【历史】陕西省咸阳市2019-2020学年高一上学期期末教学质量检测试题(扫描版)
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【期末试卷】2019-2020学年高一上学期期末考试英语试卷(新高考卷)笔试部分附参考答案按秘密级事项管理★启用前2019-2020 高一上学期期末考试英语试卷(新高考卷)注意事项:1. 答卷前,考生务必将自己的姓名、考生号等填写在答题卡和试卷指定位置上。
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如需改动,用橡皮擦干净后,再选涂其他答案标号。
回答非选择题时,将答案写在答题卡上。
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第一部分阅读(共两节,满分50分)第一节(共15小题;每小题2.5分,满分37.5 分)阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。
AArtificial intelligence (AI) is practically everywhere today. There are so many products out there which use AI. Some are being developed, some are already in use, and some failed and are being improved, so it’s very difficult to name a few of them and regard them as the best.ViIt is an AI personal trainer which is mainly concerned with fitness and coaching. It, however, requires the use of bio-sensing earphones and other fitness tracking equipment (设备)! It can play your favourite music while you work out and all you have to worry about is the exercise you’re doing.Deep TextDo you ever wonder how an ad appears suddenly just whenyou are looking for something similar? This is because of Deep Text. It uses real-time consumer (消费者) information to produce data which in turn is used to target consumers. Thus, if you search online for flight tickets from Bangalore to Delhi, it is very likely that an ad relating to hotels in Delhi will soon follow.Hello EggIf you live alone and miss your mother because you always miss your breakfast or don’t know what to eat for dinner, the n Hello Egg is exactly what you are looking for. A very healthy choice of the 2-minute noodles and oats, Hello Egg provides you with a detailed weekly meal plan about the needs of your body. It is truly a modern AI-powered home cooking tool for the young.WordsmithYou can put Mr. Smith into your Microsoft Excel using their free API, and let it write up detailed analysis (分析) of the stories behind your numbers. It can produce detailed reports on thousands of pages of spreadsheets in seconds.1.What can we learn about Vi from the text?A. It is an AI music player.B. It is a bio-sensing earphone.C. It doesn’t work without bio-sensing earphones.D. It can make you more energetic while you work out.2. Which can help you improve cooking skill?A.Hello Egg.B.Deep Text.C.Vi.D.Wordsmith.3. What can Wordsmith do for us?A.Produce a detailed report.B.Book a ticket ahead of time.C.Provide us with a detailed meal plan.D.Offer us information on hotels for traveling.BA couple in their 60s has travelled 12,000 miles across 16 countries from Britain to China — riding their bikes the entire way. Grandparents Peter and Chris stepped on the long journey after deciding to “do something a bit different”. They traversed (横穿) cities, deserts, mountains and everything in between across Europe, the Middle East and the East Asia. The married couple of 37 years enjoyed themselves with delicious local food and spent most nights inside a tiny tent put up wherever they could find shelter.Peter, 66, said the moment they finally had a look at the famous Great Wall after a year and a half of cycling 30 miles a day was “really exciting”. At the end of their journey, the special pair didn’t fly home but instead choose to book a cabin (舱) inside a 400m-long container ship. The final part was a three-week voyage from Singapore across the Indian Ocean and into the Mediterranean Sea before arriving at Southampton.“You never know what the day is going to bring. All you know is that you aregoing to get on your bike and cycle. Every day is an adventure and every day is new. Overall, the experience is absolutely unbelievable, ” Peter said.Peter and Chris initially set out to cycle from Britain in January 2017 but were forced home. They had cycled all the way to Hungary when Peter slipped on tiles and broke his leg. After seven months of recovery, the couple set out again in Britain. They finally arrived in China in November 2018.Both Peter and Chris agreed that the best part of the entiretrip was coming across the kindness of strangers along the way, many of whom invited the couple for food and drink. Chris, 64, said, “It was a wonderful experience, particularly wonderful because of the amazing people we met along the way.”4.What’s the couple’s purpose of taking the long journey?A.To try something new.B.To break the world record.C. To go across 16 countries by bike.D. To celebrate their 37-year marriage.5. How did the couple go back to their home after the trip to China?A. By cycling.B. By train.C. By plane.D. By sea.6. Why did the couple put off their trip in 2017?A. Peter had an accident.B. They ran out of their money.C. They met with a heavy snow.D. Peter fell ill suddenly in Hungary.7. What’s the best part of the trip for the couple?A. The beautiful scenes.B. The help from others.C. The delicious food and drink.D. The kindness from other cyclists.CHundreds of thousands of lives were saved in 2017 alone because of the improvement of the environment, according to a new research. Fine particle pollution declined rapidly following the new rules on industrial emissions and the promotion of cleanfuels, according to the study, published on Monday in the National Academy of Sciences of the United States of America. The study, which focused on the period from 2013-2017, was conducted by a group of Chinese researchers and scientists.PM2.5, as this kind of pollution is known, is so small that it can enter the bloodstream, potentially leading to cancer, stroke and heart attack in the long term. After rapid industrialization and weak regulations left the country with a reputation for smog and bad air quality, Chinese authorities started to take air pollution seriously in 2008.In 2013, Beijing had PM2.5 concentrations 40 times higher than levels recommended by the World Health Organization (WHO), and the governmentintroduced its toughest-ever clean air policies that year. The study found “signif icant declines” in PM2.5 levels across China from 2013-2017, with new standards for thermal power plants and industrial boilers, the replacement of old factories, and new emissions rules for vehicles. The authors say this “confirms the effectiveness of Chi na’s recent clean air actions.”These recent actions have seen Beijing fall out of the top 100 most-polluted cities in Asia in recent years, with the pollution levels 10% lower across Chinese cities between 2017 and 2018, according to a report by Greenpeace and AirVisual. Shanghai, the country’s largest city and financial capital, has also made environmental advances, such as adopting strict recycling regulations. Public pressure has been the driving force of pollution policy in China.Air pollution is a global issue, and India is now home to 22 of the 30 most polluted world cities, according to the Greenpeace and AirVisual report. In the US, a recent study said air pollutionwas linked to more than 107,000 deaths in 2011 and cost the country $866 billion.8. What saved many lives in China?A. China’s clean air policies.B. The increased particle pollution.C. The study by researchers.D. The reduction of the clean fuels.9. Why did PM2.5 cause many diseases?A. It was called smog.B. It made the air cleaner.C. It went into the blood.D. It had a bad reputation.10. When did Chinese government decide to treat the pollution?A. In 2008.B. In 2013.C. In 2017.D. In 2018.11. What did people in Shanghai do to protect the environment?A. They built the thermal power plants.B. They stopped using industrial boilers.C. They made Shanghai financial capital.D. They tried to recycle some rubbish.DIn the 1994 film Forrest Gump, there’s a famous saying, “Life is like a box of chocolates; you never know what you’re gonna get.” The surprise is part of the fun. Now blind box toys are bringing the magic of surprise to online shopping.A blind box toy is hidden inside uniform packaging(包装) butinvisible from the outside. You don’t know what will be inside, although the toys typically come from pop culture, ranging from movies to comics and cartoons.Blind boxes have caught on since they were first introduced from Japan to China in 2014. According to a 2019 Tmall report, the mini-series of Labubu blind box. designed by Hong Kong -born Kasing Lung, was named Champion of Unit Sales with 55,000 sold in just 9 seconds during the Singles Day shopping event. Most customers for blind boxes are young people aged 18 to 35.According to The Paper, blind box toys are popular in part because of their cute appearances. The typically cute cartoon figurines (小塑像) come in miniature (微型的) sizes, making them suitable for display almost anywhere.Even if blind boxes are not their top choice for decorations(装饰品), the mystery and uncertainty of the process also attracts people. It’s the main reason why people buy blind boxes one after another.“Fear of the unknown is always a part of the box-opening process,” said Miss Cao, 24, who lives and works in Shenyang. Speaking to Sina News, she said: “Until you open all the boxes, you cannot know what it is inside.”Opening a blind box is a delightful little surprise for our mundane daily lives, something small but fun to wait for each day, week or month. When people open this simple little box, they may be disappointed, but the uncertainty is part of the fun. People will open more blind boxes and hope for a better outcome.When someone re-makes Forrest Gump, don't be surprised if he says, “Life is like a blind box.”12.What feature of blind boxes attracts people?A.They often get toys designed by famous artists.B.They don’t know what they’ve got until they open them.C.They can learn about pop culture from the packaging.D.They can experience the excitement of online shopping.13.Why does Miss Cao love blind box toys?。
陕西省咸阳市2019-2020学年高二上学期期末考试数学(理)试卷一、选择题(本大题共12小题,共60.0分)1.与命题“若,则”等价的命题是A. 若,则B. 若,则C. 若,则D. 若,则2.在等比数列中,若,是方程的两根,则的值为A. 6B.C.D. 13.设,则下列不等式一定成立的是A. B. C. D.4.命题“”的否定是()A. B.C. D.5.不等式的解集为A. B.C. D. 或6.命题甲:是命题乙:的()A. 充分不必要条件B. 必要不充分条件C. 充要条件D. 既不充分也不必要条件7.中,a,b,C分别是角A,B、C所对应的边,,,,则A. 或B.C. 或D.8.设实数,,则A. B. C. D.9.已知x,y满足约束条件,则z=x+3y的最小值为A. 0B. 2C. 6D. 810.在等差数列中,已知,且,则中最大的是A. B. C. D.11.如图,在四面体中,、分别在棱、上,且满足,,点是线段的中点,用向量,,表示向量应为()A.B.C.D.二、填空题(本大题共4小题,共20.0分)13.已知,2,,且,则______.14.若一元二次不等式的解集是,则a的值是______.15.已知两个正实数x,y满足,且恒有,则实数m的取值范围是______.16.当双曲线M:的离心率取得最小值时,双曲线M的渐近线方程为______.三、解答题(本大题共6小题,共70.0分)17.已知为等差数列,且,.求的通项公式;若等比数列满足,,求的前n项和公式.18.在中,角A,B,C的对边分别为a,b,c,且.1求角A的大小;2若,,求a的值.19.直三棱柱中,底面ABC为等腰直角三角形,,,,M是侧棱上一点,设,用空间向量知识解答下列问题.1若,证明:;2若,求直线与平面ABM所成的角的正弦值.20.已知椭圆C:过点,,直线l:与椭圆C交于,两点.1求椭圆C的标准方程;2已知点,且A、M、N三点不共线,证明:是锐角.21.如图,已知平面ACD,平面ACD,为等边三角形,,F为CD的中点.求证:平面BCE;求二面角的余弦值的大小.22.已知抛物线E:的焦点为F,是抛物线E上一点,且.1求抛物线E的标准方程;2设点B是抛物线E上异于点A的任意一点,直线AB与直线交于点P,过点P作x轴的垂线交抛物线E于点M,设直线BM的方程为,k,b均为实数,请用k的代数式表示b,并说明直线BM过定点.陕西省咸阳市2019-2020学年高二上学期期末考试数学(理)试卷参考答案一、选择题(本大题共12小题,共60.0分)1.与命题“若,则”等价的命题是A. 若,则B. 若,则C. 若,则D. 若,则【答案】C【解析】【分析】根据原命题与其逆否命题为等价命题,转化求逆否命题即可.【详解】其等价的命题为其逆否命题:若x2-2x-3≠0,则x≠3.【点睛】本题考查原命题与其逆否命题等价性以及会写逆否命题,考查基本应用能力.2.在等比数列中,若,是方程的两根,则的值为A. 6B.C.D. 1【答案】B【解析】【分析】利用韦达定理和等比数列的通项公式直接求解.【详解】在等比数列中,,是方程的两根,.的值为.故选:B.【点睛】本题考查等比数列中两项积的求法,考查韦达定理和等比数列的通项公式等基础知识,考查运算求解能力,是基础题.3.设,则下列不等式一定成立的是A. B. C. D.【答案】B【解析】【分析】直接利用不等式性质:在两边同时乘以一个负数时,不等式改变方向即可判断.【详解】,,,故选:B.【点睛】本题主要考查了不等式的性质的简单应用,属于基础试题.4.命题“”的否定是()A. B.C. D.【答案】D【解析】【分析】直接利用全称命题的否定是特称命题写出结果即可.【详解】因为全称命题的否定是特称命题,所以,命题“,”的否定是:,.故选:D.【点睛】本题考查命题的否定,特称命题与全称命题的否定关系,基本知识的考查.5.不等式的解集为A. B.C. D. 或【答案】C【解析】【分析】将分式不等式转化为一元二次不等式,进行求解即可.【详解】不等式等价为,得,即,即不等式的解集为,故选:C.【点睛】本题主要考查分式不等式的求解,将其转化为一元二次不等式是解决本题的关键.6.命题甲:是命题乙:的()A. 充分不必要条件B. 必要不充分条件C. 充要条件D. 既不充分也不必要条件【答案】A【解析】分析:根据命题甲和命题乙的关系,即可判定甲乙的关系,得到结果.详解:由命题乙:,即,所以命题甲:是命题乙:的充分不必要条件,故选A.点睛:本题主要考查了充分不必要条件的判定,熟记充分不必要条件的判定方法是解答的关键,着重考查了推理与运算能力.7.中,a,b,C分别是角A,B、C所对应的边,,,,则A. 或B.C. 或D.【答案】A【解析】【分析】根据正弦定理和大边对大角,可得答案.【详解】由,,,可得;正弦定理:,可得解得:;,或;故选:A.【点睛】本题考查三角形的正弦定理和内角和定理的运用,考查运算能力,属于基础题.8.设实数,,则A. B. C. D.【答案】A【解析】【分析】利用分子有理化进行化简,结合不等式的性质进行判断即可.【详解】.,,,,即,故选:A.【点睛】本题主要考查式子的大小比较,利用分子有理化进行化简是解决本题的关键.9.已知x,y满足约束条件,则z=x+3y的最小值为A. 0B. 2C. 6D. 8【答案】B【解析】【分析】作出平面区域,平移直线x+3y=0确定最优解,再求解最小值即可.【详解】作出x,y满足约束条件所表示的平面区域如图,作出直线x+3y=0,对该直线进行平移,可以发现经过点A(2,0)时Z取得最小值:2;故答案为:B.【点睛】(1)本题主要考查线性规划问题,意在考查学生对这些知识的掌握水平和数形结合分析推理能力.(2) 解答线性规划时,要加强理解,不是纵截距最小,就最小,要看函数的解析式,如:,直线的纵截距为,所以纵截距最小时,最大.10.在等差数列中,已知,且,则中最大的是A. B. C. D.【答案】B【解析】【分析】由已知结合等差数列的性质可判断出a6>0,a7<0,从而可得和取最大值时的条件.【详解】∵等差数列{a n}中,a3+a10<0,∴a6+a7=a3+a10<0,∵S110,∴a1+a11>0,∴a1+a11=2a6>0,∴a6>0,a7<0,则当n=6时,S n有最大值.故选:B.【点睛】本题考查了等差数列的性质与求和公式的应用,考查了推理能力与计算能力,属于中档题.11.如图,在四面体中,、分别在棱、上,且满足,,点是线段的中点,用向量,,表示向量应为()A.B.C.D.【答案】A【解析】,化简得到,故选A.12.设抛物线C:的焦点为F,点M在抛物线C上,,线段MF中点的横坐标为,若以MF为直径的圆过点,则抛物线C的焦点到准线的距离为A. 4或8B. 2或8C. 2或4D. 4或16【答案】B【解析】【分析】利用抛物线的定义和中点坐标公式和与y圆相切的条件,求出,代入抛物线方程即可求出p.【详解】解:抛物线C方程为,焦点,准线方程为,设,由抛物线性质,可得,因为圆心是MF的中点,所以根据中点坐标公式可得,圆心横坐标为,由已知圆半径也为,据此可知该圆与y轴相切于点,故圆心纵坐标为2,则M点纵坐标为4,即,代入抛物线方程得,所以或,则焦点到准线距离为2或8.故选:B.【点睛】本题考查抛物线的定义和性质,其中要注意以焦半径为直径的圆与y轴相切,属于中档题.二、填空题(本大题共4小题,共20.0分)13.已知,2,,且,则______.【答案】【解析】【分析】利用向量共线的充要条件:坐标交叉相乘的积相等,列方程求x值.【详解】解:,.故答案为:【点睛】解决向量共线问题,一般利用向量共线的充要条件:坐标交叉相乘的积相等找解决的思路.14.若一元二次不等式的解集是,则a的值是______.【答案】【解析】【分析】根据一元二次不等式和对应方程的关系,利用根与系数的关系求出a的值.【详解】一元二次不等式的解集是,则和是一元二次方程的实数根,,解得.故答案为:.【点睛】本题考查了一元二次不等式与对应方程的应用问题,是基础题.15.已知两个正实数x,y满足,且恒有,则实数m的取值范围是______.【答案】【解析】【分析】先用基本不等式求出的最小值,然后解一元二次不等式得到结果.【详解】解:,,,,当且仅当,时,取等号,恒成立等价于,故答案为:.【点睛】本题考查利用基本不等式求最值,属基础题.16.当双曲线M:的离心率取得最小值时,双曲线M的渐近线方程为______.【答案】【解析】【分析】求出双曲线离心率的表达式,求解最小值,求出m,即可求得双曲线渐近线方程.【详解】解:双曲线M:,显然,双曲线的离心率,当且仅当时取等号,此时双曲线M:,则渐近线方程为:.故答案为:.【点睛】本题考查双曲线渐近线方程的求法,考查基本不等式的应用,属于基础题.三、解答题(本大题共6小题,共70.0分)17.已知为等差数列,且,.求的通项公式;若等比数列满足,,求的前n项和公式.【答案】(1);(2).【解析】【分析】设等差数列的公差为d,由已知列关于首项与公差的方程组,求得首项与公差,则的通项公式可求;求出,进一步得到公比,再由等比数列的前n项和公式求解.【详解】为等差数列,设公差为d,由已知可得,解得,.;由,,等比数列的公比,的前n项和公式.【点睛】本题考查等差数列的通项公式,考查等比数列的前n项和,是中档题.18.在中,角A,B,C的对边分别为a,b,c,且.1求角A的大小;2若,,求a的值.【答案】(Ⅰ);(Ⅱ).【解析】【分析】Ⅰ由正弦定理化简已知等式可得:,结合,利用两角和的正弦函数公式可求,结合范围,可求A的值.Ⅱ利用三角形的面积公式可求,进而根据余弦定理即可解得a的值.【详解】Ⅰ由正弦定理可得:,,,,可得:,,,可得:,Ⅱ,可得:,,.【点睛】本题主要考查了正弦定理,两角和的正弦函数公式,三角形的面积公式,余弦定理在解三角形中的应用,考查了计算能力和转化思想,属于中档题.19.直三棱柱中,底面ABC为等腰直角三角形,,,,M是侧棱上一点,设,用空间向量知识解答下列问题.1若,证明:;2若,求直线与平面ABM所成的角的正弦值.【答案】(1)见解析;(2)【解析】【分析】1以A为原点,AB为x轴,AC为y轴,为z轴,建立空间直角坐标系,利用向量的数量积为0即可证明 C. 2当时,求平面ABM的法向量,利用向量法求出直线与平面ABM所成的角的正弦值.【详解】证明: 1直三棱柱中,底面ABC为等腰直角三角形,,,,M是侧棱上一点,设,,以A为原点,AB为x轴,AC为y轴,为z轴,建立空间直角坐标系,0,,2,,0,,2,,2,,2,,, C.2当时,2,,0,,0,,2,,设平面ABM的法向量y,,则,取,得1,,设直线与平面ABM所成的角为,则.直线与平面ABM所成的角的正弦值为.【点睛】本题考查利用向量的方法证明线线垂直,考查向量法解决线面角问题,考查运算求解能力,属于基础题.20.已知椭圆C:过点,,直线l:与椭圆C交于,两点.1求椭圆C的标准方程;2已知点,且A、M、N三点不共线,证明:是锐角.【答案】(1);(2)见解析【解析】【分析】1将题干中两点坐标代入椭圆C的方程,求出a和b的值,即可得出椭圆C的标准方程; 2将直线l的方程与椭圆C的方程联立,列出韦达定理,利用向量数量积的坐标运算并代入韦达定理计算,并结合A、M、N三点不共线,可证明出是锐角.【详解】解: 1将点、的坐标代入椭圆C的方程得,解得,所以,椭圆C的标准方程为;2将直线l的方程与椭圆C的方程联立,消去x并化简得,恒成立,由韦达定理得,.,同理可得所以,由于A、M、N三点不共线,因此,是锐角.【点睛】本题考查直线与椭圆的位置关系的应用,考查向量数量积的坐标运算,属于中档题.21.如图,已知平面ACD,平面ACD,为等边三角形,,F为CD的中点.求证:平面BCE;求二面角的余弦值的大小.【答案】(1)见解析(2).【解析】【分析】(1)设,以,所在的直线分别作为轴、轴,以过点在平面内和垂直的直线作为轴,建立如图所示的坐标系,利用向量法证明,即证平面.(2)利用向量法求二面角的余弦值的大小.【详解】设,以,所在的直线分别作为轴、轴,以过点在平面内和垂直的直线作为轴,建立如图所示的坐标系,,,,,.∵为的中点,∴.(1)证明,,,∴,平面,∴平面.(2)设平面的一个法向量,则,即,不妨令可得.设平面的一个法向量,则,即,令可得.于是,.故二面角的余弦值为.【点睛】(1)本题主要考查空间位置关系的证明,考查二面角的计算,意在考查学生对这些知识的掌握水平和空间想象分析推理能力.(2)二面角的求法方法一:(几何法)找作(定义法、三垂线法、垂面法)证(定义)指求(解三角形).方法二:(向量法)首先求出两个平面的法向量;再代入公式(其中分别是两个平面的法向量,是二面角的平面角.)求解.(注意先通过观察二面角的大小选择“”号)22.已知抛物线E:的焦点为F,是抛物线E上一点,且.1求抛物线E的标准方程;2设点B是抛物线E上异于点A的任意一点,直线AB与直线交于点P,过点P作x轴的垂线交抛物线E于点M,设直线BM的方程为,k,b均为实数,请用k的代数式表示b,并说明直线BM过定点.【答案】(1);(2)见解析【解析】【分析】1利用抛物线的定义与性质求p的值,即可写出抛物线方程; 2设点,,由直线BM的方程和抛物线方程联立,消去y,利用根与系数的关系和A,P,B三点共线,化简整理可得BM的方程,从而求出直线BM所过的定点.【详解】解: 1根据题意知,,①因为,所以,②联立①②解得,;所以抛物线E的标准方程为;2设,;又直线BM的方程为,代入,得;由根与系数的关系,得,;③由轴及点P在直线上,得,则由A,P,B三点共线,得,整理,得;将③代入上式并整理,得,由点B的任意性,得,即,所以;即直线BM恒过定点.【点睛】本题考查抛物线的性质和直线与抛物线的位置关系,以及直线过定点问题,是中档题.。
2019~2020学年度第二学期期中教学质量检测高一物理试卷一、选择题(1-8单选,9-14多选,每题4分,共56分) 1.下列关于重力势能的说法正确的是 ( )A. 物体的位置一旦确定,它的重力势能的大小也随之确定;B. 物体与零势能面的距离越大,它的重力势能也越大;C. 一个物体的重力势能从-5J 变化到-3J ,重力势能增加了;D. 在地面上的物体具有的重力势能一定等于零; 【★答案★】C 【解析】物体的位置确定,但是零重力势能点不确定,它的重力势能的大小也不能确定,选项A 错误;物体在零势能点上方,且与零势能面的距离越大,它的重力势能也越大,选项B 错误;一个物体的重力势能从-5J 变化到-3J ,重力势能增加了,选项C 正确;只有当地面为零势能点时,在地面上的物体具有的重力势能才等于零,选项D 错误;故选C.2.大小相等的力F 按如图所示的四种方式作用在相同的物体上,使物体沿粗糙的水平面移动相同的距离,其中力F 做功最多的是( ) A.B.C.D.【★答案★】A 【解析】【详解】由图知,A 项图中力的方向和位移方向相同,B 项图中力的方向和位移方向夹角为30°,C 项图中力的方向和位移方向夹角为30°,D 项图中力的方向和位移方向夹角为30°;力大小相等、位移相同,据cos W Fx θ=知,A 图中力做功最多.故A 项正确,BCD 三项错误.3.元宵节期间人们燃放起美丽的焰火以庆祝中华民族的传统节日,按照设计,某种型号的装有焰火的礼花弹从专用炮筒中射出后,在4 s 末到达离地面100 m 的最高点时炸开,构成各种美丽的图案。
假设礼花弹从炮筒中竖直向上射出时的初速度是v 0,上升过程中所受的阻力大小始终是自身重力的k 倍,g =10 m/s 2,那么v 0和k 分别等于( )A. 40 m/s ,0.5B. 40 m/s ,0.25C. 50 m/s ,0.25D. 50 m/s ,0.5【★答案★】C 【解析】【详解】利用运动学知识有x =02v v+·t 代入数据得v 0=50 m/s对上升过程中的礼花弹受力分析,由牛顿第二定律有mg +F f =ma又F f =kmg22050m/s 12.5m/s 4v a t ===解得k =0.25故选C 。
人教版2019-2020学年八年级第一学期期末质量检测历史试题(II)卷姓名:________ 班级:________ 成绩:________考试须知:1、请首先按要求在本卷的指定位置填写您的姓名、班级等信息。
2、请仔细阅读各种题目的回答要求,在指定区域内答题,否则不予评分。
一、选择题1 . 120多年来,它以“昌明教育,开启民智”为己任,筚路蓝缕,木铎启路,不仅开创了中国现代出版业,而且在民族教育和文化事业等方面,创新不辍,屡开先河,创造了中国现代出版、教育、学术和文化史上的诸多第一。
“它”指的是A.《申报》B.中华书局C.商务印书馆D.新华书店2 . 正确解读历史图片信息是学习历史的必备技能之一。
对下图的解读符合史实的是A.事件发生在抗战期间B.当时土地改革正在全国开展C.实行减租减息的政策D.激发了农民革命和生产的积极性3 . 1922年7月,中国共产党在上海召开第二次全国代表大会。
该会议召开的重大意义是()A.中国共产党第一次提出彻底的反帝反封建的民主革命纲领B.中国共产党为全国人民指明了前进的道路C.中国共产党开辟了农村包围城市、武装夺取政权的革命道路D.以毛泽东为首的党中央领导集团正式确立4 . 1920年夏,中国第一个共产党早期组织建立在()A.北京B.上海C.长沙D.武昌5 . 下列事件发生的先后顺序是①南昌起义②建立井冈山革命根据地③秋收起义④创建中国工农红军第四军A.①②③④B.①②④③C.①③②④D.③④①②6 . 下列现象共同反映了近代社会某一方面的发展趋势。
这一趋势指的是A.政治民主化B.经济工业化C.生活近代化D.思想自由化7 . 下列图片对应的历史事件所体现的共同主题是A.新民主主义革命的兴起B.近代化的探索C.侵略与反抗D.人民解放战争的胜利8 . 下表反映了1911-1919年我国面粉业生产的状况,出现这种状况的原因是①帝国主义暂时放松对中国的经济侵略②“实业救国”思想的鼓舞③中华民国南京临时政府鼓励工商业发展④中国民族工业实力雄厚A.①②③B.①②④C.①③④D.②③④9 . 中国第一个共产党早期组织的建立者是A.毛泽东B.李大钊C.陈独秀D.董必武10 . 井冈山会师双方代表人物有A.朱德B.陈毅C.毛泽东D.林彪11 . 某件“开天辟地的大事”所确立的奋斗目标是:A.建立平均的理想社会B.立宪法、开国会C.推翻清政府D.实现共产主义12 . 1935年2月,一位作曲家主动要求为电影《风云儿女》的主题歌谱曲,创作了高昂激越、铿锵有力的《义勇军进行曲》。