试题.doc
2019-2020学年高三数学10月月考试题注意事项:1.答题前,考生务必用黑色碳素笔将自己的考号、姓名、考场、座位号、班级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的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。
在试卷上作答无效。
第Ⅰ卷(选择题,共60分)一.选择题:本大题共12小题,每小题5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.=0330cos ( ) A.23B. 23-C.21D.21-2.已知复数z 满足i zi +-=1,则z 在平面直角坐标系中对应的点是( ) A.()1,1- B.()1,1- C.()1,1 D.()1,1--3.已知集合{}11|≤≤-=x x A ,{}02|2>-=x x x B ,则()=B C A U ( ) A.[-1,0] B.[1,2] C.[0,1] D.(-∞,1]∪[2,+∞) 4.已知向量()2,1=,()m ,4-=,若b a +2与a 垂直,则m =( ) A.-3 B.3 C.-8 D.85.正项等比数列{}n a 中,23=a ,6464=⋅a a ,则2165a a a a ++的值是( )A.4B.8C.16D.646.已知双曲线C :()0,012222>>=-b a by a x 的渐近线方程为x y 43±=,且其左焦点为(-5,0),则双曲线C 的方程为( )A .116922=-y x B .191622=-y x C .14322=-y x D .13422=-y x 7.已知某个几何体的三视图如下,根据图中标出的尺寸(单位:cm ),可得这个几何体的体积是( ) A .34000cm 3B .38000cm 3C .32000cmD .34000cm8.右图程序框图输出S 的值为( ) A.2 B.6 C.14 D.309.将函数()()ϕ+=x x f 2sin 的图象向左平移8π个单位,所得到的函数是偶函数,则ϕ的一个可能取值为( ) A .43π B .4πC .0D .4π-10.下列三个数:2323ln-=a ,ππ-=ln b ,33ln -=c ,大小顺序是( ) A .b c a << B .c b a >> C .c a b >> D .b c a >>11.若直线2-=kx y 与抛物线x y 82=交于A ,B 两个不同的点,且AB 的中点的横坐标为2,则=k ( )A.-1B.2C.2或-1D.1±512.定义在R 上的奇函数()x f 和定义在{}0|≠x x 上的偶函数()x g 分别满足()⎪⎩⎪⎨⎧≥<≤-=)1(1)10(12x x x x f x ,()()0log 2>=x x x g ,若存在实数a 使得()()b g a f =成立,则实数b 的取值范围是( )A .[]2,2-B .⎥⎦⎤⎝⎛⎪⎭⎫⎢⎣⎡-21,00,21 C .(][)+∞-∞-,22, D .⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡--2,2121,2第Ⅱ卷(非选择题,共90分)本卷包括必考题和选考题两部分.第13题~第21题为必考题,每个试题考生都必须做答.第22、23题为选考题,考生根据要求做答. 二、填空题:本大题共4小题,每小题5分.13.若x ,y 满足约束条件⎪⎩⎪⎨⎧≤+≥+≥32320y x y x x ,则y x z -=的最小值是 .14.若()51-ax 的展开式中3x 的系数是80,则实数a 的值是 .15.已知四棱锥ABCD P -的顶点都在半径为2的球面上,底面ABCD 是正方形,且底面经过球心O ,E 是AB 的中点,⊥PE 底面ABCD ,则该四棱锥ABCD P -的体积于 .16.在数列{}n a 中,已知7,221==a a ,2+n a 等于1+⋅n n a a ()+∈N n 的个位数,则=2015a .三、解答题:解答时写出文字说明,证明过程和演算步骤. 17.(本题满分12分)已知向量()x x cos ,22sin 3+=,()x cos 2,1=,设函数()x f ⋅= (1)求()x f 的最小正周期;(2)在△ABC 中,c b a ,,分别是角A ,B ,C 的对边,若3=a ,f (A )=4,求△ABC 的面积的最大值.18.(本题满分12分)如图,正方形ADEF 与梯形ABCD 所在的平面互相垂直,AD CD ⊥,CD AB //,4,2===CD AD AB ,M 为CE 的中点.(1)求证:BM ∥平面ADEF ;(2)求平面BEC 与平面ADEF 所成锐二面角的余弦值.19.(本题满分12分)某公司对员工进行身体素质综合测试,测试成绩分为优秀、良好、合格三个等级,测试结果如下表:(单位:人)按优秀、良好、合格三个等级分层,从中抽到50人,其中成绩为优秀的有30人. (1)求a 的值;(2)若用分层抽样的方法,在合格的员工中按男女抽取一个容量为5的样本,从中任选3人,记X 为抽取女员工的人数,求X 的分布列及数学期望.20.(本题满分12分)已知椭圆L :()012222>>=+b a b y a x 的一个焦点与抛物线y 2=8x 的焦点重合,点()2,2在L 上. (1)求L 的方程;(2)直线l 不过原点O 且不平行于坐标轴,l 与L 有两个交点A ,B ,线段AB 的中点为M ,证明:OM 的斜率与直线l 的斜率的乘积为定值.21.(本题满分12分)已知函数()R a xax x x f ∈+-=,21ln (1)当2=a 时,求曲线()x f y =在1=x 处的切线方程; (2)当1>x 时,()0<x f 恒成立,求a 的取值范围请考生在第22、23题中任选一题做答,如果多做,则按所做的第一题记分。
2019-2020学年度学校10月月考卷
…………○……学校:____…………○……2019-2020学年度???学校10月月考卷 试卷副标题 考试范围:xxx ;考试时间:100分钟;命题人:xxx 第I 卷(选择题) 一、单选题 1.已知集合A ={(x ||x |<2)},B ={−2,0,1,2},则A B ⋂=( )A.{0,1}B.{−1,0,1}C.{−2,0,1,2}D.{−1,0,1,2} 2.设3i 12i z -=+,则z = A .2 B C D .1 3.设f (x )为奇函数,且当x ≥0时,f (x )=e x −1,则当x <0时,f (x )= A.e −x −1 B.e −x +1 C.−e −x −1 D.−e −x +1 4.已知a =log 27,b =log 38,c =0.30.2,则a,b,c 的大小关系为 A.c <b <a B.a <b <c C.b <c <a D.c <a <b 5.曲线y =2sin x +cos x 在点(π,–1)处的切线方程为 A .10x y --π-= B .2210x y --π-= C .2210x y +-π+= D .10x y +-π+= 6.函数2sin 1x y x x =++ 的部分图象大致为( ) A . B . C . D . 7.已知a ∈(0,π2),2sin2α=cos2α+1,则sinα= A .15 B C . D……装…………○……_____姓名:___________班级:____……装…………○……8.△ABC 的内角A 、B 、C 的对边分别为a 、b 、c .已知sin sin (sin cos )0B A C C +-=,a =2,c ,则C = A.π12 B.π6 C.π4 D.π3 9.ABC ∆是边长为1的等边三角形,点,D E 分别是边,AB BC 的中点,连接DE 并延长到点F ,使得2DE EF =,则AF BC u u u r u u u r g 的值为( ) A.58- B.18 C.14 D.118 10.已知椭圆C :2221(0)4x y a a +=>的一个焦点为(20),,则C 的离心率为 A .13 B .12 C .2 D .3 11.某几何体的三视图如图所示(单位:cm ),则该几何体的体积(单位:3cm )是( ) A .2 B .4 C .6 D .8 12.已知函数e 0()ln 0x x f x x x ⎧≤=⎨>⎩,,,,()()g x f x x a =++.若g (x )存在2个零点,则a 的取值范围是 A .[–1,0) B .[0,+∞) C .[–1,+∞) D .[1,+∞) 第II 卷(非选择题)请点击修改第II 卷的文字说明 二、填空题 13.ABC △的内角,,A B C 的对边分别为,,a b c .若π6,2,3b a c B ===,则ABC △的面积为__________.…外…………○………学校:______…内…………○………15.设12F F ,为椭圆22:+13620x y C =的两个焦点,M 为C 上一点且在第一象限.若12MF F △为等腰三角形,则M 的坐标为___________. 16.已知0x >,0y >,且3x y xy +=,若23t t x y +<+恒成立,则实数t 的取值范围是________. 三、解答题17.在正项等比数列{}n a 中,11a =且32a ,5a ,43a 成等差数列 (1)求数列的通项公式; (2)若数列{}n b 满足n n n b a =,求数列{}n b 的前n 项和n S . 18.某工厂为了对新研发的一种产品进行合理定价,将该产品按事先拟定的价格进行试销,得到如下数据: (1)求回归直线方程ˆy =bx+a ,其中b=-20,a=ˆy -b x ; (2)预计在今后的销售中,销量与单价仍然服从(1)中的关系,且该产品的成本是4元/件,为使工厂获得最大利润,该产品的单价应定为多少元?(利润=销售收入-成本) 19.如图,在四棱锥中,平面,AB ∥DC,DC ⊥AC . (Ⅰ)求证:DC ⊥平面PAC ; (Ⅱ)求证:平面PAB ⊥平面PAC ; (Ⅲ)设点E 为AB 的中点,在棱PB 上是否存在点F ,使得ΡΑ//平面CΕF ?说明理由.…○…………线…………○……_____班级:__________…○…………线…………○……20.已知椭圆()过点(0,2),离心率. (Ⅰ)求椭圆的方程; (Ⅱ)设过定点(2,0)的直线与椭圆相交于两点,且为锐角(其中为坐标原点),求直线斜率的取值范围. 21.已知函数()3223f x x ax a x =+-+,a R ∈. (1)若0a <,求函数()f x 的单调减区间;(2)若关于x 的不等式()22ln 1x x f x a +'≤+恒成立,求实数a 的范围. 22.如图,在极坐标系Ox 中,(2,0)A ,)4B π,)4C 3π,(2,)D π,弧»AB ,»BC ,»CD 所在圆的圆心分别是(1,0),(1,)2π,(1,)π,曲线1M 是弧»AB ,曲线2M 是弧»BC ,曲线3M 是弧»CD . (1)分别写出1M ,2M ,3M 的极坐标方程; (2)曲线M 由1M ,2M ,3M 构成,若点P 在M 上,且||OP P 的极坐标. 23 设函数()211f x x x =++-. (1)画出()y f x =的图像; (2)当[)0x +∞∈,,()f x ax b ≤+,…○…………线…………○……____…○…………线…………○……求 a b 的最小值.参考答案1.A【解析】分析:先解含绝对值不等式得集合A ,再根据数轴求集合交集. 详解:222,x x Q ,<∴-<< 因此A I B ={}{}2,0,1,2(2,2)0,1-⋂-=,选A.点睛:认清元素的属性,解决集合问题时,认清集合中元素的属性(是点集、数集或其他情形)和化简集合是正确求解的两个先决条件.2.C【解析】【分析】先由复数的除法运算(分母实数化),求得z ,再求z .【详解】因为312i z i -=+,所以(3)(12)17(12)(12)55i i z i i i --==-+-,所以z ==C .【点睛】本题主要考查复数的乘法运算,复数模的计算.本题也可以运用复数模的运算性质直接求解.3.D【解析】【分析】先把x <0,转化为-x>0,代入可得f(−x),结合奇偶性可得f(x).【详解】∵f(x)是奇函数, x ≥0时,f(x)=e x −1.当x <0时,−x >0,f(x)=−f(−x)=−e −x +1,得f(x)=−e −x +1.故选D .【点睛】本题考查分段函数的奇偶性和解析式,渗透了数学抽象和数学运算素养.采取代换法,利用转化与化归的思想解题.4.A【分析】利用利用0,1,2等中间值区分各个数值的大小。
10月份月考答案
2019-2020学年度第一学期10月份考试八年级语文试卷说明: 1. 全卷共6页,满分为120分。
考试用时为120分钟。
2. 答卷前,考生务必用黑色字迹的签字笔或钢笔在答题卡填写自己的准考证号、姓名、考场号、座位号。
用2B铅笔把对应该号码的标号涂黑。
3. 答题必须用黑色字迹钢笔或签字笔作答,答案必须写在答题卡各题目的指定区域内相应位置上;如需改动,先划掉原来的答案,然后再写上新的答案;不准使用铅笔和涂改液。
不按以上要求作答的答案无效。
4. 本试卷设有附加题,共10分,考生可答可不答;该题得分作为补偿分计入总分,但全卷最后得分不得超过120分。
第一部分基础(24分)1.根据课文默写古诗文。
(10分)(1)东皋薄暮望,□□□□□。
(王绩《野望》)(1分)(2)妻子象禽兽,行止依林阻。
□□□□□,□□□□□。
(曹植《梁甫行》)(2分)(3)□□□□□,长河落日圆。
(王维《使至塞上》)(1分)(4)“□□□□□□□,□□□□□□□。
”由写虚幻的传说转为实写眼前的所见景物,描绘了一个空明、悠远的画面。
(崔颢《黄鹤楼》)(2分)(5)把李白《渡荆门送别》默写完整。
(4分)渡远荆门外,来从楚国游。
□□□□□,□□□□□。
□□□□□,□□□□□。
仍怜故乡水,万里送行舟。
2根据拼音写出相应的词语。
(4分)(1)法国的普吕多姆(文学奖),他在诗歌创作方面颇有jiàn shù( )。
(2)在两人时断时续、不急不缓的对话声中,舰、机配合得非常mò qì( ) (3)为了这一着,面对技术封锁,多少人dān jīng jié lǜ(),青丝变白发。
(4)1937年12月13日,侵华日军野蛮侵入南京,随后制造了cǎn jué rén huán ( )的南京大屠杀惨案.3. 下列句中加点成语使用不恰当的一项是( D )(3分)A.他因生理学方面的建树..而被授予诺贝尔奖。
高中数学 2019-2020学年度学校10月月考卷
绝密★启用前2019-2020学年度???学校10月月考卷试卷副标题考试范围:xxx ;考试时间:100分钟;命题人:xxx注意事项:1.答题前填写好自己的姓名、班级、考号等信息 2.请将答案正确填写在答题卡上第I 卷(选择题)请点击修改第I 卷的文字说明一、单选题1.已知R 为实数集,集合{|(,1)(1,0)(1,)}A x x =∈-∞-⋃-⋃+∞,{}1|(1)()02B x x x =+->,则集合()RC A B 为A .{1}[0,1]-B .1[0,]2C .1[1,]2- D .1{1}[0,]2-【答案】D 【解析】 【分析】先解一元二次不等式得集合B ,再根据集合并集以及补集概念求结果. 【详解】 由(,1)(1,0)(1,)A =-∞--+∞,1(,1)(,)2B =-∞-+∞,所以A B1(,1)(1,0)(,)2=-∞--+∞,所以 1(){1}[0,]2R C A B =-,故选D .【点睛】集合的基本运算的关注点(1)看元素组成.集合是由元素组成的,从研究集合中元素的构成入手是解决集合运算问题的前提.(2)有些集合是可以化简的,先化简再研究其关系并进行运算,可使问题简单明了,易于解决.(3)注意数形结合思想的应用,常用的数形结合形式有数轴、坐标系和Venn 图.2.已知复数()()211i a bi i -+=+(i 是虚数单位,,a b ∈R ),则a b +=( )A .2-B .-1C .0D .2试卷第2页,总13页○…………※※订※※线※※○…………【答案】A 【解析】分析:由题意首先求得等式右侧的复数,然后结合复数相等的充分必要条件整理计算即可求得最终结果.详解:由复数的运算法则可得:()()()()2121222111112i i i i i i i i i i ------====--+++-, 结合题意可得:1a bi i +=--,即:1,1a b =--=-, 据此可得:2a b +=-. 本题选择A 选项.点睛:本题主要考查复数的综合运算,复数相等的充分必要条件等知识,意在考查学生的转化能力和计算求解能力.3.将甲、乙两个篮球队5场比赛的得分数据整理成如图所示的茎叶图,由图可知以下结论正确的是( )A .甲队平均得分高于乙队的平均得分中乙B .甲队得分的中位数大于乙队得分的中位数C .甲队得分的方差大于乙队得分的方差D .甲乙两队得分的极差相等 【答案】C 【解析】 【分析】由茎叶图分别计算甲、乙的平均数,中位数,方差及极差可得答案. 【详解】26282931315x ++++==甲29;28293231305x ++++==乙30,∴x x 甲乙,<∴A错误;甲的中位数是29,乙的中位数是30,29<30,∴B 错误;甲的极差为31﹣26=5,乙的极差为32﹣28=4,54≠,∴D 错误; 排除可得C 选项正确, 故选C . 【点睛】本题考查了由茎叶图求数据的平均数,极差,中位数,运用了选择题的做法即排除法的解题技巧,属于基础题.4.已知各项均为正数的等比数列{}n a 的前n 项和为.n S 若12S ,3S ,2S 成等差数列,则数列{}n a 的公比为( ) A .13B .12C .2D .3【答案】B 【解析】 【分析】设等比数列的公比为(0)q q >,运用等差中项的性质和等比数列的通项公式,解方程即可得结果. 【详解】设各项均为正数的等比数列{}n a 的公比设为q , 因为12S ,3S ,2S 成等差数列, 所以可得31222S S S =+, 即为()211111122a a q a qa a a q ++=++,化为2210q q +-=, 解得12q =或1q =- (舍去),故选B . 【点睛】本题主要考查等比数列的通项公式和等差中项性质,考查方程思想,意在考查对基础知识的掌握与应用,属于基础题.5.执行如图所示的程序框图,输出S 的值为试卷第4页,总13页………………订…………○…………线…………○……线※※内※※答※※题※※………………订…………○…………线…………○……A .15B .16C .24D .25【答案】B 【解析】 【分析】执行循环,根据条件对应计算S ,直至5i =时结束循环,输出结果. 【详解】进入循环, 当1i =时, 15,i 为奇数,1S =;当2i =时,25,i 为偶数,1+23S ==;当3i =时,35,i 为奇数,3+58S ==;当4i =时,45,i 为偶数,8+816S ==;当5i =时,55≥,结束循环,输出16S =.故选B . 【点睛】算法与流程图的考查,侧重于对流程图循环结构的考查.先明晰算法及流程图的相关概念,包括选择结构、循环结构、伪代码,其次要重视循环起点条件、循环次数、循环终止条件,更要通过循环规律,明确流程图研究的数学问题,是求和还是求项. 6.已知直线20ax y +-=与圆()()2214x y a -+-=相交于两点,且线段AB 是圆C 的所有弦中最长的一条弦,则实数a = A .2 B .±1 C .1或2D .1………订…………○………__________考号:___________………订…………○………【答案】D 【解析】由题设可知直线20ax y +-=经过圆心(1,)C a ,所以2201a a -=⇐=,应选答案D 。
2019-2020学年高一英语10月份四校联考试题
2019-2020学年高一英语10月份四校联考试题本试卷分第Ⅰ卷和第Ⅱ卷,总分120分,考试时间120分钟。
注意:请将答案统一写在答题卡上,否则不得分Ⅰ卷第一部分听力(共两节,每题1分,满分20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 does the man advise the woman to wear?A. A suit.B. A uniform.C. A black dress.2. Where does the conversation probably take place?A. In a restaurant.B. In a hospital.C. In a shop.3. How many classes does the man have?A. Four.B. Three.C. Five4. What does the woman want the man to do?A. Take her bike away.B. Go out with her.C. Repair her bike.5. Who likes music that has great lyrics?A. The woman.B. The man.C. Both of them.第二节听下面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,你有时间阅读各个小题,每小题5秒钟;听完后,各小题给出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和第7两个小题。
6. Where does the woman want to go?A. The nearest hospital.B. The supermarket.C. The nearest subway station.7. How long does it take to go to the destination on foot?A. Ten minutes.B. Five minutes.C. Twenty minutes.听第7段材料,回答第8至9题。
2019-2020学年度上学期10月月考
2019-2020学年度上学期10月月考本试卷分第Ⅰ卷(选择题)和第Ⅱ卷 (非选择题) 两部分,共8页。
满分150分,考试时间100分钟。
第Ⅰ卷第一部分阅读理解(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,从每题所给四个选项中,选出最佳选项,并在答题卡上将该项涂黑。
AAssistant Professor, Musical Theatre DanceWichita State University seeks a full-time, 9-month assistant professor, beginning in August. Applicants ar e required to have a degree in dance area, teaching experien ce at a professional or college level, ability to direct and teach stage movement. The salary depends on qualifications and e xperience.For complete information visit .Full Professor in Theatre and DanceThe Department of Theatre & Dance at the University of Calif ornia at San Diego (http://www-) is seeking an experienced theatre artist in li ghting design. Applicants must work for us for at least one ye ar. Significant professional experience is required. This positio n is expected to teach at both graduate and undergraduate le vels.A review of applications will start on June 1st. Application dea dline: September 1st.Technical Director in Performing and Fine ArtsDeSales University’s Performing and Fine Arts Department seeks a highly skilled, professional technical director. The pos ition is a 10-month staff position with the possibility of summer employmen t with the Pennsylvania Shakespeare Festival. Professional e xperience is required; MFA is preferred.Please email materials to john.bell@. Screenin g of applications begins immediately and will continue until th e position is filled.Assistant Director— Media Resources CenterMaryland Institute College of Art is seeking an Assistant Dir ector of Media Resources Center in the Academic Affairs Divi sion.Qualifications for the position include a degree in Art History or related fields with knowledge of art and design history, lib rary experience, excellent interpersonal and communication s kills and familiarity with photoshop and scanning.A review of applications will begin immediately; job announ cements will remain open until the position is filled. Applicants are required to work for us at least 11 months. They can sen d emails to jobs@. The salary differs depending on y our experience. Please include your desired salary in your ap plication letter.1. If an applicant has 9.5-month free time, he or she can pay close attention to the ad of ______.A. Full Professor in Theatre and DanceB. Assistant Professor, Musical Theatre DanceC. Technical Director in Performing and Fine ArtsD. Assistant Director— Media Resources Center2. If you have excellent interpersonal and communication skill s, you can apply to _______.A. Wichita State UniversityB. the University of CaliforniaC. DeSales UniversityD. Maryland Institute College of Art3. According to the advertisements, we can learn that _______ .A. all the jobs mentioned in the text require experienceB. all the jobs mentioned above promise a good salaryC. all the reviews of applications will begin immediatelyD. all the job announcements will remain open until the posit ions are filledB. For Canaan Elementary’s second grade in Patchogue, N.Y.,today is speech day ,and right now it’s Chris Palaez’s turn. Th e 8-year-old is the joker of the class. With shining dark eyes, he seems like the of kid who would enjoy public speaking.But he’s,nervous.“I’m here to tell you today why you should …should…”Chris trips on the“-ld,”a. pronunciation difficulty for many non-native English speakers. His teacher ,Thomas Whaley ,is next to him, whispering support.“…Vote for …me…”Except for so me stumbles, Chris is doing amazingly well. When he brings h is speech to a nice conclusion ,Whaley invites the rest of the class to praise him.A son of immigrants, Chris stared learning English a little over three years ago. Whaley recalls(回想起)how at the beginning of the year,when called upon to read,Chris would excuse himself to go to the bathroom.Learning English as a second language can be a painful expe rience. What you need is a great teacher who lets you make mistakes. “It takes a lot for any student,” Whaley explains,“especially for a student who is learning English as their new l anguage,to feel confident enough to say,‘I don’t know,but I want to know.’”Whaley got the idea of this second-grade presidential campaign project when he asked the childr en one day to raise their hands if they thought they could nev er be a president. The answer broke his heart. Whaley says t he project is about more than just learning to read and speak i n public. He wants these kids to learn to boast(夸耀)about themselves.“Boasting about yourself,and your best qualities,” Whaley says,“is very difficult for a child who came into the classroom not fe eling confident.”4. What made Chris nervous?A. Telling a story.B. Making a speech.C. Taking a test.D. Answering a question.5. What does the underlined word “stumbles” in paragraph 2 r efer to?A. Improper pauses.B. Bad manners.C. Spelling mistakes.D. Silly jokes.6. We can infer that the purpose of Whaley’s project is to ____ _____.A. help students see their own strengthsB. assess students’ public speaking skillsC. prepare students for their future jobsD. inspire students’ love for politics7. Which of the following best describes Whaley as a teacher ?A. Humorous.B. Ambitious.C. Caring.D. Demanding.CMinutes after the last movie ended yesterday at the Plaza Th eater, employees were busy sweeping up popcorns and gath ering coke cups. It was a scene that had been repeated manytimes in the theater’s 75-year history. This time, however, the cleanup was a little differ ent. As one group of workers carried out the rubbish, another group began removing seats and other theater equipment in p reparation for the building’s end.The film classic The Last Picture Show was the last movie sh own in the old theater. Though the movie is 30 years old, mos t of the 250 seats were filled with teary-eyed audience wanting to say good-be to the old building. Theater owner Ed Bradford said he cho se the movie because it seemed appropriate. The movie is se t in a small town where the only movie theater is preparing to close down.Bradford said that large modern theaters in the city made it im possible for the Plaza to compete. He added that the theater’s location(位置) was also a reason. “This used to be the center of town, ” h e said. “Now the area is mostly office buildings and warehous es. ”Last week some city officials suggested the city might be inter ested in turning the old theater into a museum and public mee ting place. However, these plans were abandoned because offinancial problems. Bradford sold the building and land to a lo cal development firm, which plans to build a shopping comple x on the land where the theater is located.The theater audience said good-by as Bradford locked the doors for the last time. After 75 yea rs the Plaza Theater has shown its last movie. The theater will be missed.8. In what way was yesterday’s cleanup at the Plaza special?A. It made room for new equipment.B. It signaled the closedown of the theater.C. It was done with the help of the audience.D. It marked the 75th anniversary of the theater.9. Why was The Last Picture Show put on?A. It was an all-time classic. B. It was about the history of the town.C. The audience requested it.D. The theater owner f ound it suitable.10. What will probably happen to the building?A. It will be repaired.B. It will be turned into a m useum.C. It will be knocked down.D. It will be sold to the city government.11. What can we infer about the audience?A. They are disappointed with Bradford.B. They are sad to part with the old theater.C. They are supportive of the city officials.D. They are eager to have a shopping center.DAlice Moore is a teenager entrepreneur(创业者), who in May 2015 set up her business AilieCandy. By th e time she was 13,her company was worth millions of dollars with the invention o f a super-sweet treat that could save kids' teeth,instead of destroying them.It all began when Moore visited a bank with her dad. On the o uting, she was offered a candy bar. However, her dad remind ed her that sugary treats were bad for her teeth. But Moore w as sick of missing out on candies. So she desired to get round the warning, "Why can't I make a healthy candy that's good f or my teeth so that my parents can't say no to it?" With that in mind, Moore asked her dad if she could start her own candy c ompany. He recommended that she do some research and tal k to dentists about what a healthier candy would contain. With her dad's permission, she spent the next two years researching online and conducting trials to get a recipe that was b oth tasty and tooth-friendly. She also approached dentists to learn more about te eth cleaning. Consequently, she succeeded in making a kind of candy only using natural sweeteners, which can reduce ora l bacteria.Moore then used her savings to get her business of the groun d. Afterwards, she and her father secured their first business meeting with a supermarket owner, who finally agreed to sell Moore's product-Cancandy.As CanCandy's success grows, so does Moore's credibility as a young entrepreneur. Moore is enthusiastic about the candy she created, and she's also positive about what the future mig ht bring. She hopes that every kid can have a clean mouth an d a broad smile.Meanwhile, with her parents' help, Moore is generally able to l ive a normal teenage life. Although she founded her company early on in life, she wasn't driven primarily by profit. Moore w ants to use her unique talent to help others find their smiles. S he donates 10% of AilicCandy's profits to Big Smiles. With her talent and determination, it appears that the sky could be the limit for Alice Moore.12. How did Moore react to her dad's warning?A. She argued with him.B. She tried to find a way out.C. She paid no attention.D. She chose to consult dentists.13. What is special about CanCandy?A. It is beneficial to dental health.B. It is free of sweeteners.C. It is sweeter than other candies.D. It is produced to a dentists' recipe.14. What does Moore expect from her business?A. To earn more money.B. To help others find smiles.C. To make herself stand out.D. To beat other candy companies.15. What can we learn from Alice Moore's story?A. Fame is a great thirst of the young.B.A youth is to be regarded with respect.C. Positive thinking and action result in success.D. Success means getting personal desires satisfied第二节:(共5小题,每题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,选项中有两项为多余选项。
2019-2020学年高一英语10月份四校联考试题_1
2019-2020学年高一英语10月份四校联考试题本试卷分为第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,第Ⅰ卷第1页至第7页,第Ⅱ卷第8页至第9页。
试卷满分120分。
考试时间100分钟。
第Ⅰ卷选择题(共70分)第一部分:听力(共两节,满分20分)第一节(共5小题;每小题1分,满分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,你将有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. Who is going to the hospital this afternoon?A. Tom’s sister.B. Betty’s sister.C. Betty.2. What can we learn from the conversation?A. All the taxis are black in London.B. The woman has been to London twice.C. It’s the first time that the man has been in London.3. What’s the possible relationship between the two speakers ?A. Neighbors.B. Shopkeeper and customer.C. Close friends.4. Why does the woman want to go back to the hotel?A. She wants to go to bed early.B. She is going to meet somebody.C. She will have a meeting.5.What is the woman looking for?A. A hotel.B. A bank.C. A museum.第二节(共10小题;每小题1.5分,满分15分)听下面几段材料。
2019-2020学年九年级语文上册十月份月考试卷.pdf
2019-2020学年度九年级语文上册十月份月考试卷(原卷版)(时量150分钟,总分150分)班级姓名学号计分一、语言文字积累与运用(共29分)(一)单项选择题(共12分,每小题3分)1、下列加点字注音全部正确的一项是( )A、妖娆(ráo)嘶哑(sī)藩篱(pān)惟妙惟肖(xiào)B、诘责(jié)锃亮(zèng)稽首(qǐ)颔首低眉(hàn)C、投箸(zhù)佝偻(lóu)恣睢(zī)拈轻怕重(niān)D、阔绰(chuò)荫庇(yìn)恻隐(chè)吹毛求疵(cī)2.下列词语书写有误的一项()A、天骄飘逸冠冕忧戚B、轻灵沉醉聘婷漫游C、珍羞婵娟垂钓夕贬潮州D、黎明戍鼓腐烂红装素裹3.台风是怎样生成的?要说明这个,先得说明为什么会有风。
,突然一流动,那就是风了。
①空气到达地面之后,再向稀薄的地方冲过去。
②冷的空气体积收缩,变得稠密,密度增大,就是通常说的变“重”了,因而就下沉。
③热的空气体积膨胀,变得稀薄,密度减小,就是通常说的变“轻”了,因而就上升。
④风就是贴近地面的流动的空气。
A. ④②③①B. ④③②①C. ②③①④D. ③②①④4.下列句子没有语病的一项是()A.能否最大限度地调动老师的工作热情,关键在于校领导的勤政廉洁和管理智慧。
B.经过持续不断的环保治理、重拳出击,让我们的山变得更青了,水变得更绿了。
C.精准扶贫不但要给予物质和经济上的帮助,而且要给予方法和技能上的指导。
D.丁细牙痛胶囊的主要成分是由丁香叶、细辛组成的,因此毒副作用比较小。
(二)按原文默写(共8分,每空1分)5.(1),引无数英雄竞折腰。
(2)汉文有道恩犹薄,。
(3),枳花明驿墙。
(4)知汝远来应有意,。
(5)《行路难》(其一)中,比喻人生路上的艰难和仕途的阻塞的句子:,。
(6)《酬乐天扬州初逢席上见赠》中,形象揭示新陈代谢的自然规律并表现诗人积极进取进取的人生态度的句子:,。
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绝密★启用前2019-2020学年度???学校10月月考卷试卷副标题注意事项:1.答题前填写好自己的姓名、班级、考号等信息 2.请将答案正确填写在答题卡上第I 卷(选择题)请点击修改第I 卷的文字说明 一、单项选择1.—I guess you want to go play tennis.—__________. That’s exactly what I was thinking too. A .I didn’t get it B .It’s up to you C .You never knowD .You read my mind2.I __________ to send Peter a gift to congratulate him on his marriage , but I couldn’t manage it.A .had hopedB .am hopingC .have hopedD .would hope3.A study shows the students who are engaged in after-school activities are happier than _________who are not. A .ones B .those C .theseD .them4.________ to think critically is an important skill today’s children will need for the future. A .Learn B .Learned C .LearningD .Having learned5.________ all the problems, several of the players produced excellent performances. A .According to B .Instead of C .In addition toD .In spite of6.—My son got a full scholarship to his dream university!试卷第2页,总13页—Wow, ________! What’s he going to study? A .good for him B .go for it C .what a coincidenceD .all the best7.We can observe that artificial intelligence has already made a(n) ________ on our lives in many ways. A .statement B .impact C .impressionD .judgment8.Amy, as well as her brothers, ________ a warm welcome when returning to the village last week. A .is given B .are given C .was givenD .were given9.Kate heard a man’s voice in the background, but she couldn’t ________ what he was saying. A .set aside B .take back C .make outD .keep off10.Most colleges now offer first-year students a course specially ________ to help them succeed academically and personally. A .designed B .designing C .to designD .being designed11.Their child is at the stage ________ she can say individual words but not full sentences. A.why B.where C.whichD.what12.The professor warned the students that on no account ________ use mobile phones in his class.A .should theyB .they shouldC .dare theyD .they dare13.Tom is so independent that he never asks his parents’ opinion ________ he wants their support. A .since B .once C .unlessD .after14.The workers were not better organized, otherwise they ________ the task in half the time. A.accomplished B.had accomplished C.would accomplishD.would have accomplished15.A dog’s eating habit require s regular training before it is ________ established. A .properly B .widely C .originally D .temporarily二、完形填空I was ready to pay for my bananas at the grocery one night , when fear seized me. My wallet was gone. I could only have left it on the G9 bus , which was now speeding in the dark to some 16 station.The 17 moment was quickly followed by mental math. How much time and money would it cost to replace the 18 of that little wallet ? The credit cards , the driver’s license , the cash , all lost to the bus.Two hours later , back at my house , I heard a knock on the door. My husband 19 it while I was on the phone in the dining room. “Does Jennifer live here ?” I heard a lady say. In my husband’s hand was my wallet , with not a penny 20 . She left before I could 21 make it to the door to offer my thanks.After sharing the story online , I heard from someone , who 22 the lady as Erin Smith. Without 23 , I called to thank her. She said she 24 my wallet on a bus seat. She 25 that going to a stranger’s house was a 26 move , but she decided to take the chance. “If I were in that 27 , I would want someone to try to find me ,” she said.This one stranger responded beautifully to my small 28 , but s he actually wasn’t the only one. Right after Erin 29 my wallet on the bus , she posted a picture of my driver’s license to an online forum (论坛), trying to see 30 anyone knew me. No sooner did she leave my doorstep than I had emails from two women whose kids go to my son’s nursery and who recognized my face. I’ve never 31 words with those moms beyond small talk, but they wanted to help. I read that people are more divided than ever , but that’s not how the people I 32 tend to act.33 , I feel blessed someone had wanted to help a stranger. Erin had gone 34 what almost anyone would have done , finding my house on a bitterly cold night , and for that I was extremely 35 . 16.A .accessibleB .hiddenC .unknownD .convenient试卷第4页,总13页17.A .face-saving B .brain-washing C .eye-catching D .heart-stopping 18.A .parts B .contents C .details D .ingredients 19.A .ignored B .answered C .examined D .interrupted 20.A .missing B .returned C .remaining D .abandoned 21.A .still B .ever C .yet D .even 22.A .selected B .appointed C .identified D .defined 23.A .delay B .alarm C .regret D .invitation 24.A .moved B .placed C .opened D .spotted 25.A .disagreed B .complained C .calculated D .recommended 26.A .selfless B .risky C .slow D .personal 27.A .site B .direction C .situation D .atmosphere 28.A .crisis B .danger C .threat D .failure 29.A .got rid of B .made use ofC .had control ofD .took possessionof 30.A .if B .where C .how D .when 31.A .recalled B .exchanged C .repeated D .whispered 32.A .encounter B .follow C .consult D .accompany 33.A .Going away B .Turning around C .Looking back D .Coming along 34.A .into B .against C .over D .beyond 35.A .longing B .enthusiasticC .concernedD .grateful三、阅读理解History Fair CompetitionUnderstanding history is vital to understanding ourselves as a people and as a nation. History is much more than the study of dusty old objects and events long past. It is an essential part of who we are today and who we will become. Thornton Middle School History Fair Competition makes understanding history exciting , engaging , and fun ! This Year’s ThemeAll participants must address how communication or transportation technology has promoted the quality of life for Americans throughout history. To many people , technologymeans computers, hand-held devices, or vehicles that travel to distant planets. However, technology is also the application of scientific knowledge to solve a problem, touching lives in countless ways.Individuals or groups may enter one of the following categories:·Performance·Documentary(纪实作品)·Essay WritingCategory RequirementsPerformance: A dramatic presentation of the topic no more than 10 minutes long. If special clothes are used, they should truly represent a given period.Documentary: A visual presentation(such as a video, slide show, or computer project)no more than 10 minutes long. A desktop computer, screen, projector, and loudspeakers will be available. Students must provide their presentations on CDs before Friday, March 23.Essay Writing: An academic paper of 2,000 to 2,500 words. No illustrations(图解) are allowed. Please do not include covers. A list of references must be included.Important DatesJanuary 5 Submit a topic proposal to your history teacher. The teacher may require a second proposal if the first is off-topic or unclear.February 5 Submit a first draft of your essay, performance script(剧本), or documentary highlights.February 19 A committee of teachers will evaluate materials and give opinions. Students then have an opportunity to improve their products.March 9 Submit a final draft of your essay.March 15 Performance and documentary committee previewMarch 24 Thornton Middle School History Fair Competition7:00A.M.—9:00 A.M Participants signing in at the gym10:00A.M.—6:00 P. M. Competit ion and judges’ review7:00P.M. Awards ceremony and picnic36.According to Paragraph 1, what is the major goal of understanding history?A.To preserve national traditions.B.To prepare for a history competition.C.To better know the present and future.试卷第6页,总13页D .To further explore historical mysteries. 37.What is the theme of this year’s competition ? A .Technology advances science. B .Science interacts with technology. C .Science has made the study of history easy. D .Technology has improved the life of Americans.38.Among the items provided by the school for a visual presentation are ________. A .special clothes and a screen B .a desktop computer and a CD C .a projector and special clothes D .a desktop computer and loudspeakers39.What would a participant have to do with an essay of 1,500 words to meet the category requirement?A .Include more information in the essay.B .Remove the references.C .Provide a cover for the essay.D .Explain the details with illustrations.40.What will the committee of teachers do on February 19? A .Preview performances and documentaries. B .Make comments on the materials. C .Improve the participant’s first draft.D .Collect a second proposal from the participant.I must have always known reading was very important because the first memories I have as a child deal with books. There was not one night that I don’t remember mom reading me a storybook by my bedside. I was extremely inspired by the elegant way the words sounded.I always wanted to know what my mom was reading. Hearing mom say, “I can’t believe what’s printed in the newspaper this morning,” made me want to grab it out of her hands and read it myself. I wanted to be like my mom and know all of the things she knew. So I carried around a book, and each night, just to be like her, I would pretend to be reading.This is how everyone learned to read. We would start off with sentences, then paragraphs, and then stories. It seemed an unending journey, but even as a six-year-old girl I realized thatknowing how to read could open many doors. When mom said, “The C-A-N-D-Y is hidden on the top shelf,” I knew where the candy was. My progress in reading raised my curiosity, and I wanted to know everything. I often found myself telling my mom to drive more slowly, so that I could read all of the road signs we passed.Most of my reading through primary, middle and high school was factual reading. I read for knowledge, and to make A’s on my tests. Occasionally, I would read a novel that was assigned, but I didn’t enjoy this type of r eading. I liked facts, things that are concrete. I thought anything abstract left too much room for argument.Yet, now that I’m growing and the world I once knew as being so simple is becoming more complex, I find myself needing a way to escape. By opening a novel, I can leave behind my burdens and enter into a wonderful and mysterious world where I am now a new character. In these worlds I can become anyone. I don’t have to write down what happened or what technique the author was using when he or she wrote this. I just read to relax.We’re taught to read because it’s necessary for much of human understanding. Reading is a vital part of my life. Reading satisfies my desire to keep learning. And I’ve found that the possibilities that lie within books are limitless.41.Why did the author want to grab the newspaper out of mom’s hands?A.She wanted mom to read the news to her.B.She was anxious to know what had happened.C.She couldn’t wait to tear the newspaper apart.D.She couldn’t help but stop mom from reading.42.According to Paragraph 3, the author’s reading of road signs indicates ________. A.her unique way to locate herselfB.her eagerness to develop her reading abilityC.her effort to remind mom to obey traffic rulesD.her growing desire to know the world around her43.What was the author’s view on factual reading?A.It would help her update test-taking skills.B.It would allow much room for free thinking.C.It would provide true and objective information.D.It would help shape a realistic and serious attitude to life.44.The author takes novel reading as a way to ________.试卷第8页,总13页A .explore a fantasy landB .develop a passion for learningC .learn about the adult communityD .get away from a confusing world45.What could be the best title for the passage ? A .The Magic of Reading B .The Pleasure of Reading C .Growing Up with Reading D .Reading Makes a Full ManHow does an ecosystem (生态系统) work ? What makes the populations of different species the way they are ? Why are there so many flies and so few wolves ? To find an answer , scientists have built mathematical models of food webs , noting who eats whom and how much each one eats.With such models , scientists have found out some key principles operating in food webs. Most food webs , for instance , consist of many weak links rather than a few strong ones. When a predator (掠食动物) always eats huge numbers of a single prey (猎物), the two species are strongly linked; when a predator lives on various species , they are weakly linked. Food webs may be dominated by many weak links because that arrangement is more stable over the long term. If a predator can eat several species , it can survive the extinction (灭绝) of one of them. And if a predator can move on to another species that is easier to find when a prey species becomes rare , the switch allows the original prey to recover. The weak links may thus keep species from driving one another to extinction.Mathematical models have also revealed that food webs may be unstable , where small changes of top predators can lead to big effects throughout entire ecosystems. In the 1960s , scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species —including species they did not directly attack.And unplanned human activities have proved the idea of top-down control by top predators to be true. In the ocean , we fished for top predators such as cod on an industrial scale , while on land , we killed off large predators such as wolves. These actions have greatly affected the ecological balance.Scientists have built an early-warning system based on mathematical models. Ideally , thesystem would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key, scientists say, because once ecosystems pass their tipping point(临界点), it is remarkably difficult for them to return.46.What have scientists discovered with the help of mathematical models of food webs? A.The living habits of species in food webs.B.The rules governing food webs of the ecosystems.C.The approaches to studying the species in the ecosystems.D.The differences between weak and strong links in food webs.47.A strong link is found between two species when a predator ________.A.has a wide food choiceB.can easily find new preyC.sticks to one prey speciesD.can quickly move to another place48.What will happen if the populations of top predators in a food web greatly decline? A.The prey species they directly attack will die out.B.The species they indirectly attack will turn into top predators.C.The living environment of other species will remain unchanged.D.The populations of other species will experience unexpected changes.49.What conclusion can be drawn from the examples in Paragraph 4?A.Uncontrolled human activities greatly upset ecosystems.B.Rapid economic development threatens animal habitats.C.Species of commercial value dominate other species.D.Industrial activities help keep food webs stable.50.How does an early-warning system help us maintain the ecological balance?A.By getting illegal practices under control.B.By stopping us from killing large predators.C.By bringing the broken-down ecosystems back to normal.D.By signaling the urgent need for taking preventive action.Would you BET on the future of this man? He is 53 years old. Most of his adult lifehas been a losing struggle against debt and misfortune. A war injury has made his left hand stop试卷第10页,总13页functioning , and he has often been in prison. Driven by heaven-knows-what motives , he determines to write a book.The book turns out to be one that has appealed to the world for more than 350 years. That former prisoner was Cervantes , and the book was Don Quixote (《堂吉诃德》). And the story poses an interesting question: why do some people discover new vitality and creativity to the end of their days , while others go to seed long before ?We’ve all known people who run out of steam before they reach life’s halfway mark. I’m not talking about those who fail to get to the top. We can’t all get there. I’m talking about people who have stopped learning on growing because they have adopted the fixed attitudes and opinions that all too often come with passing years.Most of us , in fact , progressively narrow the variety of our lives. We succeed in our field of specialization and then become trapped in it. Nothing surprises us. We lose our sense of wonder. But , if we are willing to learn, the opportunities are everywhere.The things we learn in maturity seldom involve information and skills. We learn to bear with the things we can’t change. We learn to avoid self -pity. We learn that however much we try to please , some people are never going to love us —an idea that troubles at first but is eventually relaxing.With high motivation and enthusiasm , we can keep on learning. Then we will know how important it is to have meaning in our life. However , we can achieve meaning only if we have made a commitment to something larger than our own little egos (自我), whether to loved ones , to fellow humans , to work , or to some moral concept.Many of us equate (视……等同于) “commitment” with such “caring” occupations as teaching and nursing. But doing any ordinary job as well as one can is in itself an admirable commitment. People who work toward such excellence —whether they are driving a truck , or running a store —make the world better just by being the kind of people they are. They’ve learned life’s most valuable lesson.51.The passage starts with the story of Cervantes to show that ________. A .loss of freedom stimulates one’s creativity B .age is not a barrier to achieving one’s goal C .misery inspires a man to fight against his fate D .disability cannot stop a man’s pursuit of success52.What does the underlined part in Paragraph 3 probably mean ?A.End one’s struggle for liberty.B.Waste one’s energy taking risks.C.Miss the opportunity to succeed.D.Lose the interest to continue learning.53.What could be inferred from Paragraph 4?A.Those who dare to try often get themselves trapped. B.Those who tend to think back can hardly go ahead. C.Opportunity favors those with a curious mind. D.Opportunity awaits those with a cautious mind.54.What does the author intend to tell us in Paragraph 5?A.A tough man can tolerate suffering.B.A wise man can live without self-pity.C.A man should try to satisfy people around him.D.A man should learn suitable ways to deal with life. 55.What is the author’s purpose in writing the passage?A.To provide guidance on leading a meaningful adult life. B.To stress the need of shouldering responsibilities at work. C.To state the importance of generating motivation for learning.D.To suggest a way of pursuing excellence in our lifelong career.第II卷(非选择题)请点击修改第II卷的文字说明四、阅读表达阅读短文,按照题目要求用英语回答问题。