模拟试卷-2
中医内科学期末模拟试卷(卷2)
中医内科学试题及答案1、患者,女,68岁。
3日前外感风寒后,自觉身体沉重而疼痛,甚则肢体浮肿,恶寒,无汗,伴咳喘,痰多白沫,胸闷,干呕,口不渴,苔白,脉弦紧。
宜选用的方剂是A.小青龙汤B.柴枳半夏汤C.香附旋覆花汤D.甘遂半夏汤E.己椒苈黄丸【答案】A2、患者突然昏仆,不省人事,半身不遂,牙关紧闭,面白唇暗,静卧不烦,四肢不温,痰涎壅盛,舌苔白腻,脉沉滑缓,可诊为A.厥证B.痉证C.中风D.口僻E.痿证【答案】C3、患者迷惑善忘,兴趣缺失,反应迟钝,善惊易恐,食少纳呆,四肢不温,夜尿频多。
舌淡胖大有齿痕,舌苔白脉沉弱,两尺尤甚。
应用A.还少丹B.天麻钩藤饮C.苓桂术甘汤D.半夏白术天麻汤E.归脾汤【答案】A4、称阳痿为“阴痿”的医书是A.《灵枢·经筋》B.《素问·痿论》C.《景岳全书》D.《诸病源候论》E.《灵枢·邪气脏腑病形》【答案】E5、中风的表现A.缓慢起病B.突发半身不遂C.口舌歪斜D.言语謇涩E.神志昏蒙【答案】B C D E6、肺痈的成痈期的治疗原则是A.清热解毒,清肺消痈B.清肺消痈,祛痰化瘀C.清热解毒,化瘀消痈D.活血化瘀,清肺消痈E.益气养阴,清肺解毒【答案】C7、以下属于瘿病的基本病机的是A.气滞B.寒凝C.痰凝D.血瘀E.湿阻【答案】A C D8、水肿的治疗,《内经》提出“开鬼门”一法,是属于八法中的A.吐法B.补法C.汗法D.消法E.和法【答案】C9、内伤头痛与哪些脏腑有关A.心B.肝C.脾D.肺E.肾【答案】B C D10、癃闭最基本的病机是A.肺热壅盛,不能通调水道B.肝气失于疏泄,膀胱气化不利C.膀胱气化失调D.脾肾阳气虚弱,膀胱气化无权E.浊瘀阻塞,水道不通【答案】C11、刘某,男,46岁,工人。
因汗出受风诱发腰痛月余就诊。
自述腰痛重着,转侧不能,热敷后症状可以减轻,阴雨天加重。
伴有畏寒肢冷,双下肢冷凉尤甚,舌苔白腻,脉沉而缓。
该病例为何种类型腰痛A.寒湿腰痛B.湿热腰痛C.肾虚腰痛D.瘀血腰痛E.痛痹【答案】A12、下列属于癫症的临床表现是A.神情抑郁B.表情淡漠C.语无伦次D.沉默呆钝E.静而少动【答案】A B C D E13、下列哪位医家提出戾气致病的病因学说A.吴又可B.薛雪C.吴鞠通D.王孟英E.叶天士【答案】A14、石韦散可用于A.气淋B.血淋C.劳淋D.膏淋E.以上均不可用【答案】E15、痰火扰神所致狂证的治法是A.调畅气血B.滋阴降火C.镇心涤痰D.清肝泻火E.安神定志【答案】C D16、患者,男,36岁。
2024年辽宁省沈阳市初中学业水平考试模拟试卷英语试题(二)(含答案)
2024年辽宁省初中学业水平考试(模拟卷二)英语试卷(本试卷共45道题满分90分考试时间90分钟)考生注意:所有试题必须在答题卡指定区域内作答,在本试卷上作答无效第一部分选择题(共50分)一、阅读理解(共20小题,每小题2分,满分40分)第一节阅读下面语言材料,从每题所给的A、B、C、D 四个选项中选出最佳选项。
A1.Chen begins his work at .A.6:3 p.m.B.7:00 p.m.C.7:00 a.m.D.7:30 a.m.2.It's about 11:50 a.m.now.Chen may be .A.resting at homeB.having lunch outsideC.collecting rubbishD.on his way to Changping3.Chen visits the rubbish recycling station a day.A.onceB.twiceC.three timesD.four times 4.The text is about Chen'sA.interestB.jobC.total incomeD.daily timetableBChina showed its power at the ISU Short Track Speed Skating (短道速滑)World Cup in Montreal,Canada,which took place from October 20 to 22.China won its first gold medal of the season in the mixed 2,000 meters relay (接力赛)on October 21,with the great performance of Gong Li, Zang Yize, LiuShaolin and Liu Shaoang. Liu Shaoang also won the men's 500m final (决赛)on October 22.If you watch the competition,you will be amazed by the rocket-like start of the skaters. It needs the skaters to use great explosive power (爆发力).Short track speed skating is all about speed.As they race around the track,top skaters can reach a speed of 50 km an hour.They shift (转移)their weight between their legs and reach out their hands to keep up speed.Skaters are allowed to overtake (超过)others at any point during the race,but corner overtaking is the best way.Short track speed skating came about in Canada in the 1880s,but has grown popular in Asia since the 1990s. According to Xinhua,China,South Korea and Canada are the top performers at the World Short Track Speed Skating Championships.Team China is getting ready for the Milano Cortina 2026 Winter Olympics.“The new season at ISU is a chance to train both new and experienced players for the coming games,” Zhang Jing ,the coach of the national team,told Xinhua.5. What does the underlined word“It” refer to?A.The score.B.Racing around the track.C.The rocket-like start.D.Watching the competition.6. Which picture can best describe the way of keeping up speed when skating?B.7.(新考法·跨学科试题)Short track speed skating has been popular in Asia for aboutA.20 yearsB.30 yearsC.40 yearsD.140 yearsD.C.8.W hat can be the best title for the text?A.Flying on iceB.Fighting for2026C.The history of skatingD.Showing power at the ISUCFrom the moon to Mars,scientists have been looking for water—the key tolife—in the solar system for decades.Recently,they have turned to Jupiter(木星)!On April 14, the European Space Agency's(ESA) JUICE spacecraftsuccessfully lifted off from French Guiana in South America.JUICE,short for“Jupiter Icy Moons Explorer”,will collect data from Jupiter and its three moons,Europa,Ganymede and Callisto.The three moons are believed to have big oceans of liquid water(液态水) under their icy shells (壳) .According to ESA,the water on these moons could be six times as much as the amount in Earth's oceans. The mission( 任务) “will change our understanding of the solar system”,wrote Scientific American.In 1998,NASA's Galileo spacecraft found that Europa might be ejecting(喷射)water as far as 160 kilometers into space.That gave scientists the idea of studying the icy moons of Jupiter.The oceans under these moons are likely to be tens of kilometers deep.But they are also trapped under tens of kilometers of ice,making it very difficult to study them.Although JUICE cannot land on the surface,it has lots of high-tech equipment to study the moon's environment,including spectral imaging(光谱成像)tools and radar(雷达) .“They could give more data on things like the thickness of the oceans,their salt content(含量),and their distance from the icy shells above,”reported Phys. org.“The main goal is to understand whether there are habitable(适合居住的) environments among those icy moons and around a giant planet like Jupiter,”JUICE team member Olivier Witasse said during a press conference(发布会)on April 6.9.JUICE has been sent to look for _on Jupiter.A.airB.sandC.goldD.water10.Paragraph 4mainly wants to tell usA.how far water can be ejectedB.why scientists wanted to study JupiterC.what NASA's Galileo spacecraft foundD.which spacecraft was used to explore the universe11.The underlined word"trapped"in Paragraph 5 has the closest meaning to" ”.A.lockedB.createdC.collectedD.taken12.The purpose of the task is to find out if .A.there are living things out thereB.life can live on some of Jupiter's moonsC.there are lakes in the universeD.we can move water from Earth to the moons of JupiterDThe hot pot has a long history of about 2,000 years.The hot pot used to be preferred in winter, but recently it has been appearing on tables all year round.Apart from(除了……外)its delicious taste,there are two other important reasons for the Chinese to like the hot pot.The first one is that the hot pot is considered a great way to make new friends. People gather around the pot,chatting,eating,drinking and having fun.The other is that the hot pot is a healthy meal.Eating the hot pot can warm the body and improve circulation(血液循环)in winter, and increase perspiration(出汗)to help cool the body in summer.There are several kinds of hot pots in China with different soup.Two of the most popular hot pots are Sichuan hot pot and Beijing mutton hot pot.Sichuan hot pot is famous for its numbing and spicy(又麻又辣的)taste,due to the addition of a special food material—Sichuan pepper—and other spicy things like chilli,which makes it different from other hot pots.Beijing mutton hot pot is regarded as the typical northern China hot pot.Mutton is its main part,and the soup is made from lamb bones.When you eat a hot pot in a restaurant,generally,there are two kinds of soup bases:spicy and clear.A clear soup base has quite a mild(温和的)taste,which is made from seafood or meat bones.A spicy soup base usually has Sichuan pepper,which is spicy and salty.If you have a mixed group with some who don't eat spicy food,there is a special pot with a divider in the middle between the spicy and clear soup,which is called a double-flavor hot pot(鸳鸯锅).13.The hot pot is popular because①it tastes delicious②it is cheap and easy to make③it is a way to make friends④it is a healthy mealA. ①②③B. ②③④C.①③④D.①②④14.Paragraph 4mainly talks aboutA.the typical northern China hot potsB.the introduction of two hot potsC.the taste of Sichuan hot potD.the food material of Sichuan hot pot15.In Paragraph 6, the writer advises the mixed group toA.give up eating any hot potB.choose a clear soup baseC.enjoy Beijing mutton hot potD.try a double-flavor hot pot16.Match the different kinds of the hot pots with the characters(特点)according tothe passage,①Sichuan hot pot ②Beijing mutton hot pot ③double-flavor hot pota.a typical northern China hot potb.the numbing and spicy tastec.the clear soup and the spicy soup are both includedA.①—b;②—a;③—cB.①—a;②—b;③—cC.①—c;②—a;③—bD.①—b;②—c;③—a第二节阅读短文,从方框内所给的选项中选出可以填入空白处的最佳选项,其中有一个多余的选项。
认证通用基础模拟试卷带参考答案-2
【单选题】1. 合格评定功能法中进行确定活动之一,其核心技术是()。
A. 评价技术B. 查阅方法C.面谈技巧D.观察能力参考答案:A题目解析:《审核概论》P143评价活动是合格评定功能法中的关键活动之一,而评价技术是审核的核心技术。
【单选题】2.WTO/TBT协议规定了各成员国合格评定的原则的目的是为了()。
A.增加各成员国的贸易壁垒B.提升合格评定活动对贸易的影响C.减少合格评定活动对贸易的负面影响D.提高合格评定活动的约束性参考答案:C题目解析:《合格评定基础》P9三、合格评定的原则为减少合格评定活动对贸易的负面影响,WTO/TBT协议规定了各成员国合格评定的原则。
【单选题】3.审核通常可包括:审核活动启动、审核活动的准备、审核活动的实施、审核报告的编制、审核的完成等活动,()不属于审核阶段活动内容。
A.审核发现的汇总分析B.审核的后续活动C.审核过程和结果的复核D.审核方案的监视和评审参考答案:B题目解析:《审核概论》P68审核通常可划分为审核的启动、审核活动的准备、审核活动的实施、审核报告的编制与分发、审核的完成、审核后续活动的实施等六个阶段。
审核后续活动是在审核完成之后进行的活动,不属于审核阶段的内容。
【单选题】4.关于检验机构的内部管理要求描述错误的是()。
A.管理方式B是按照GB/T 19001要求建立并保持管理体系B.检验机构管理方式A至少包括文件控制、记录控制、管理评审、内部审核、纠正措施、预防措施C.检验机构必须按照GB/T 19000要求建立并保持管理体系D.检验机构应建立并保持能持续满足管理方式A或者管理方式B要求之一的管理体系参考答案:C题目解析:《合格评定基础》P182:(二)检验机构管理方式B:一个检验机构已经按照GB/T 19001要求建立并保持管理体系,且有能力支持并证实其满足本准则的要求,则符合管理体系条款的要求。
P180:检验机构管理体系方式A应包括:管理体系文件、文件控制、记录控制、管理评审、内部审核、纠正措施、预防措施。
2023年浙江省杭州市中考数学模拟试卷-(2)
2023年浙江杭州中考数学模拟卷一、选择题:本大题有10个小题,每小题3分,共30分.在每小题给出的四个选项中,只有一个选项是符合题目要求的.1.在下列四个实数中,最大的数是( )A .-1B .12C .0D 2.上网搜索“淄博烧烤”,网页显示找到相关结果约31600000个.数据31600000用科学记数法表示为( ) A .73.16 B .3.16×106 C .3.16×107 D .31.6×1063.某城市几条道路的位置如图所示,道路CD 与道路EF 平行,道路AB 与道路CD 的夹角()CDB ∠为50︒,城市规划部门想修一条新道路BF ,要求F B ∠=∠,则F ∠的大小为( )A .40︒B .35︒C .30︒D .25︒4.已知实数a b c ≤≤,则( )A .2a c b +≤B .3a b c +≤C .2a b c +≥D .b a c ≤+5.如图,在平行四边形ABCD 中,BD =BC ,∠ABC =110°,点E 在BC 上,∠BDE =16°,则∠DEC 的度数是( )A .54°B .56°C .76°D .124°6.如图,把一块三角板ABC 的直角顶点B 放在直线EF 上,30C ∠=︒,//AC EF ,则1(∠= )A .30︒B .45︒C .60︒D .75︒7.我国古代数学名著《九章算术》中记载:“粟米之法:粟率五十;粝米三十.今有米在十斗桶中,不知其数.满中添粟而春之,得米七斗.问故米几何?”意思为:50斗谷子能出30斗米,即出米率为35.今有米在容量为10斗的桶中,但不知道数量是多少.再向桶中加满谷子,再舂成米,共得米7斗.问原来有米多少斗?如果设原来有米x 斗,向桶中加谷子y 斗,那么可列方程组为( )8.如图是战机在空中展示的轴对称队形.以飞机B ,C 所在直线为x 轴、队形的对称轴为y 轴,建立平面直角坐标系.若飞机E 的坐标为(40,)a ,则飞机D 的坐标为( )A .(40,)a -B .(40,)a -C .(40,)a --D .(,40)a -9.已知二次函数2(y x ax b a =++,b 为常数).命题①:该函数的图象经过点(1,0);命题②:该函数的图象经过点(3,0);命题③:该函数的图象与x 轴的交点位于y 轴的两侧;命题④:该函数的图象的对称轴为直线1x =.如果这四个命题中只有一个命题是假命题,则这个假命题是( )A .命题①B .命题②C .命题③D .命题④10.如图,在△ABC 中,∠ABC =90°,AB =BC ,点D 为AB 中点,BF ⊥CD 于点E ,交AC 于点F ,若AB =2,则AF =( )A .4B .3CD .1二、填空题:本大题有6个小题,每小题4分,共24分.11 ______.16.二次函数()210y ax bx c a =++≠,()220y mx nx q m =++≠,若函数1y 的图象的顶点在函数2y 的图象上,函数2y 的图象的顶点在函数1y 的图象上,且0an bm -≠,则a 与m 所满足的关系式为______.三、解答题:本大题有7个小题,共66分.解答应写出文字说明、证明过程或演算步骤.17.(本小题满分6分)以下是小明化简整式()32x x y -+的解答过程:解 ()32x x y -+32x x y =-+1y =+小明的解答过程是否有错误?如果有错误,请写出正确的解答过程.18.(8分)某工厂生产某种产品,3月份的产量为5000件,4月份的产量为10000件.用简单随机抽样的方法分别抽取这两个月生产的该产品若干件进行检测,并将检测结果分别绘制成如图所示的扇形统计图和频数直方图(每组不含前一个边界值,含后一个边界值)已知检测综合得分大于70分的产品为合格产品. (1)求4月份生产的该产品抽样检测的合格率;(2)在3月份和4月份生产的产品中,估计哪个月的不合格件数最多?为什么?19.(8分)如图,在△ABC 中,AC <AB <BC .(1)已知线段AB 的垂直平分线与BC 边交于点P ,连接AP ,求证:∠APC =2∠B .(2)以点B 为圆心,线段AB 的长为半径画弧,与BC 边交于点Q ,连接AQ .若∠AQC =3∠B ,求∠B 的度数.20.(本题满分10分) 设函数11k y x=,函数22y k x b =+(1k ,2k ,b 是常数,10k ≠,20k ≠). (1)若函数1y 和函数2y 的图象交于点()1,A m ,点B (3,1),①求函数1y ,2y 的表达式:②当23x <<时,比较1y 与2y 的大小(直接写出结果).(2)若点()2,C n 在函数1y 的图象上,点C 先向下平移2个单位,再向左平移4个单位,得点D ,点D 恰好落在函数1y 的图象上,求n 的值.21.(10分)如图,已知正方形ABCD 的边长为1,正方形CEFG 的面积为S 1,点E 在DC 边上,点G 在BC 的延长线上,设以线段AD 和DE 为邻边的矩形的面积为S 2,且S 1=S 2.(1)求线段CE 的长;(2)若点H 为BC 边的中点,连接HD ,求证:HD =HG .22.(本题满分12分)设二次函数212y x bx c =++(b ,c 是常数)的图象与x 轴交于A ,B 两点.(1)若A ,B 两点的坐标分别为(1,0),(2,0),求函数1y 的表达式及其图象的对称轴.(2)若函数1y 的表达式可以写成()2122y x h =--(h 是常数)的形式,求b c +的最小值.(3)设一次函数2y x m =-(m 是常数).若函数1y 的表达式还可以写成()()122y x m x m =---的形式,当函数12y y y =-的图象经过点()0,0x 时,求0x m -的值.23.(本小题满分12分) 如图1,AB 为⊙O 的直径,CD ⊥AB 于点E ,»»CFCB =,BF 与CD 交于点G . (1)求证:CD =BF .(2)若BE =1,BF =4,求GE 的长.(3)连结GO ,OF ,如图2,求证:12902EOG AOF ∠+∠=︒.。
贵州省2023年初中学业水平考试(模拟试卷二)
贵州省2023年初中学业水平考试(模拟试卷二)数学同学你好!答题前请认真阅读以下内容:1.全卷共6页,三大题共25题,满分150分,考试时间为120分钟.考试形式为闭卷.2.一律在答题卡相应位置作答,在试题卷上答题视为无效.3.不能使用计算器.一、选择题:以下每题均有A 、B 、C 、D 四个选项,其中只有一个选项正确,请用2B 铅笔在答题卡相应位置作答,每题3分,共36分.1.计算(-5)+5的结果是(A )0(B )-10(C )-25(D )-12.下列数学符号中,是轴对称图形的是(A )∥(B )⊥(C )≌(D )∽3.2023数博会于5月26日在贵阳盛大启幕,以“数实相融算启未来”为主题开展相关活动,活动布展规模达60000平方米.60000这个数用科学记数法可表示为(A )60×102(B )6×104(C )6×105(D )0.6×1054.如图,用一个平面分别去截下列水平放置的几何体,所截得的截面不可能是三角形的是5.若二次根式2x 有意义,则实数x 的值可能是(A )-2(B )0(C )1(D )36.如图,在平面内过点A 作直线m ∥l ,可作平行线的条数有(A )0条(B )1条(C )0条或1条(D )无数条7.已知a >3,下列不等式中,不一定正确的是(A )a -3>0(B )a +1>4(C )2a >6(D )am >3m 8.某市招聘教师,规定将笔试和面试成绩按照4∶6计算总分并择优录取.王星本次参加测试的笔试成绩是85分,面试成绩是90分,则王星最后得分为(A )85分(B )87.5分(C )88分(D )90分(A )(B )(C )(D )(第6题)(第11题)(第9题)图①图②9.将四根长度相等的细木条首尾相接,用钉子钉成四边形ABCD ,转动这个四边形,使它形状改变.当∠B =90°时,如图①,测得AC =2;当∠B =60°时,如图②,AC 的长为(A)2(B )2(C )6(D )2210.关于x 的一元二次方程(m -5)x 2+2x +2=0有实根,则m 能取到的最大整数值是(A )2(B )3(C )4(D )511.《九章算术》中记载了一种测量古井水面以上部分深度的方法.如图,在井口P 处立一根垂直于井口的木杆AP ,视线AC 与井口的直径PB 交于点D ,如果测得AP =2米,BP =3.6米,DP =1米,则BC 为(A )3.6米(B )4.2米(C )5.2米(D )7.8米12.二次函数()220y ax ax c a =-+≠的图象过点(3,0),那么方程的解为(A )1321-=-=x x ,(B )1321=-=x x ,(C )1321-==x x ,(D )1321==x x ,二、填空题:每题4分,共16分.13.已知两个变量x 与y 满足112=-y x ,当自变量6=x 时,因变量y 的值是▲.14.转动如图所示的转盘,当转盘停止时,指针落在白色区域的概率是▲.15.关于x 的分式方程22-+x m x =3的解是正数,则m 的取值范围为▲.16.如图,点A (1,0),点B (4,0),点C 从原点出发,沿y 轴正半轴移动,连接AC ,将线段AC 绕点A 顺时针旋转60°得到线段AD ,连接BD ,当线段BD 取最小值时,点C 的坐标为▲.(第14题)(第16题)220-+=ax ax c三、解答题:本大题共9题,共计98分.解答应写出必要的文字说明、证明过程或演算步骤.17.(本题满分12分)(1)如图,数轴上A ,B 两点所表示的数分别是a ,b ,则a ▲0,b ▲0,a -b ▲0;((填“<”或“>”)(2)先化简(m +2)(m -2)-m 2+m ,再从(1)中的数轴上A ,B 之间任取一个你喜欢的整数作为m 的值,代入化简的结果并求值.18.(本题满分10分)伴随网络化发展,网络销售的确给生活带来便利.小红对网上一家电子产品店在今年14-月的电子产品销售总额情况进行数据收集并整理如图①,其中一款平板电脑的销售额占当月电子产品销售总额的百分比如图②.(1)这家电子产品店从1月到4月,电子产品销售总额为多少万元?(2)直接写出这家电子产品店从1月到4月,电子产品每月销售总额的中位数▲;(3)小红通过图②得出结论,这款平板电脑24-月的销售额占当月电子产品销售总额的百分比与1月份相比都下降了;小星通过图②得出结论,这款平板电脑4月份的销售额比3月份有所下降.请判断,小红和小星得出的结论是否正确?若不正确,请说明理由.(第17题)(第18题)图①图②(第19题)如图,AE ,AD 分别是△ABC 的边BC 上的中线和高,已知BE =8.(1)BC =▲,∠DAC +∠C =▲°;(2)若AD =5,AE =AC ,求△ADE 的面积.20.(本题满分10分)“双减”政策颁布后,各校重视了延时服务,并在延时服务中加大了体育活动的力度.某体育用品商店抓住商机,计划购进乒乓球拍和羽毛球拍共300套进行销售,它们的进价和售价如下表:已知购进2套乒乓球拍和1套羽毛球拍需花费120元;购进4套乒乓球拍和3套羽毛球拍需花费270元.(1)求出表格中a ,b 的值;(2)该体育用品商店根据以往销售经验,决定购进乒乓球拍套数不少于羽毛球拍套数的13,若这批体育用品能够全部售完,如何购货才能获利最大?最大利润是多少?21.(本题满分10分)如图,在平面直角坐标系中,点A 坐标为(0,3),过点A 作y 轴的垂线交反比例函数(0)k y k x=>的图象于点B ,连接OB ,△AOB 的面积为6.(1)求反比例函数的表达式;(2)若点C 为x 轴正半轴上一点,请用无刻度的直尺和圆规作出∠BOC 的平分线,与反比例函数的图象交于点D ,并求出点D 的坐标(要求:不写作法,保留作图痕迹).进价售价乒乓球拍(元/套)a 55羽毛球拍(元/套)b 50(第21题)构建几何图形是利用“数形结合”的思想解决代数问题.学习特殊角的三角函数值时,老师让同学们准备一副三角板如图①,利用直角三角形的边角关系直接探究即可得出结论.(1)填写表格中的特殊角的三角函数值;(2)【问题解决】学习特殊角的三角函数值后,老师布置的课后作业是计算tan22.5°的值.【构建图形】如图②,在Rt △ABC 中,∠C =90°,∠ABC =45°,延长CB 到点D ,使BD =AB ,连接AD ,得∠D =22.5°,所以tan22.5°=112211(1)(212)2-===-++-AC CD .【类比探究】计算tan15°的值.(要求,构建图形并写出计算过程)23.(本题满分12分)如图,△ABC 内接于⊙O ,过点B 作⊙O 的切线,交直径DA 的延长线于点E .(1)若∠ACB =26°,则∠BAD =▲°;(2)求证:∠ABE =∠ACB ;(3)若AE =2cm ,BE =4cm ,求⊙O 的半径.(第23题)(第22题图①)(第22题图②)24.(本题满分12分)如图①,抛物线l :c bx x y ++=2与x 轴相交于点A ,B (3,0)两点,且与y 轴相交于点C (0,-3).(1)求抛物线的表达式和顶点坐标;(2)如图②,若抛物线l 沿着直线y =-x 平移,使其顶点落在坐标轴上,直接写出平移后抛物线的表达式;(3)当(2)中平移后的抛物线顶点落在y 轴上时,在x 轴上是否存在一点P (不与原点重合),过点P 作x 轴的垂线分别交平移前后的抛物线于点E ,F ,交直线y =-x 于点G ,使得PF =EG ,若存在,求出点P 的坐标,若不存在,请说明理由.25.(本题满分12分)【问题解决】(1)如图①,正方形ABCD 的对线相交于点O ,过点O 作OE ⊥OF ,分别交AB ,BC 边于点E ,F .在实验与探究中,小红发现通过证明△BOE ≌△COF ,可得OE =OF .请帮助小红完成证明过程;【类比探究】(2)如图②,在矩形ABCD 中,O 为对线BD 上任意一点,过点O 作OF ⊥OA ,交BC 边于点F ,当BC =2AB 时,求证:OA =2OF ;【拓展提升】(3)如图③,在□ABCD 中,O 为对线BD 上任意一点,过点O 作∠AOF =∠BAD .交BC 边于点F ,求证:BC AB OA OF =.图①图②(第24题)图①图②图③(第25题)。
2024年浙江省杭州市中考英语模拟试卷(二)(含详细答案解析)
2024年浙江省杭州市中考英语模拟试卷(二)一、完形填空:本大题共15小题,共15分。
Nervously,but for courage,I held the rope of my guide dog Coco a bit tighter when we passed by my neighbour's yard.Walking by Mr.Smith's (1)______ was the best part of our morning walk.And also the (2)______ .The sweet smell of the beautiful roses in Mr.Smith's yard was absolutely the best.The worst,came from Mr.Smith,an ice-cold man."Hello,Mr.Smith."I greeted him as usual,and hedidn't (3)______, as usual.But I knew (4)______ was there,at the door.I could hear him take a few steps back.Without eyesight(视力),my (5)______ were like my"eyes" and even better than them sometimes.I heard him (6)______ the door quickly and everything went silent.I wondered (7)______ Mr.Smith always ignored(忽视) me."Why (8)______ two people who both like roses be friends?" The question circled in my mind for long.Maybe because I'm blind(盲的)?Disabled people sometimes do make people (9)______ .They are different from common people and some even look strange.But I heard him playing chess with Jimmy who's in a wheelchair. Maybe local people dislike foreigners But he and my brother Joe get on well.Maybe because I'm a girl?( 10)______ when my friend Helen greets him,he says hello to her warmly.So Mr.Smith likes Jimmy,Joe and Helen,but not me and Coco!Wait!I (11)______ seemed to understand the reason he didn't talk to me.I just needed to prove(证实) it.I tied Coco to a tree,felt my way and moved slowly.Without Coco leading the way,I was not sure about each step.I heard his gate open."Jenny!Be (12)______ !"Mr.Smith shouted worriedly and the next second,he took me by the arm."Mr.Smith,I didn't think you liked me.Now I guess I've (13)______ the secret—you are afraid of Coco?"I asked him in a low voice."Yeah,Jenny.You know,your Coco is such a...big dog." Mr.Smith laughed,feeling embarrassed(尴尬的)( 14)______ a child being caught."Your fear of Coco may be big,but our (15)______ is BIGGER!I'll help e..."1.A. yard B. study C. kitchen D. bedroom2.A. best B. worst C. easiest D. hardest3.A. move B. notice C. reply D. escape4.A. I B. it C. he D. she5.A. eyes B. ears C. hands D. feet6.A. open B. shut C. repair D. answer7.A. how B. why C. when D. where8.A. can't B. mustn't C. needn't D. won't9.A. excited B. lucky C. angry D. afraid10.A. So B. And C. But D. Because11.A. certainly B. suddenly C. recently D. naturally12.A. honest B. polite C. confident D. careful13.A. paid for B. found out C. made up D. suffered from14.A. like B. for C. except D. with15.A. dream B. happiness C. friendship D. surprise二、补全对话-填空:本大题共1小题,共10分。
中考英语模拟试卷(二)
中考英语模拟试卷(二)Ⅰ. 单项选择。
1. —Excuse me, sir. Which is your cup? —_______small one. A. A B. The C. An D. /2. —Is this your bicycle, David? —No, it’s not . It’s Helen’s.A. hisB. yoursC. mineD. hers3. —________ do you help the old man with the housework? —Once a week.A. How soonB. How longC. How oftenD. How many4. —It _____ the Chinese people eight years to build the Three Gorges Dam(三峡大坝).—So great! A. spent B. cost C. paid D. took5. —Must I hand in my exercise book now, Mr Zhao?—No, you . You may give it to me tomorrow.A. needn’tB. mustn’tC. can’tD. may not6. Liu Xiang and Yao Ming are world-famous sports stars. _____ of them are the pride of China.A. AllB. NeitherC. BothD. None7. —I think it's________ to teach a man fishing than to give him fish.—I agree with you. A. more B. good C. better D. best8. The dress fits me well, I don’t want to buy it because it’s too expensive.A. soB. andC. orD. but9. It is said that potato chips ______ by mistake about a hundred years ago.A. inventB. inventedC. are inventedD. were invented10. —Would you like to go swimming with me this afternoon?—, but I have a lot of homework to do.A. I’d love toB. Yes, let’s goC. No, I won’tD. It doesn’t matter11. —Excuse me, could you tell me __________? —Sorry, I’m new here, too.A. where is the nearest bankB. how far is it to the bankC. how I can get to the bankD. is there a bank near here12. — Jack bought a new mobile phone the other day.—________? That’s his third one in just one month.A. Had heB. Did heC. Does heD. Has he13. It is reported that the floods have left about _________ people homeless.A. two thousandB. two-thousandsC. two thousandsD. two thousands of14. Of the seven days in the a week, Saturday is said to be the most popular ______ for a wedding (婚礼)in some countries. A. way B. situation C. event D. choice15. Would you please ______ this form for me to see if I’ve filled it in right?A. take offB. look afterC. give upD. go over16. Chan’s restaurant on Baker Street, ______ used to be poorly run, is now a successful business.A. thatB. whichC. whoD. where17. Professor James will give us a lecture on the Western culture, but when and where ______ yet.A. hasn’t been decidedB. haven’t decidedC. isn’t being decidedD. aren’t decided18. The play had already been on for quite some time when we ______ at the New Theatre.A. have arrivedB. arrivedC. had arrivedD. arrive19. The open-air celebration(庆祝)has been put off _______ the bad weather.A. thanks forB. becauseC. instead ofD. because of20. There _________ two football matches tomorrow evening.A.will haveB.will beC.is going to haveD. will areⅡ.完形填空。
流行病学试题--模拟试题1-
《流行病学》模拟试卷(二)一、名词解释(共20分,每题4分)1、双盲2、发病密度3、传染源4、暴露因子5、OR二、选择题(共40分,每题2分)1、流行病学研究的对象是:A 病人B 非病人C 人群D 个体E 病员携带者2、为制定某地区人群原发性高血压的社会综合防治方案,拟对该地区某时点人群原发性高血压的患病情况进行调查。
这类研究是:A 流行病学实验B 队列研究C 现况研究D 病例对照研究E 以上都不是3、病例对照研究中,下列哪组病例最佳?A 死亡病例B 现患病例C 新发病例D 死亡病例和现患病例E 死亡病例和新发病例4、在一项队列研究中,计算出某研究因素与肺癌的RR值的95%可信区间为0.2-0.8,那么该研究因素可能为肺癌的:A 危险因素B 保护因素C 混杂因素D 无关因素E 以上均不是5、某医院进行新药随机化临床试验,甲医生负责给药组的200例对象,乙医生负责检查对照组的200例对象,结果给药组有效率为80%,对照组有效率为40%,卡方检验差别显著,表明该新药有效。
此结论:A 结论正确,两组特征可能不同B 不正确,未计算95%可信限C 不正确,两组特征可能不同D 不正确,观察者之间存在偏倚E 不正确,选择的统计方法不合理6、病例对照研究中,最常见的偏倚为:A 选择性偏倚B 回忆偏倚C 信息偏倚D 混杂偏倚E 以上均不对7、如果A病的特异危险度大于B病的特异危险度,那么可以认为:A 暴露于A病的联系比之于B病的联系,更可能是因果关系B 去除暴露因素后,减少A病病例数将会多于减少的B病病例数C 患A病者暴露的概率大于患B病者D A病的相对危险度大于B病的相对危险度E 上述都是8、在病例对照研究中,匹配过头会造成:A 对研究结果无影响B 高估暴露因素的作用C 低估暴露因素的作用D 降低研究效率E 提高研究效率9、某厂20-40岁组工人500名,某年内2人死于肺癌,已知该年全人口20-40岁组肺癌的死亡率为1/1000,则SMR为:A 2.5B 2.0C 4.0D 5.0E 10.010、下列哪项试验不属于流行病学实验研究:A 治疗实验B 观察实验C 预防性实验D 干预实验E 社区实验11、疫源地的消灭必须满足:A 传染源被移走或消除了排菌状态B 传染源散播在外界中的病原体被彻底清除C 所有易感的接触者经该病的最长潜伏期观察,未出现新病例或感染D A+B+C12、人群疾病的自然史研究,可见于下列哪项研究?A 队列研究B 实验研究C 现况研究D 病例对照研究E 准实验研究13、为了探讨某病在不同国家人群中发病率差异是环境因素还是遗传因素所致,常用:A 描述流行病学方法B 遗传流行病学方法C 移民流行病学方法D 血清流行病学方法E 营养流行病学方法14、在1:1配对的病例对照研究中,(1)病例与对照均吸烟的有14对(2)病例与对照均不吸烟的有8对(3)病例组吸烟而对照组不吸烟的有24对(4)病例组不吸烟而对照组吸烟的有12对则吸烟所致该病的估计相对危险度为:A 2B 1.5C 1.17D 0.5E 0.3915、下列哪项工作不能通过研究疾病的分布来实现?A 确定疾病或死亡的原因B 阐明疾病或死亡分布的特征C 识别疾病或死亡的高危人群D 确定最需要照顾的医疗保健对象E 制定当前的卫生工作策略16、下列哪一项不属于队列研究的特点?A 该方法能研究一种因素与多种疾病的关系B 该方法能研究多种因素与一种疾病的关系C 该方法是因到果的研究D 该方法能计算研究因素所致的发病率E 该方法受回忆偏倚的影响较少17、在随机化临床实验中,采用随机分组的方法,是为了:A 使实验组与对照组人数相等B 使研究对象不清楚自己属于实验组或对照组C 使研究结果的判断不受研究者的主观影响D 保证实验对象的代表性,使研究结果更可靠E 使非研究因素在实验组与对照组保持平衡18、某病同某因素间的联系强度最好由以下哪一项确定?A 总人群中该病的发病率B 相对危险度C 归因危险度D 暴露于某因素的频率E 人群归因危险度百分比19、联合筛检中的系列试验可以提高:A 敏感度B 假阳性率C 特异度D 特异度和敏感度E 特异度、敏感度和假阳性率20、为了开展一项膳食与冠心病关系的病例对照研究,下述哪一项不应作为配比选择对照的条件?A 年龄B 经济文化地位C 居住地区D 职业E 性别三、简答题(共20分)1、请画出病因研究中的三角模式和轮状模式,并作简要说明。
2023年初中学业水平考试物理模拟试卷(二)(云南新中考)(解析版)
保密★启用前2023年初中学业水平考试模拟试卷(二)物理(全卷五个大题,共23个小题,满分90分,考试用时75分钟)(本试卷题型与分值设置依据2023年云南学业水平考试物理试卷最新信息预设)注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
2.回答第Ⅰ卷时,选出每小题答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其他答案标号。
写在本试卷上无效。
3.回答第Ⅰ卷时,将答案写在答题卡上。
写在本试卷上无效。
4.考试结束后,将本试卷和答题卡一并交回。
第Ⅰ卷(选择题)一、选择题(共10小题,满分30分。
1-7题为单选题,8-10题为多选题,全部选对得3分,选对但不全得1分,选错项得0分)1.为了加强管理,某单位利用人工智能技术,实行“刷脸”考勤制度。
如图所示,下列有关说法正确的是()A.“刷脸”时,面部经摄像头成倒立放大的实像B.“刷脸”时,面部应位于摄像头两倍焦距之外C.摄像头成像特点与投影仪相同D.“刷脸”时,面部经摄像头成倒立缩小的虚像【答案】B【详解】刷脸时,面部位于摄像头镜头的两倍焦距以外,成倒立缩小的实像,生活中的照相机就是根据这个原理制成的,故ACD错误,B正确。
故选B。
2.2022年6月17日,中国人民解放军海军福建舰(简称福建舰)下水。
福建舰配置电磁弹射和阻拦装置。
电磁弹射是指以电磁力为加速手段,当电磁弹射的弹射车轨道与航母舰载飞机前轮接触,并处于强磁场中,弹射车内的导体通过强电流时,即可受到强大的推力,将航母舰载飞机弹出。
如图所示,下列装置图能反映电磁弹射原理的是()A.B.C.D.【答案】C【详解】由题意可知,电磁弹射器的弹射车与飞机前轮连接,并处于强磁场中,当弹射车内的导体通以强电流时,即可受到强大的推力,由此可知其原理是通电导体在磁场中受力而运动;A.图中是奥斯特实验,说明了电流周围存在磁场,与电磁弹射器工作原理不一致,故A 不符合题意;B.图中实验探究的是电磁铁的磁性与线圈匝数的关系,匝数越多,磁性越强,与电磁弹射器工作原理不一致,故B不符合题意;C.图中有电源,通电导体棒在磁场中受力而运动,即与电磁弹射器工作原理相同,故C 符合题意;D.图中没有电源,是闭合电路的部分导体在磁场中做切割磁感线运动,产生感应电流,是电磁感应现象,与电磁弹射器工作原理不一致,故D不符合题意。
2023届上海市上海中学高三模拟卷练习二英语试卷(含答案)
高考英语上海卷模拟试卷(二)考生注意:1.考试时间120分钟,试卷满分140分。
2.本考试设试卷和答题纸两部分。
第I卷(共90分)I. Listening Comprehension (25 分)Section A (每题1分,共10分)Directions: In Section A, you will hear ten short conversations between two speakers. At the end of each conversation, a question will be asked about what was said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard.II. Grammar and Vocabulary (每题1 分,共20 分)Section ADirections: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, used one word that best fits each blank.An implant that can cool nerves to block pain signals has been unveiled by researchers who say the device could offer an alternative to drugssuch as opioids (类鸦片活性肽).The team behind the device say it could bring benefits for management of acute pain such as (21)_______ experienced after amputations (截肢)or nerve grafts."We are optimistic that this represents a very promising starting point for an engineering approach (22)_______ treating pain,” said Prof John Rogers of Northwestern University in the US, a co-author of the research. But he cautioned that it might be some time (23) _______ they were available to patients. "As with any implantable device, the regulatory process can be slow, typically (24) _______ (involve) much more extensive animal model studies over a period of years," he said.Writing in the journal Science, the team report that the device to block pain signals, which (25) _______(test) only on rats so far, involves a pump, external control system and an implant made from a soft, rubbery substance. The latter forms a sealed collection of tiny channels which form a twisting path in the part of the implant that sits around the target nerve like a cuff.When liquid coolant and dry nitrogen flow through the implant, the liquid causes a drop in temperature. An electronic sensor in the device allows the temperature at the nerve (26) _______(keep) constant."All body processes are based on metabolic chemical reactions, motions of ions and flows of fluids--all (27) _______slow down as a result ofcooling,” said Rogers. “ The net effect when cooling is applied to a nerve is in blocking of electrical signals."Among their experiments, the team tracked two rats with an injury, recording over a three- week period the minimum force that (28)_______be applied to the hind paw to cause the animal to retract (缩回)it. This data was then compared against three rats who were similarly injured but also had the implant. The results suggest bouts of cooling of the injured nerve from 37℃ to 10℃led to (29) _______(severe) pain, with a sevenfold increase in the force that could be applied to the paw. The team say the implant’s benefits include (30)_______, in contrast to opioids, it is not addictive. As the implant is made with water-soluble and biocompatible materials, it can break down in the body after use. The implant could be inserted as an extension of the patient’s initial surgery.Section BDirections: Complete the following passage by using the -words in the box. Each word can only be used once. Note that there is one more word than you need.A. attachedB. bottle-fedC. confusionD. invisibleE. originallyF. orphanedG. partneringH. procedureI. reproducedJ. subjectsK. unintentionallySaving Baby BearsReacting to the auditory assault of barking dogs, shouts and rifle blasts, a 168-pound American black bear shot out and hightailed (迅速逃走)it into the woods off a logging road.His sister, weighing in at 135 pounds, took a little more time to overcome her fear and (31) _______ before she, too, ran for the trees and away from the humans who had driven more than 100 miles to witness the bears’ return to the wild.The cubs were the 106th and 107th (32) _______ or injured bears to be raised or treated at the Progressive Animal Welfare Society (PAWS) Wildlife Center in Washington state, then released months later in the same general area where they were (33) _______found. Fitted with GPS collars and tattooed with identification numbers on their gums, the bears are also among the latest (34) _______of a long-term research study being conducted by Rich Beausoleil and Lindsay Welfelt, both biologists and bear and cougar specialists.The siblings were only two weeks old when a forest worker and his dog (35) _______ disturbed their den in February 2020, scaring away their mother. She never returned.The worker contacted the WDFW, an agency (36) _______with PAWS to rehabilitate sick, injured wild animals before releasing them back into their natural habitats."Their eyes and ears weren't open, and their teeth hadn't evenerupted,Jennifer Convy, PAWS senior director of wildlife, said of the cubs, which each weighed less than 2 pounds when they arrived and were the youngest ever to be raised at the center.Though (37) _______at first, the cubs weren't cuddled. Instead, their caregivers wore bear- scented bear suits during feedings once the cubs' eyes had opened. At PAWS, the staff and volunteers take pains to be (38)_______to all the animals in their care."They don't see us, ever. We don't talk to them. We don't name the animals because we don't want our staff or volunteers to get (39)_______,“ Convy said. After more than a year, the bear siblings were released.The wildlife biologists are studying how the bears raised at PAWS fare after their release, compared to their wild-reared brethren. One cub released in 2017 had her first litter of cubs in January."We've been to her den several times." Beausoleil said. "She (40)_______ and had cubs of her own ... This was kind of a turning point for us."After all, the whole point of PAWS' rehabilitation "is to protect and perpetuate (使持续) the species," he said.III. Reading Comprehension (45 分)Section A (每题1分,共15分)Directions: For each blank in the following passage there are four wordsor phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.The Other da Vinci CodeFor centuries, two of the most intriguing questions about Leonardo da Vinci's "Mon a Lisa" were "Who " and "When ”A(n) (41) _______made at Heidelberg University in 2005 pretty much answered both. A note written in a manuscript in the library (42) _______the account of da Vinci's first biographer, Giorgio Vasari: that the sitter was a merchanfs wife, Lisa Gherardini. The note also helped date the masterpiece to between 1503 and 1506.A(n) (43)_______ mystery-"Where "- is still in dispute. But on June 3rd a French engineer, Pascal Cotte, declared that he and a collaborator had (44) _______the landscape in the background of the painting. Arguments had (45)_______ been made for stretches of countryside in the Marche region and between Milan and Genoa. During a presentation in Vinci, near Florence, Mr Cotte maintained that the artist was more plausibly depicting a part of his native Tuscany 一one that keenly interested him at the time. According to this theory, da Vinci represented the area not as it was, but as, in an unrealised scheme, he (46) _______ it to be.Mr Cotte, who was asked by the Louvre (where the "Mona Lisa" hangs) to create a digital image of the painting, is the inventor of themultispectral camera: a device that can detect not only the drawing below the (47) _______of an oil painting, but also, where they exist, intermediate layers of work. It was among these, under what appears to be a pointed rock, that he found a(n) (48) _______sketch showing that da Vinci meant it to represent a castellated tower.The landscape of the "Mona Lisa" also includes a huge overhanging cliff. That is (49)_______ to one that da Vinci included in a sketch of a fortress (堡垒)contested by Pisa and Florence in the war that flared between them in 1503 (around the time he was painting Gherardini). The (50)_______ with the nearby cliff ——and a tower, known as the Caprona tower 一all overlook the river Amo as it snakes from Florence to Pisa. All three also feature in drawings made by da Vinci to illustrate a plan about which, says Mr Cotte, he became “(51) _______”.This involved diverting the Amo to (52) _______Pisa's water supply and give Florence an outlet to the Mediterranean. In the early 1500s, with the two citystates at war, the idea was under active consideration. Mr Cotte argues that a(n) (53) _______ winding through desolate countryside at the right of the "Mona Lisa" is too wide to be a road, as some have speculated, and is(54) _______the driedup bed of the Amo as da Vinci envisaged (设想)it once his plan had been adopted.It never was. But if Mr Cotte's theory is right, it might just explain why Gherardini, a Florentine, exhibits such a contented, if mysterious, (55)_______。
2023广东中考化学模拟试卷(二)
C.相对原子质量为30.97 g
D.磷原子的核外电子数是15
13.如图是a、b、c三种固体物质的溶解度曲线,下列说法正确的是
( B )
A.t1℃时,将5 g a加入20 g水中充分搅拌,可得到25 g a的饱和溶液
B.t2℃时将M点的a溶液转变为N点的a溶液,可采用加水的方法
C.将t1℃时c的饱和溶液升温到t2℃,其溶质质量分数不变
20.(10分)中国芯彰显中国“智”造,芯片的基材主要是高纯硅。如
图是一种制备高纯硅的工艺流程图。(已知: MgO +2HCl ==
MgCl2+H2O,常温下,MgCl2溶液呈中性 )
(1)操作Ⅰ的名称是
过滤
。
2Mg+SiO2
Si+2MgO
(2)反应Ⅰ中发生反应的化学方程式为_____________________,
若要用H装置收集一瓶二氧化碳气体,则气体应该从
填“a”或“b”)端进入。
a
(选
(4)氨气极易溶于水,实验室用生石灰和浓氨水可制取氨气,反
D
应较快,最适宜选用
(填字母编号)作为反应的发生装
置,并应用注射器 缓慢地 (选填“缓慢地”或“快速地”)加入浓
氨水药品,制得的氨气 不能 (选填“能”或“不能”)用装置G
。
(2)利用图中A、E装置的组合可以制取某种气体,实验室制取该
K2MnO4 + MnO2 + O2↑。
气体的化学方程式为 2KMnO4
(3)实验室可用C装置来制取二氧化碳,在多孔隔板上放的药品
是 大理石(或石灰石) ,对比B装置进行实验,其优点
为 可以控制反应的发生和停止 ,检查装置C气密性的操作是
马工程管理学-模拟试卷二
马工程管理学-模拟试卷二管理学模拟试卷2总计:6大题,67小题,共100分答题时间:100一、判断题(该大题共20小题,每小题1分。
)尽量采取授权管理,鼓励下属参与决策。
A.正确B.错误2.与汽车行业相比,潜在进入者对于行业中现有企业所造成的竞争威胁,餐饮业要表现得更为严重些。
A.正确B.错误3.项目计划技术产生于20世纪50年代末期,被最早应用于XXX的北极星武器系统中。
A.正确B.错误4.决策拟定的方案越多越好。
A.正确B.错误5.速动比率用以反映企业流动资产中可以立即用于偿付短期负债的能力。
A.正确B.错误6.员工培训的主要模式是传统意义上的面劈面授课,这种模式在企业实践中是最高效和广泛的培训模式。
A.正确B.错误7.激励控制主要强调的是通过激励调动员工的积极性和创造性从而进行控制。
A.正确B.错误8.决策一定要遵循严格的程序,不能随意跳过任何一个阶段,否则决策就会失误。
A.正确B.错误9.全分解式目标管理有利于促进组织成员的团结、协作,增强组织凝聚力;个人工作压力较小,易出现“平均主义”“大锅饭”现象。
A.正确B.错误10.风险评估的定性分析方法的结果精准度高,易于理解和判断,更利于决策使用。
A.正确B.错误11.冲突产生的必要条件是,存在某种形式的对立或不相容以及相互感化。
A.正确B.错误12.外部选聘的最大优点是能进步构造选聘的效益。
A.正确B.错误13.决策准则或选择标准,是决策者用来比较和选择方案衡量标准,是选择方案、作出最后决定、评价决策结果时的原则。
A.正确B.错误14.当带领者受到下属的喜爱、尊敬和信任,就不需要采取更多任务取向的行为;相反,如果下属不信任,并消极地看待领导者,领导者就只有采取命令的方式才能完成任务。
A.正确B.错误15.信息越多并不能保证决策就越科学。
A.正确B.错误16.决策本质上是一个系统的过程,而不是“瞬间”的决定。
A.正确B.错误A.正确B.错误18.外部审计需要核实财务报表的真实性和有效性,但需要分析组织的财务结构是否合理、评估财务资源的利用效率、检查和分析组织控制系统的有效性、检查经营状况,还要提供改进建议。
医师定期考核模拟试卷-中医类别模拟练习卷2附参考答案
医师定期考核模拟试卷-中医类别模拟练习卷2附参考答案1.保和丸可用于下列病证,除哪项以外A、饮食停滞型胃痛B、饮食积滞型腹痛C、食滞痰阻型积聚D、食滞肠胃型泄泻E、饮食停滞型呕吐※※※※※C2. 救急稀涎散属于羊选题A、开窍剂B、治风剂C、涌吐剂D、祛痰剂E、泻下剂※※※※※C3."十剂"中不包括羊选题A、寒温B、轻重C、滑涩D、燥湿E、宣通※※※※※A4.治疗痈初期的代表方剂是羊选题A、黄连解毒汤B、仙方活命饮C、银翘散D、清瘤散毒饮E、普济消毒饮※※※※※B5.颜面疗疮忌内服发散药的原因是羊选题A、无外感邪毒B、邪毒深在肌肉C、芳香走窜,易使疗毒走散D、邪发于脏腑E、正气内虚)※※※※※C6.疗疮走黄的主要病理是羊选题A、正虚B、邪实C、阴伤D、腑实E、表虚※※※※※B7.乳痈成脓后应及时切开排脓,根据单选题不同情况应选用以下切口,除了A、循乳络方向作放射状切口B、乳晕部做弧形切口C、后位脓肿于乳房下部皱折处切开D、脓肿稍低处E、脓肿顶端※※※※※E8.瘿病的视诊应注意以下几点除了选题A、两侧是否对称B、肿块位置、大小、形态C、邻近血管是否充盈D、是否红肿E、是否随吞咽上下移动※※※※※D9.下列均为瘿病的常见治疗大法,除了A、理气解郁B、解表散寒C、调和冲任D、清热化痰E、化痰软坚※※※※※B10.下列各项均为石瘿特点,除了单选题A、肿块坚硬如石B、肿块高低不平C、不随吞咽上下移动D、多发于中年以上者E、多发于男性※※※※※E11.阴茎海绵体发生纤维性硬结,中医称之为A、子痛B、子痰C、肾岩D、硬下疮E、阴茎痰核※※※※※E11.子痰初起内治宜用羊选题A、透脓散B、五味消毒饮C、黄连解毒汤D、阳和汤E、滋阴除湿汤※※※※※D13.外科疾病以其疼痛的性质来辨,其选题中啄痛,病变部位在A、肌肉B、关节C、皮肉D、皮肤E、肌肤※※※※※A14.决定疮疡的发展和转归的是单选题A、阴阳盛衰B、疮疡病期C、发病部位D、正邪交争E、发病年龄15. 以下哪条与油风的病因病机关系不大A、情志抑郁化火,血热生风,风热上窜巅顶,耗阴伤血,毛发失养B、跌扑损伤,瘀血阻络,或肝郁气滞,血不畅达,清窍失养C、过食油腻食品,加之外受风邪D、久病气血两虚,血不养发E、肝肾不足,精不化血,发失所养系略※※※※※C16.《内经》解剖方面,明确记载内生单选题殖器官的有A、子门B、毛际C、阴户D、廷孔E、小肠※※※※※A17.下列不属于调补冲任法代表方剂的是A、大补元煎B、固冲汤C、补肾固冲丸D、鹿角菟丝子丸E、健固汤※※※※※E18.寒邪客于胞中,阻碍胞脉、胞络,以致冲任壅阻,气血运行不畅,从而可导致妇科诸疾。
2024年全国高考体育单招考试英语模拟试卷试题二(含答案详解)
2024全国普通高等学校运动训练、武术与民族传统体育专业单独统一招生考试模拟卷(二)注意事项:本试卷分为第一、第二两卷。
第一卷三大题,满分120分;第二卷两大题,满分30分,共150分。
第一卷(三大题,共120分)I.单项选择(共20小题;每小题2分,满分40分)从A、B、C、D四个选项中选出可以填入空白处的最佳答案。
1.—It's everyone's duty to join the Clean Your Plate Campaign.—Sure.We should try to all the food that we've ordered.A.give upB.eat upC.turn upD.show up2.Yongzhou is becoming more and more developed—I agree.But sometimes people have great difficulty a place to park their cars.A.foundB.to findC.findingD.find3.Nowadays we can learn a great deal of about the world through the Internet.rmationB.booksC.peopleD.countries4.Hangzhou is to hundreds of foreign friends who are working and studying here.A.roomB.houseC.familyD.home5.—What do you think of your teachers?—Sometimes they are too strict us our study.A.at,withB.at,inC.with,atD.with,in6.—Let's go fishing if it this weekend.—But nobody knows if it.A.is fine;will rainB.will be fine;rainsC.is fine;rainsD.will be fine;will rain7.Mr.Smith a book about China last year but I don't know if he has finished it.A.has writtenB.wroteC.had writtenD.was writing8.Many children in Britain to have their own bank cards these days.A.allowB.allowedC.are allowedD.were allowed9.It's difficult for me the bed.It's too heavy.A.moveB.movedC.movingD.to move10.—Which is month of the year?—July,I thinkA.hotB.hotterC.hotterD.the hottest11.How dangerous!The car hit the bus just now.A.normallyB.seldomC.nearlyD.hardly12.He found impossible to finish so much homework in an hour.A.itB.thisC.thatD.it's13.Anna is middle school student in Chongqing.A.a11years oldB.a11-year-oldC.an11-years-oldD.an11-year-old14.—The red dress be Linda's,but I'm not sure.—No,it be.It is too small for her.A.may;mustn'tB.may;can'tC.can't;may notD.must;can't15.When he was university student,he dreamed of becoming NBA player.A.an;aB.a;anC.an;anD.the;an16.—Do you know when he tomorrow?—Don't worry.I think as soon as he he will give you a call.A.will come;will comeB.will come;comeses;will comees;comes17.The restaurant wants a waiter can speak French.A.whereB.whichC.whatD.who18.—What are you looking for?—I'm looking for the music CD you lent me yesterday.A.whoB.whomC.whenD.that19.It is in1960Chinese first put our flag on Mount Qomolangma.A.whenB.thatC.whichD.in which20.Michael Jordan has failed over and over again in his life.And that's he succeeds.A.whatB.whenC.whyD.whereII.完形填空(共10小题;每小题2分,满分20分)阅读下面的短文,掌握其大意,然后从21至30各题所给的A、B、C、D四个选项中,选出一个最佳答案。
河南省2023年九年级中考数学 模拟试卷(二)
NMEODCBA2022-2023学年第二学期九年级一模考试数学模拟试卷(二)注意事项:1.本试卷共8页,三大题,满分120分,考试时间100分钟.请用蓝、黑色钢笔或圆珠笔直接答在试卷上.2.答题前将密封线内的项目填写清楚.题号一二三总分16 17 18 19 20 21 22 23分数一、选择题(每小题3分,共30分)1.下列各数中最大的数是【】(A)π(B)17(C)4 (D)-82.我省2016年全年生产总值达到约19 367亿元,19367亿元用科学记数法表示为【】(A)1119.36710⨯元(B)121.936710⨯元(C)130.1936710⨯元(D)131.936710⨯元3.下列几何体是由4个相同的小正方体搭成的,其中主视图和左视图相同的是【】(A)(B)(C)(D)4.如图,直线a,b被直线c,d所截,若∠1=∠2,∠3=125°,则∠4的度数为【】(A)75 (B)70 (C)60 (D)555.下列计算正确的是【】(A)228=-(B)()632=-(C)22423aaa=-(D)()523aa=-6. 不等式组3252(2)1xx-<⎧⎨-≤⎩的解集是【】得分评卷人考号:班级:姓名:(A ) 无解 (B )1x <- (C )52x ≥(D )512x -<≤ 7.从九年级一班3名优秀班干部和九二班2名优秀班干部中随机抽取两名学生担任升旗手,则抽取的两名学生刚好一个班的概率为【 】(A )45 (B )35 (C )25(D )158.为了解长城小区“全民健身”活动的开展情况,随机对居住在该小区的部分居民一周的体育锻炼时间进行了抽样统计,结果如下表:锻炼时间(时) 3 4 5 6 7 人数(人)6141541则关于居民一周体育锻炼时间,下列说法错误的是【 】(A )众数是5小时(B )中位数是4小时(C )平均数是4.5小时(D )样本容量是40 9.如图,已知△ABC ,∠ACB =90°,BC=3,AC=4,小红按如下步骤作图:①分别以A ,C 为圆心,以大于12AC 的长为半径在AC 两边作弧,交于两点M ,N ;②连接MN ,分别交AB ,AC 于点D ,O ;③过C 作CE ∥AB 交MN 于点E ,连接AE ,CD .则四边形ADCE 的周长为【 】(A )10(B )20(C )12(D )24(第9题 ) (第10题)10.如图所示,在平面直角坐标系中,半径均为1个单位长度的半圆O 1,O 2,O 3,…组成一条平滑的曲线.点P 从原点D 出发,沿这条曲线向右运动,速度为每秒2π个单位长度,则第2015秒时,点P 的坐标是【 】 (A )(2014,0)(B )(2015,-1) (C )(2015,1) (D )(2016,0)二、填空题(每小题3分,共15分) 11.计算:01(3)3--+= .12.若关于x 的一元二次方程032=-+k x x 有两个不相等的实数根,则k 的取值范围是_ _.13.已知A(0,3),B(2,3)是抛物线cbxxy++-=2上两点,该抛物线的顶点坐标是 .14.如图,在扇形AOB中,∠AOB=90°,点C为OA的中点,CE⊥OA交弧AB 于点E,以点C 为圆心,OA的长为直径作半圆交OE于点D.若OA=4,则图中阴影部分的面积为 .(第14题)(第15题)15.如图,在矩形ABCD中,BC=3,CD=4,点P是AB上(不含端点A,B)任意一点,把△PBC 沿PC折叠,当点B的对应点B′落在矩形ABCD对角线上时,BP=.三、解答题(本题共8个小题,满分75分)16.(8分)先化简22121x xxx x x--⎛⎫÷-⎪+⎝⎭,然后从-1,0,1,2中选取一个合适的数作为x的值代入求值. 得分评卷人17.(9分)为了了解学生在一年中的课外阅读量,九(1)班对九年级800名学生采用随机抽样的方式进行了问卷调查,调查的结果分为四种情况:A.10本以下;B.10~15本;C.16~20本;D.20本以上.根据调查结果统计整理并制作了如图所示的两幅统计图表:(1)在这次调查中一共抽查了名学生;(2)表中x,y的值分别为:x= ,y= ;(3)在扇形统计图中,C部分所对应的扇形的圆心角是度;(4)根据抽样调查结果,请估计九年级学生一年阅读课外书20本以上的学生人数.18. (9分)如图,△ABC中,AB=AC,以AB为直径的半圆O交BC于点D,交AC于点E.(1)求证:△OBD≌△OED;(第18题)(2)填空:①当∠BAC= 度时,CA是⊙O的切线;②当∠BAC= 度时,四边形OBDE是菱形19. (9分)某中学九年级数学兴趣小组想测量建筑物AB的高度.他们在C处仰望建筑物顶端,得分各种情况人数统计频数分布表课外阅读情况 A B C D频数20 x y 40得分得分评卷人测得仰角为48°,再往建筑物的方向前进6米到达D 处,测得仰角为64°,求建筑物的高度.(测角器的高度忽略不计,结果精确到0.1米)(参考数据:sin48°≈710,tan48°≈1110,sin64°≈910,tan64°≈2.)(第19题)20.(9分)如图,矩形OABC 的顶点A ,C 分别在x 轴和y 上,点B 的坐标为(-2,3),双曲线(0)k y x x=< 的图象经过BC 的中点D ,且与AB 交于点E ,连接D ,E .(1)求k 的值及点E 的坐标.(2)若点F 是OC 边上一点,且∠BDE=∠CFB ,求点F 的坐标.(第20题)21. (10分)学校准备购进一批节能灯,已知1只A 型节能灯和3只B 型节能灯共需26元;3只A 型节能灯和2只B 型节能灯共需29元.(1)求一只A 型节能灯和一只B 型节能灯的售价各是多少元?得分 评卷人得分 评卷人(2)学校准备购进这两种型号的节能灯共50只,并且A型节能灯的数量不多于B型节能灯数量的3倍,请设计出最省钱的购买方案,并说明理由.如图1,△ABC和△ADE均为等边三角形,点D在BC的延长线上,连接CE,请填空:①∠ACE的度数为;②线段AC、CD、CE之间的数量关系为.(2)拓展探究如图2,△ABC和△ADE均为等腰直角三角形,∠BAC=∠DAE=90°,点D在边BC的延长线上,连接CE请判断∠ACE的度数及线段AC、CD、CE之间的数量关系,并说明理由.(3)问题解决如图3,在Rt△ABC中,AC=3,BC=5,∠ACB=90°,若点P满足PA=PB,∠APB=90°,请直接写出线段PC的长度.23.(11分)如图,抛物线y=-x 2+bx+c 与直线221+=x y 交于C 、D 两点,其中点C 在y 轴上,点D 的坐标为)273(,. 点P 是y 轴右侧的抛物线上一动点,过点P 作PE ⊥x 轴于点E ,交CD于点F.(1)求抛物线的解析式;(2)若点P 的横坐标为m ,当m 为何值时,以O 、C 、P 、F 为顶点的四边形是平行四边形?请说明理由.....相应的点P 的坐标.(第23题)备用图。
物理试卷-期中模拟2
期中模拟-02 20221028一、填空题1.如图,四个相同的瓶子里装有高度不同的水,对着瓶口吹气,发出的音调最高的是______。
2.如下表是小明某次步行后手机软件“∗∗运动”记录的数据。
如果小明步长是0.5m,那么他步行的速度是______m/s。
∗∗运动步数时长(分钟)节省汽油(升)甩脂量(克) 6000500.3316.13.如图是小明同学玩滑板车的情景,小明蹬地使滑板车开始运动后双脚离地直至滑板车停止。
这一过程中小明______(选填“是”或“不是”)做匀速直线运动。
滑行时小明发现路旁边的树木在往后退,这是因为他以______作为参照物。
双脚离地后小明站立在滑板车上滑行的一段过程中,5s内小明滑行了15m,则相对于滑板车,小明滑行的速度是______m/s。
4.如图所示,将一把钢尺紧按在桌面上,一端伸出桌面适当的长度,拨动钢尺,就可以听到声音,这是因为钢尺______发出了声音,保持伸出桌面钢尺长度不变,改用更大的力拨动钢尺,则听到声音的______(选填“音调”“音色”或“响度”)变大;逐渐增加钢尺伸出桌面的长度,每次用同样大小的力拨动钢尺,是为研究______。
5.下列物态变化中:①洒在地上的水慢慢变干;②放入衣箱中的樟脑球变小;③冬天玻璃窗上形成的“冰花”;④出炉的钢水变成钢锭;⑤河水结冰;⑥早晨草地上的霜。
其中属于凝华的是______。
属于吸热过程的是______(填写序号)。
6.我们生活在一个有声世界里,我们听到的所有声音都是由物体的______产生的;在下列4个选项中,不能传声的有______(选填序号);①空气;②水;③钢铁;④真空某一装满水长100m的直钢管,在其一端用力敲击一下,在另一端能听到敲击声的次数为______(填选项)。
[已知声速:在空气中约为340m/s,在水中约为1500m/s,在钢铁中约为5200m/s;一般人耳区分两次声音的时间间隔为0.1s以上]A.1次B.2次C.3次D.以上次数都有可能7.如图所示,木块的长度为______cm二、单选题8.用刻度尺测量物理课本的长,以下哪个是产生误差原因( )A. 观察刻度尺时,视线没有跟刻度尺尺面垂直B. 刻度尺没有跟课本的长边平行C. 读数时,最小刻度的下一位数值估计不准确D. 刻度尺的刻度线没有紧贴课本9.图示为我国民族吹管乐器−唢呐,用它吹奏名曲《百鸟朝凤》时,模仿的多种鸟儿叫声悦耳动听,让人仿佛置身于百鸟争鸣的森林之中,关于唢呐,下列说法正确的是( )A. 用不同的力度吹奏,主要改变声音的音调B. 吹奏时按压不同位置的气孔,主要改变声音的响度C. 唢呐前端的喇叭主要改变声音的音色D. 唢呐模仿的鸟儿叫声令人愉悦,是乐音10.如图,沿同一条直线向东运动的物体A、B,其运动相对同一参考点O的距离S随时间t变化的图象,以下说法正确的是( )①两物体由同一位置O点开始运动,但物体A比B迟3s才开始运动;②t=0时刻,A在O点,B在距离O点5m处;③从第3s开始,v A>v B,5s末A、B相遇;④5s内,A、B的平均速度相等;⑤t=3s时,A、B相距8m。
2023-2024学年小学语文三年级上册期末模拟试卷二(部编版含答案)
2023-2024学年三年级语文上册期末模拟试卷二(部编版)(时间:90分钟 满分:100分)卷首寄语:亲爱的小朋友,经过一个学期的学习,你一定有不少的收获吧!请仔细审题,看清要求,认真答卷,祝你考出好成绩,加油!一、卷面书写。
(3分)1.把请正确抄写下面句子,要求做到书写规范、整洁、行款整齐、美观。
生活中不缺少美,只是缺少发现美的眼睛。
二、填空题。
(共26分)2.读下面一段话,根据拼音在田字格里规范地写词语。
(5分)小妹妹用各种yán liào 在纸上画了很多图案,有là zhú、zh ī zh ū、m ǎ y ǐ,还有鸟的chì b ǎng等,我们给妹妹起了一个外号叫“小画家”。
3.比一比,再组词。
(5分)挡( ) 载( ) 杨( ) 飘( ) 匆( )档( ) 栽( ) 扬( ) 漂( ) 忽( )4.把词语补充完整,并选词填空。
(8分)披( )散( ) ( )忙( )乱 ( )高( )爽( )( )累累 四( )( )稳 ( )红( )赤(1)学生要注意仪容仪表,不可以。
(2)树上,压得树枝都弯下来了。
5.根据所学知识填空。
(8分)(1)有理走遍天下,______________。
(2)_________________,一个好汉三个帮。
(3)乱入池中看不见,__________________。
(【唐】王昌龄《采莲曲》)(4)_________________,潭面无风镜未磨。
(【唐】刘禹锡《望洞庭》)(5)两岸青山相对出,__________________。
(【唐】李白《望天门山》)(6)_________________,淡妆浓抹总相宜。
(【宋】苏轼《饮湖上初晴后雨》)(7)朝辞白帝彩云间,__________________。
(【唐】李白《朝发白帝城》)(8)___________________,最是橙黄橘绿时。
(【宋】苏轼《赠刘憬文》)三、选择题。
上海市2023届高考模拟英语试卷(2)
上海市2023届高考模拟英语试卷(2)一、听力选择题1.A.Depressed.B.Uncertain.C.Sad.D.Relived.2. Where will the woman go?A.To the Canadian market.B.To the French market.C.To the Australian market.3. Where is Jennifer working now?A.In a college.B.In a hospital.C.In a drug store.4. How much will the woman charge the man?A.$200.B.$250.C.$300.5. What are the speakers mainly talking about?A.Why the cheese factory is closing.B.When the cheese factory is closing.C.Whether the cheese factory is closing.二、听力选择题6. 听下面一段较长对话,回答以下小题。
1. Why is the woman nervous about meeting the man’s sister?A.Because his sister doesn’t invite her.B.Because she’s never met his sister before.C.Because she doesn’t know how to talk to strangers.2. What does the man offer to do for the woman first?A.Introduce her to others.B.Prepare some food for her.C.Show her around the room.3. What is the man’s attitude towards the people at the party?A.Positive.B.Negative.C.Indifferent.4. What is the probable relationship between the speakers?A.Friends.B.Brother and sister.C.Father and daughter.7. 听下面一段较长对话,回答以下小题。
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试卷代号 座位号
2001-2002学年度第二学期期末考试
《多媒体技术基础及应用》试题(B )
一、 单项选择题(每小题1分,共10分)
(从提供的四个答案中选择正确的答案,并将其编号填入括号中) 1. 频率为25帧/秒的制式为( )
(A) PAL
(B) SECAM
(C) NTSC
(D) YUV
2.在JPEG 中使用了哪两种熵编码方法( )。
(A) 统计编码和算术编码。
(B) PCM 编码和DPCM 编码。
(C) 预测编码和变换编码。
(D) 哈夫曼编码和自适应二进制算术编码。
3.音频卡是按( )分类的。
(A ) 采样频率
(B ) 声道数
(C ) 采样量化位数
(D ) 压缩方式
4.全电视信号主要由( )组成。
(A ) 图像信号、同步信号、消隐信号。
(B ) 图像信号、亮度信号、色度信号。
(C ) 图像信号、复合同步信号、复合消隐信号。
(D ) 图像信号、复合同步信号、复合色度信号。
5.下列哪种说法不正确( )。
(A)预测编码是一种只能针对空间冗余进行压缩的方法。
(B)预测编码是根据某一模型进行的。
(C)预测编码需将预测的误差进行存储或传输。
(D)预测编码中典型的压缩方法有DPCM、ADPCM。
6.在MPEG中为了提高数据压缩比,采用了哪些方法()。
(A)运动补偿与运动估计。
(B)减少时域冗余与空间冗余。
(C)帧内图像数据与帧间图像数据压缩。
(D)向前预测与向后预测。
7.下列数字视频中哪个质量最好()。
(A)240×180分辩率、24位真彩色、15帧/秒的帧率。
(B)320×240分辩率、30位真彩色、25帧/秒的帧率。
(C)320×240分辩率、30位真彩色、30帧/秒的帧率。
(D)640×480分辩率、16位真彩色、15帧/秒的帧率。
8.下列哪种论述是正确的()。
(A)音频卡的分类主要是根据采样的频率来分,频率越高,音质越好。
(B)音频卡的分类主要是根据采样信息的压缩比来分,压缩比越大,音质越好。
(C)音频卡的分类主要是根据接口功能来分,接口功能越多,音质越好。
(D)音频卡的分类主要是根据采样量化的位数来分,位数越高,量化精度越高,音
质越好。
9.对电视图像信号进行马赛克处理时,要运用抽边算子进行抽边运算,用()方法可以保证对视频信号的实时处理?
(A)HDTV,PDA
(B)AVK,DSP
(C)AVSS,LUT
(D)DSP,LUT
10.基于内容检索要解决的关键技术是()。
(A)多媒体特征提取和匹配。
(B)动态设计。
(C)多媒体数据管理技术。
(D)多媒体数据查询技术。
二、多项选择题(每小题2分,共10分)
(从提供的四个答案中选择正确的答案,并将其编号填入括号中)
1.下列哪些说法是正确的()。
(A)冗余压缩法不会减少信息量,可以原样恢复原始数据。
(B)冗余压缩法减少了冗余,不能原样恢复原始数据。
(C)冗余压缩法是有损压缩法。
(D)冗余压缩的压缩比一般都比较小。
2.下面哪些是称得上是多媒体操作系统()。
(A)Windows98
(B)Quick Time
(C)Avss
(D)Ark
3.A VE是由哪几部分组成( )。
(A)视频子系统、音频子系统、视频音频总线
(B)彩色键连子系统、获取子系统
(C)CD-ROM子系统
(D)主机接口子系统
4.请根据多媒体的特性判断以下哪些属于多媒体的范畴()。
(A)交互式视频游戏
(B)有声图书
(C)彩色画报
(D)立体声音乐
5.下面硬件设备中哪些是多媒体硬件系统应包括的()。
(A)计算机最基本的硬件设备。
(B)CD-ROM。
(C)音频输入、输出和处理设备。
(D)多媒体通信传输设备。
三、填空题(每空1分,共20分)
1.多媒体计算机技术是综合处理声、文、图、等信息。
它具有信息载体的、和。
2.比较流行的静态图像文件格式是:,,TGA,,及MMP。
3.量化方法分为为量化和量化。
4.多媒体数据库基于内容的检索的体系结构为子系统和子系统。
5.在多媒体系统中,音频信号可分为两类:和。
6.音乐必备的三要素是: 、 和 。
7.HIS 彩色空间表示中的H 、S 、I 分别代表 、 、 。
8.声音卡是按____ _____分类的。
四、简答题(每小题
4分,共20分)
1、理想多媒体系统的设计原则
2、衡量数据压缩技术性能的重要指标是什么。
3、音频卡的主要功能是什么?
4、多媒体创作工具可分成哪几类?
5、MPEG 图像的三种类型:I 帧、P 帧、B 帧,若显示的顺序为:
1
2 3 4 5 6 7 I B B P B B P
那么,传输的顺序应如何?依据是什么?
五、论述题(1小题,10分)
1、视频会议系统的组成及各部分的功能。
六、综合题(3小题,共30分)
1. 已知信源:
对其进行Huffman 编码,并计算其平均码长。
(7分) 2. 信源X 中有16个随机事件,即n=16。
每一个随机事件的概率都相等,即
P(x 1)=P(x 2)=P(x 3)……P(x 8)=116
,计算信源X 的熵。
(8分) 3. 已知某亮度子块按Z 序编码前的系数如下表所示,假定前一块的DC 系数为12,请参照基本熵编码符号—2结构表、亮度DC 系数表和亮度AC 系数表,进行JPEG 编码,写出编码过程和结果。
(15分)
X =
X 1 X 2 X 3 X 4 X 5 X 6 X 7 0.35 0.20 0.15 0.10 0.10 0.06 0.04
12 5 0 0 0 0 0 0
-2 2 0 0 0 0 0 0
0 1 0 0 0 -1 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
表1:基本熵编码符号—2结构表
表2亮度DC系数表
表3:亮度AC系数表。