第十七周周末测试
信丰一中2022-2023学年高二第一学期物理第17周周练试卷与参考答案讲评
信丰一中2022-2023学年高二物理第17周周练试卷命题人：高二物理备课组审题人：高二物理备课组一、单选题（共7小题28分，每小题4分）1．关于简谐运动的回复力，下列说法正确的是（）A ．简谐运动的回复力可能是恒力B ．做简谐运动的物体的加速度方向与位移方向可能相同C ．简谐运动中回复力的公式F kx =-中k 是弹簧的劲度系数，x 是弹簧的长度D ．做简谐运动的物体每次经过平衡位置回复力一定为零2．有两个简谐运动，其表达式分别是14sin(100)cm 3x t ππ=+，25sin(100)cm 6x t ππ=+，下列说法正确的是（）A ．它们的振幅相同B ．它们的周期不相同C ．它们的相位差恒定D ．它们的振动步调一致3．弹簧振子做简谐振动，若从平衡位置O 开始计时，如图，经过0.2s （0.2s 小于振子的四分之一振动周期）时，振子第一次经过P 点，又经过了0.2s ，振子第二次经过P 点，则振子的振动周期为（）A ．0.4sB ．0.8sC ．1.0sD ．1.2s4．如图所示，一个单摆在做简谐运动，关于摆球的运动，下列说法正确的是（）A ．单摆摆动到O 点时，回复力为零，加速度不为零B ．摆球从A 到O 的过程中，机械能增大C ．摆球向右经过O 点和向左经过O 点时，速度相同D ．减小单摆的振幅，单摆的周期会减小5．冰雹（Hai ）也叫“雹”，俗称雹子，是一种天气现象。
若一个100g 的冰雹形成掉落之后由于空气阻力，到达地面的速度相当于冰雹从7层楼高自由落体到地面的速度，落地时与地面碰撞的时间为2ms ，则该冰雹对地面产生的冲击力约为（）A ．500NB ．1000NC ．1500ND ．2000N6．如图所示，质量相等的A 、B 两个球，原来在光滑水平面上沿同一直线相向做匀速直线运动，A 球的速度是6m/s ，B 球的速度是-2m/s ，A 、B 两球发生对心碰撞。
对于该碰撞之后的A 、B 两球的速度可能值，某实验小组的同学们做了很多种猜测，下面的猜测结果一定无法实现的是（）A ．'A 2m/s v =-，'B 6m/s v =B ．'A 2m/s v =，'B 2m/sv =C ．'A 1m/s v =，'B 3m/s v =D ．'A 3m/s v =-，'B 7m/sv =7．最近，我国为“长征九号”研制的大推力新型火箭发动机联试成功，这标志着我国重型运载火箭的研发取得突破性进展。
第17周《西游记》导读及周测第93-100回(含答案)
《西游记》阅读周计划第17周（93-100回）第93回给孤园问古谈因天竺国朝王遇偶1.在禅寺被锁女子的真实身份是__天竺国公__。
2.假公主搭起彩楼，__抛绣球__招亲，故意打中__唐僧_悟空定下了__倚婚降怪__之计。
3.假公主招亲的目的是什么？采取唐僧元阳真气,，以成太乙上仙4.阅读选段,说说各表现了唐僧、悟空、八戒的什么特点A.三藏急还礼,扶起众人,回头埋怨行者道:“你这猴头,又是撮弄我也“绣球儿打在你头上,滚在你袖里,干我何事?埋怨怎么?”三藏道:“似此怎道:“师父,你且放心。
便入朝见驾,我回驿报与八戒、沙僧等候。
若是公主不换了关文就行;如必欲招你,你对国王说,召我徒弟来,我要分付他一声。
’那朝,我其间自能辨别真假。
此是‘倚婚降怪’之计。
”唐僧无已从言,行者转身回驿。
B.八戒听说,跌脚捶胸道:“早知我去好来!都是那沙僧惫懒!——你不阻我啊，我径奔彩楼之下,一绣球打着我老猪,那公主招了我,却不美哉,妙哉!俊刮标致、停当，大家造化耍儿子,何等有趣！”唐僧胆小,没主意。
悟空机智聪明,思维灵活。
八戒美慕富贵,贪恋美色。
第94回四僧宴乐御花园一怪空怀情欲喜1.悟空为何引唐僧前去彩楼?为圆师父慕古之意,为查探给孤园长老所托之事,验明天竺国公主真伪。
2.在本章节中，三个徒弟有没有如愿见到天竺国“公主“真容?为什么？没有见到; 因为“公主”借口徒弟长相丑恶,恐其惊伤弱体,示意国王迅速打发他们出城。
第95回假合真形擒玉兔真阴归正会灵元1.假公主原来是广寒宫里的__玉兔__，使用的兵器短棍实是___捣药杵___。
2.如何评价下面两人的做法？（1）正此观看处，猪八戒动了欲心，忍不住，跳在空中，把霓裳仙子抱住道：“姐姐，我与你是旧相识，我和你耍子儿去也”。
（2）行者道：“他这山，名为白脚山。
进来说有蜈蚣成精，黑夜伤人，往来行旅，甚为不便。
我思蜈蚣惟鸡可以降服，可选绝大雄鸡千只，撒放山中，除此毒虫。
就将此山名改换改换，赐文一道敕（chi）封，就当谢此僧存养公主之恩也”。
河北省保定市高阳中学2013-2014学年高一下学期第十七次周练生物试题 Word版含答案
高一下学期第十七次周练生物试题一、选择题：1．下列生物中，没有细胞结构的是A.“非典”病原体B.“结核”病原体C.草履虫D.蘑菇2．生物体生长、发育、繁殖和遗传的基础；生物体生命活动的物质基础；生物体进行一切生命活动的基础，分别是A.遗传和变异；蛋白质和核酸；新陈代谢B.细胞增殖；组成生物体的各种化学元素和化合物；新陈代谢C.新陈代谢；细胞增殖；组成生物体的各种化学元素和化合物D.新陈代谢；蛋白质和核酸；遗传和变异3．医院确认糖尿病的常用方法及结果是A.加入新制的Cu(OH)2 ，出现砖红色B.加入碘——碘化钾溶液，出现蓝色C.加入苏丹Ⅲ染液，出现橘黄色D.加入双缩脲试剂，出现紫色4．一个由n条肽链组成的蛋白质分子共有m个氨基酸，该蛋白质分子完全水解共需要水分子A.n个B.m个C.(m＋n)个D.(m－n)个5．酶是由活细胞产生的。
下列关于酶的论述中，都正确的一组是①酶是一类具有生物催化作用的蛋白质②酶的活性与PH有关③酶的催化效率很高④酶的数量因参与化学反应而减少⑤只要条件适宜，酶在生物体外也可催化相应的化学反应⑥温度过高和偏低对酶活性影响的原理相同A.②③⑤B.①④⑥C.①②③D.②③⑥6．下列关于细胞分裂、分化、衰老和死亡的叙述，正确的是A.个体发育过程中，细胞的分裂、分化、和死亡对于生物体都是有积极意义的B.细胞分裂存在于个体发育整个生命过程中，细胞分化仅发生于胚胎发育阶段C.细胞分化使各种细胞的遗传物质有所差异，导致细胞的形态和功能各不相同D.多细胞生物细胞的衰老与机体的衰老总是同步进行的7．下列关于细胞主要化学成分的叙述中，不．正确的是A.动物乳汁中的乳糖和植物细胞中的纤维素都属于多糖B.胆固醇、性激素、维生素D都属于脂质C.脱氧核糖核酸是染色体的主要成分之一D.蛋白质的多样性与氨基酸的种类、数目和排列顺序等有关8．下列说法中，均正确的一组是①生物的基本特征之一是具有细胞结构②除病菌以外，生物体结构和功能的基本单位是细胞③生物体的生长是细胞的分裂、分化和生长的结果④所有现在生存着的生物，它们的形态结构和生活习性都是与环境大体上相适应的，不然就要被环境所淘汰⑤如果没有应激性，生物就不可能适应周围的环境⑥生物能够保证种族的延续，其原因是生物体都有遗传和变异的特性A.②④⑥B.③④⑤C.①②④D.②③⑤9．谷氨酸的R基为—C3H5O2，1分子谷氨酸含有的C、H、O、N原子数依次是A.5、9、4、1B.4、8、5、1C.5、8、4、1D.4、9、4、110．用光学显微镜观察发生质壁分离现象的洋葱表皮细胞，不能检视到染色体的原因是A.没有用龙胆紫染色B.试剂破坏了染色体结构C.无染色体形成D.显微镜倍率不够12．一种雄性极乐鸟在繁殖季节里，长出蓬松而分披的长饰羽，决定这种性状的出现是由于生物体具有A.应激性B.适应一定的环境C.生殖作用D.遗传的特性13．细胞内有机物的合成离不开各种细胞器。
二年级第十七周错题汇总
第十七周周末乐园错题汇总一、填空题。
’1、在○里填上“>”“<”或“=”。
4米○40厘米 1米○45厘米+55厘米2米○85米-23米 70厘米○1米3米○30厘米 1米-50厘米○50厘米2、将下面的长度按从长到短的顺序排一排。
30厘米 10米 70 厘米 7米 3米99厘米 4米（）>（）>（）>（）>（）>（）3、16名同学排成一排。
从左数小红是第5个，从右数小明是第8个。
小红和小明之间有（）名同学。
4、4名运动员，每两人握一次手，一共要握（）次手。
5、把一根绳子对折，再对折，沿折痕剪开，每段绳子刚好长5厘米，这根绳子原来长（）厘米。
6、一条红色彩带长48厘米，它剪去12厘米后，与一条绿色彩带同样长。
原来这条红色彩带比这条绿色彩带长（）厘米。
二、解决问题1、商店有48个玩具，上午卖掉16个，下午卖掉17个。
现在比原来少了多少个？2、男生折了37只千纸鹤，女生折了48只干纸鹤，送给幼儿园一些后还剩下26只。
他们送给幼儿园多少只？3、美术组有36人，航模组有18人，美术组调多少人到航模组，两组人数就一样多了？4、把一根竹竿竖直插入水中，水面以上的部分长69厘米，水面以下的部分长31厘米。
这根竹竿长多少米?5、一间教室的长为8米，王老师沿着这间教室的长走了4个来回，他一共走了多少米？6、有一把断了的米尺，这把米尺上最小的刻度是36厘米，最大的刻度是90厘米，这把米尺一次最长可以量出多少厘米的长度？7、小红有一根铁丝，她用这根铁丝围了一个每条边的长都为8厘米的五边形后，这根铁丝还剩下12厘米，这根铁丝原来长多少厘米？8、小明家、小东家和学校在同一条笔直的道路的同一边，小明家离学校56米，小东家离学校38米，小明家和小东家相距多少米？9、把30米的绳子剪成相同的几段，一共剪了5下，每段长多少米？10、把一根绳对折两次后每段长6米，这根绳原来长多少米？如果把这根绳对折三次，那么每段长多少米？。
山东省淄博市六中2021-2022学年高二上学期第17周周末自主学习材料英语试题 Word版含答案
2022级高二英语自主学习材料文理通用第17周命题人：冯祚新任教班级：25班审核人：隽丕东任教班级： 7、8班姓名：班级：第一部分：阅读理解（共2节，满分70分）第一节(共30小题;每小题2分，满分60分)AProfessor Martin’s report says that children who attend a number of different schools, because their parents have to move around the country, probably make slow progress in their studies. There are also signs, says Professor Martin, that an unusually large number of such children are mentally affected.The Profes sor says, “It’s true, my personal feeling is that children should stay in one school. However, our findings are based on research and not on any personal feelings that I or my assistants may have on the subject.”Captain Thomas James, an Army lecturer for the past 20 years and himself a father of 2 children, said, “I’ve never heard such rubbish. Taking me for example, no harm is done to the education of my children who change school regularly---if they keep to the same system. In my experience----and I’ve known quite a few of them---- Army children are as well-adjusted(调整) as any others, if not more so. What the professor doesn’t appear to notice is the fact that in such situations children will adapt much better than grown-ups.”When this was put to Professor Martin, he said that at no time had his team suggested that all such children were mentally affected in some way, but simply that in their experience there was a clear tendency (倾向). “Our finding shows that while the very bright child can deal with regular change without harming his or her general progress in studies, the majority of children suffer from constantly having to enter a new learning situation.”1. Professor Martin’s report suggests that _______.A. it may not be good for children to change schools oftenB. parents should not move oftenC. more and more children are mentally affectedD. children will make rapid progress if they stay in one school.2. According to the passage, Professor Martin’s personal feeling____ .A. is the opposite of what his report has shownB. is in a way supported by his researchC. has played a big part in his researchD. is based on his own experience as a child3. From the passage, we can conclude that Captain Thomas’ children____.A. have been affected by changing schoolsB. have not been affected by changing schoolsC. like every army school they have been inD. are the brightest among the children who often change school4. According to Professor Martin, ____ suffer from changing schools regularly.A. non-army childrenB. bright childrenC. the majority of childrenD. few children5. Captain Thomas believes _____A. army children are generally better—adjusted than any othersB. army children are usually less experienced than any othersC. children can adapt more easily and quickly than grown-upsD. children can adapt as easily and quickly as grown-upsBDuring the 20th century there has been a great change in the lives of women. A woman marrying at the end of the 19th century probably have been in her middle 20’s and would be likely to have seven or eight children. By the time the youngest was 15, the mot her would have been in her early 50’s and would expect to live a further 20 years, during which chance and health made it hard for her to get paid work. Today women marry younger and have fewer children.Usually a woman’s youngest child will be 15 when sh e is 45 and she can be expected to live another 35years and is likely to get paid work until 60.This important change in women’s life has only recently begun to have its full effect on women’s economic position. Even a few years ago most girls left school and took a fulltime job. However, when they married they usually left work at once and never returned to it. Today the school-leaving age is 16, many girls stay at school after that age, and though women marry younger, more married women stay at work at least until shortly before their first child is born. Very many more return to work later. Such changes have led to a new relationship in marriage, with the husband accepting a greater share of the duties of family life.6. We learn from this passage that in the 19th century_____ .A. there were more children in the world than there are todayB. women spent a greater part of their lives raising children than they do todayC. there were more women in poor health than there are todayD. women married younger than they do today7. One reason why a married woman of today may take a job is that ____.A. she is usually younger when her children are old enough to look after themselvesB. she is obliged to help her husband support the familyC. she feels lonely at home when her children grow upD. she hopes to change the world a bit by doing up8. Many girls are now likely to ____.A. give up their jobs after they get marriedB. leave school as soon as they canC. marry early so that they can get better jobsD. continue working until they are going to have a baby9. According to the passage, it is now quite usual for women to ____ .A. stay at home after leaving schoolB. find jobs when they reach the age of 16C. start working again later in lifeD. marry and have children while still at school10. Now a husband probably ____ .A. plays a greater part in looking after the childrenB. does almost all of the houseworkC. feels unhappy about his wife’s going out to workD. takes a part-time job so as to help at homeCIn 1896, Einstein went to Zurich to study physics. There he met a girl from Hungary. They studied in the same class and the same interest in physics brought them together and they became good friends. Before long they fell in love. In 1903 when Einstein was 24, he married Marits, who was 4 years older than he.After their marriage, Einstein devoted himself to the research of the great theory. To give her husband more help, Marits gave up her own work, and became a good wife and assistant. She tried her best to encourage him whenever possible. She was sure that her husband would succeed. They often discussed the theory while walking outside or sitting together in the room. They even did that in their letters when one of them was away from their home.In1914, Einstein moved to Berlin and settled down there. At that time his theory proved to be correct and he had become famous all over the world. But it was not long before the First Would War broke out. Marits as well as her two sons, who was on holiday in Switzerland, couldn’t come back to Berlin any more. The war not only stopped Einstein’s work but also broke up the warm, happy family. In 1919, Einstein and Marits had to get divorced(离婚).11. Form this passage we can see that Marits was born in _____.A.1896B. 1879C. 1883D.187512. We can learn from the passage that Marits ______.A. greatly helped Einstein with his research workB. supported Einstein but helped him littleC. was also a great scientistD. was the real discoverer of the theory13. The last paragraph mainly tells us _____.A. why Einstein and Marits got divorcedB. why Einstein moved to BerlinC. how Einstein became famous all over the worldD. when the First World War broke out14. Why did Einstein and Marits get divorced?A. Because Marits didn’t love Einstein after the war broke out.B. Because the war stopped Marits from coming back to Berlin.C. Because Einstein only cared about his research.D. Because Einstein was famous all over the world.15. The writer wanted to tell us that _____.A. Marits should be respected as greatly as her husbandB. Einstein suffered a great deal in his lifeC. The bitter (苦难的) suffering was the mother of successD. We should remember Marits when talking about Einstein’ theoryDAfter giving a talk at a high school, I was asked to pay a visit to a special student. An illness had kept the boy home, but he had expressed an interest in meeting me, and it would mean a great deal to him. I agreed.During the nine-mile drive to his home, I found out something about Matthew. He had muscular dystrophy（肌肉萎缩症）. When he was born, the doctor told his parents that he would not live to see five, and then they were told he would not make it to ten. Now he was thirteen. He wanted to meet me because I was a gold-medal power lifter, and I knew about overcoming obstacles (障碍) and going for my dreams.I spent over an hour talking to Matthew. Never once did he complain or ask, “Why me?” He spoke about winning and succeeding and going for his dreams. Obviously, he knew what he was talking about. He didn’t mention that his classmates had made fun of him because he was different. He just talked about his hopes for the future, and how one day he wanted to lift weight with me.When we finished talking, I went to my briefcase and pulled out the first gold medal I won and put it around his neck. I told him he was more of a winner and knew more about success and overcoming obstacles than I ever would. He looked at it for a moment, then took it off and handed it back to me. He said, “You are a champion. You earned that medal. Someday when I get to the Olympics and win my own medal, I will show it to you.”Last summer I received a letter from Matthew’s parents telling me that Matthew had passed away. They wanted me to have a letter he had written to me a few days before:Dear Rick,My mom said I should send you a thank-you letter for the picture you sent me. I also want to let you know that th e doctors tell me that I don’t have long to live anymore. But I still smile as much as I can. I told you someday I was going to the Olympics and win a gold medal. But I know now I will never get to do that. But I know I’m a champion, and God knows that too. When I get to Heaven, God will give me my medal and when you get there, I will show it to you. Thank you for loving me.Your friend,Mathew16. The boy wanted to meet the author because ______.A. he was interested in what the author was doingB. he wanted to get a gold medal himselfC. he admired the author very muchD. he wanted the author to know him too17. The underlined part in the third paragraph probably means “______”.A. Why do you come to see me?B. Why do I have to stay at home?C. Why does the disease fall on me?D. Why not give a gold medal to me?18. We can infer from the passage that ______.A. Matthew was a determined boy and considered himself as normalB. Rick used to have the same disease and later became a power lifterC. Matthew was to become a champion before he diedD. After meeting Matthew, Rick regarded him as normal19. The boy refused the author’s medal because ______.A. he wanted the picture insteadB. he would not be pitied by othersC. he did not know he would die soonD. he himself could earn one in the future20. The author wrote the passage with the purpose of ______.A. describing his unusual friendship with a disabled childB. showing his admiration towards the disabled childC. telling an experience of meeting a disabled childD. expressing his pity to all the disabled childrenENo one knows why we sleep, but it's certain that we need to. People who are prevented from sleeping begin to suffer obvious effects after a few days--they think less clearly, and they fall asleep during the working hours; some may have hallucinations(幻觉).There are no rules about sleep. Generally speaking, grown-ups sleep about 7 and a half hours each night and probably more than 60 percent get between seven and eight hours. But perhaps eight per cent are quite happy with 5 hours or less, and 4 per cent or so find that they want ten hours or more. If you feel all right, you're probably getting enough sleep. The important thing is not to worry how much other people get.Their needs may be different. Exercise doesn't seem to increase the need for sleep--office workers, for example, sleep for about as long as people doing physically active work.Children sleep more than grown-ups--perhaps 14 to 18 hours soon after birth, going down to grown-up levels by early teen-age. Sleep patterns also tend(倾向) to be different in the elderly, who may sleepless at night than they did when younger, find sleep getting more broken, and often make it a rule to sleep during the daytime.21. According to the passage, some people are unable to think clearly because ________.A. they have hallucinationsB. they feel sleepy during the working hoursC. they don't have enough sleepD. they are certain to be kept from going to bed22. Which of the following is true?A. All grown-ups must have at least eight-hour sleep.B. Most of grown-ups sleep for seven or eight hours.C. Quite a few people need only 5 hours or less for them to sleep.D. No grown-ups sleep more than ten hours.23. Whether you have got enough sleep is judged by ________.A. how many hours you have sleptB. how many hours you need to sleepC. whether you do exercise and physical workD. whether you feel fresh and energetic24. According to the passage, a boy of 14 years old sleeps ________.A. as long hours as a grown-upB. much longer hours than a grown-upC. for 14 hours each nightD. for less than 8 hours per night25. Who finds they sleep less during the night and must take a nap during the day?A. ChildrenB. Grown-upsC. Young peopleD. Old peopleFBill Javis took over our village news-agency at a time of life when most of us only want to relax. He just thought he would like something but not too much to do, and the news-agency was ready-made. The business produced little enough for him, but Bill was a man who only wanted the simplicity and order and regularity of the job. He had been a long-serving sailor, and all his life had done everything by the clock.Every day he opened his shop at six a. m. to catch the early trade; the papers arrived on his door-step before that. Many of Bill’s customers were city workers, and the shop was convenient for the station. Business was tailing off by 10 o’clock, so at eleven sharp Bill closed for lunch. It was hard luck on anybody who wanted a paper or magazine in the afternoon, for most likely Bill would be down on the river bank, fishing, and his nearest competitor was five kilometers away. Sometime in the afternoon, the evening paper landed on the doormat, and at 4 o’clock Bill reopened. The evening rush lasted t ill seven, and it was worthwhile.He lived in a flat above the shop, alone. Except in the very bad weather, you always knew where to find him in the afternoon, as I have said. Once, on a sunny afternoon, I walked home along the river bank from a shopping trip to the village. By my watch it was three minutes past four, so I was astonished to see Bill sitting there on his little chair with a line in the water. He had had no luck, I could see, but he was making no effort to move.“What’s wrong, Bill?” I call ed out from the path.For answer, he put a hand in his jacket and took out a big, golden object. For a moment I had no idea what it could be, and then it suddenly went off with a noise like a fire engine. Stopping the bell, Bill held the thing up and call ed back, “Ten to four, you see, and this is dead right.”I had never known anyone carrying a brass alarm clock round with him before.26. Bill Javis became a news-agent when ______.A. he needed the moneyB. he decided to take things easyC. he was quite an old manD. he gave up clock-repairing27. Bill opened the shop so early in the day because ______.A. he liked to do as much as possible before he went to workB. the shop had to be open when the morning papers cameC. he was never sure of the timeD. it was then that he did a lot of business28. You might say “Hard luck” to someone who ______.A. has just heard some very good newsB. is less fortunate than he or she ought to beC. puts great effort into whatever he or she triesD. fails through his or her own fault entirely29. On that sunny afternoon, the writer was surprised when he saw Bill because ______.A. he thought it was late for Bill to be still fishingB. he thought Bill was ill, since he was not moving at allC. Bill had not caught anything, and that seemed strangeD. Bill stayed in his flat30. From the information given in the passage, who or what do you think was wrong?A. The bell was; it must have gone off at the wrong time.B. Bill was; he had dropped off to sleep.C. The writer’s watch was fast.D. Bill’s clock was wrong; it was very old.其次节(共5小题;每小题2分，满分10分)依据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
17周练
第十七周周末练习（总分：120分，练习时间：100分钟）一、填空。
（1′×26＝26′） 1．3÷8=（ ）：40=20：（ ）=()27=（ ）%=()++893。
2．3.06升＝（ ）升（ ）毫升 1040立方分米＝（ ）立方米 35分钟＝（ ）小时 10.02公顷=（ ）平方米3．甲乙两正方体棱长的比是4：3，它们的表面积之比是（ ），体积比是（ ）。
4．糖水的重量是糖的20倍，糖的重量占水的)()( ，水比糖水少)()( 。
5．一个正方体表面积96平方厘米，把它平均切成8个同样的小正方体后，表面积增加了（ ）平方厘米，每个小正方体的体积是（ ）立方厘米。
6．甲数的43等于乙数的21，甲、乙二数的最简比为（ ），比值是（ ）。
7．一根绳子长10米，剪去52后，又接上52米，现在绳子比原来短（ ）米。
8．x ÷y=75……39，y 取最小值时，x 是（ ）。
9．一个等腰三角形，其中两内角的度数比是2：5，此三角形的顶角是（ 或 ）度。
10．在一个盒子里有8个红球，4个绿球和一些白球，每次从里面取出一个球，然后放回，结果取出白球的可能性是31，盒子里有（ ）个白球。
11.小东家新买了一辆家用小轿车，其油箱可装油40升，小轿车行驶后，油箱中的油量与行驶的时间关系如右图。
那么一箱油够连续行驶（ ）小时。
12．鸡和兔共有10只，数一数腿有22条，鸡有（ ）只，兔有（ ）只。
13.在2个同样的大盒和5个同样的小盒里装满球，正好是100个。
每个大盒比每个小盒多装8个，每个大盒装（ ）个，每个小盒装（ ）个。
14.有两堆煤，一堆比另一堆重80吨，把它们都运走51后，现在两堆相差（ ）吨。
二、判断。
（1′×5＝5′）1．两个真分数相除，商一定不小于被除数。
………………………………（ ） 2．如果a ÷54＝b ×54（a ≠0，b ≠0）则a ＜b ……………………………（ ）114．7吨的81与1吨的87与3.5吨的41都相等。
高考英语一轮复习 周末培优(第17周)七选五(含解析)新人教版-新人教版高三全册英语试题
七选五〔测试时间：40分钟，总分：60分〕班级：____________ 姓名：____________ 座号：____________ 得分：____________I.单项填空(每一小题1分，共10分)从A、B、C、D四个选项中，选出可以填入空白处的最优选项。
1.—Where is Peter? I can’t find him anywhere.—He went to the library after breakfast and__________his essay there ever since.A.wroteB.had writtenC.has been writingD.is writing【答案】C【易错点拨】解答此题的关键是要抓住时间状语ever since，否如此会想当然地认为空处应和and 前面的went to the library的时态保持一致，误选一般过去时。
2.A common memory they all have__________ their school days is the school uniform.A.ofB.onC.toD.with【答案】A【解析】考查介词的用法。
句意：他们对校园岁月的共同记忆就是校服。
本句使用了have a memory of 这一搭配，含义为"对……有记忆"。
3.Many of the things we now benefit from would not be around __________Thomas Edison.A.thanks toB.regardless ofC.aside fromD.but for【答案】D【解析】考查介词短语辨析。
句意：要不是因为托马斯·爱迪生，很多现在让我们受益的东西都不会出现。
but for "要不是，倘假设没有"，符合句意。
4.It might have saved me some trouble __________the schedule.A.did I knowB.have I knownC.do I knowD.had I known【答案】D【解析】考查虚拟语气的倒装。
第17周周末练习
第十七周练习题班级_______ 姓名_________学号_________得分______一、填空1、一个九位数最高位是最小的质数，百万位上是最小的合数，千位上是最大的一位数，百位上是最小的一位数，其余各位上都是零，这个数写作（ ），四舍五入到万位约是（ ）。
2、[x ]表示取数x 的整数部分，比如[6.28]＝6，若x ＝9.42，则[x ]＋[2x ]＋[3x ]＝（ ）。
3、()25＝36÷（ ）＝（ ）︰1.5＝（ ）﹪＝1.2 4、a ＝b ＋2（a ，b 都是非零自然数），则a 和b 的最大公因数可能是（ ），也可能是（ ）。
5、一根长5米的铁丝，平均分成6段，每段占全长的（ ），每段长（ ）米。
6、算式中的□和△各代表一个数，已知：（△＋□）×0.3＝4.2，□︰0.4＝12。
那么，△＝（ ），□＝（ ）。
7、同一个圆中，周长与半径的比是（ ），直径与半径的比值是（ ）。
8、A 、B 是前100个自然数中的两个，（A ＋B ）︰（A －B ）的商最大是（ ）。
9、有一个正方体土坑，向下再挖深2米，它的表面积就增加64平方米，成为一个长方体土坑。
这个长方体土坑的容积是（ ）立方米。
10、在推导圆的面积公式时，将圆等分成若干份，拼成一个近似的长方形，已知长方形的长比宽多6.42厘米，圆的面积是（ ）平方厘米。
11、甲、乙两数相差10，各自减少10﹪后，剩下的两数相差（ ）。
12、一个最简分数2713的分母减去一个数，分子加上同一个数，所得的新分数可以约简为53，这个数是（ ）。
13、把一条绳子分别等分拆成5股和6股，如果拆成5股比拆成6股长20厘米，那么这根绳子的长度是（ ）米。
14、将不同的自然数填入右下图的圆圈中，使两个箭头指的每一个数等于箭头始端的数的和，最顶端那个圆圈中的数最小是（ ）。
二、精挑细选比细心1、将厚0.1毫米的一张纸对折，再对折，这样折4次，这张纸厚（ ）毫米。
2023年秋八上语文第17周周练：期末复习——记叙文阅读测试卷(含答案)
第17周周测卷：期末专题复习——记叙文阅读测试卷满分：120分注意事项：1.答卷前，一定要保持稳定呼吸，不要焦躁，要自信，相信自己能找到答案！2.拿到试卷后，考生务必将自己的姓名、准考证号填写在试卷上。
3.不要舍不得放弃，一道题无思路做不出来，你在那里耗时间，就是在减少试卷分数！4.越狂躁，越容易粗心，和答案失之交臂!一、（16分）（2023·四川成都·八年级统考期末）阅读下面的文章，完成下面小题。
家里的老水缸吴新星①我家有两只缸。
一只黄褐色，外面上了釉，摸起来非常光滑，缸口外壁还有一圈草绳纹，这只缸放在天井里。
还有一只是灰青色的，与灶台为邻，一家人的平常日子就从这里开始。
②父亲常说，水缸里不能缺水，缺了水的日子就像长在墙头上的草，撑不了几天就会蔫头巴脑。
③水缸不会说话，但水缸里的水就是水缸的心思，清澈明亮，像极了水缸边淳朴勤劳的父母。
每天早上，父亲用瘦削的肩膀从远在几里外的村头挑回一担担井水，哗啦啦地倒入缸内。
母亲从地里忙完，又忙着生火点燃灶膛，从水缸里取水烧饭。
只要水缸里有水，灶腔里的火就不会熄。
即使粗茶淡饭，也是世间至真至淳的美味。
母亲怕缸里落了灰，平常总是把一块半月形的木板搁在上面，又一再叮嘱我们要爱惜缸里的水，这朴实的话里蕴含着的传统美德，影响了我们的一生。
那只放在天井里的缸呢，相形之下，我们就跟它亲近多了。
④即便是空空的一只放在天井里，在那个贫瘠的年代对于我们也是一件特别的玩具。
我们踮起脚尖，俯身向缸内喊上一声，缸内嗡嗡作响，恍若空谷回音。
下雨了，雨水自檐间下来，经过一个长长的锡皮管，落在承接的缸中。
雨水时而淅沥时而哗哗。
雨停了，水缸满满地注着透亮的水，像______。
我喜欢把头探到缸面上，痴痴地看个半天，和缸水又像大眼瞪小眼。
其实缸里没什么东西，只是清水。
可也有趣呀，可以看到微凸的缸底、褐色的缸壁和水里的折光。
⑤寒冬腊月，水缸表面结了一层厚厚的冰，小孩子们蜂拥而至，围住水缸，伸出两个手指在冰面上“走”，滑溜溜的。
外研版七年级英语下第十七周测试卷
七年级下册英语第17周周测测验卷（考试时间：50分钟：满分100分）班别_______ 姓名_________ 学号___________分数___________听力部分(20%)第一节听力理解（共15题，每小题1分）听第一段对话，回答第1----2题（）1. What are they talking about?A. A bookB. A KiteC. A knife（）2. How much is the kite?A. 13 yuanB. 33 yuanC. 30 yuan听第二段对话，回答第3---4题（）3. Where do they want to go this Sunday?A. To a shopB. To a parkC. To a zoo（）4. What do they want to see first?A. TigersB. MondaysC. Elephants听第三段对话，回答第5----6题（）5. Who is from England?A. MaryB. LucyC. Rose（）6. Who are in the same class?A. Mary and LucyB. Rose and MaryC. Rose and Lucy听第四段对话，回答第7---8题（）7. What animals are Jim’s favourite?A. CatsB. DogsC. Monkeys（）8. What is Wanwan?A. A boyB. A friendC. A dog听第五段对话，回答第9--11题（）9. How many classes are there in the school?A. 8B. 11C. 19（）10. Is the school big or small?A. BigB. SmallC. We don’t know（）11. Which grade is Beibei in?A. Grade OneB. Grade TwoC. Grade Three听一段独白，根据独白内容完成第12---15题（）12. What can kangaroos do?A. RunB. WalkC. Jump（）13.How long does a baby kangaroo stay in its mother’s?A. Six monthsB. Six weeksC. Six days（）14. What can a young kangaroo do after eight months?A. SeeB. WalkC. hop(跳)（）15.Where are kangaroos from?A. ChinaB. AmericaC. Australia第二节听取信息（本题共5小题，每小题1分）笔试部分(80%)一、用英语写出下列单词和词组。
第17周周末作业
龙城初中初一年级第十七周数学周末作业班级： 姓名： 座号： 分数：一.选一选，慧眼识金（本大题共12个小题，每小题3分，共36分）1. 下列交通标志图案是轴对称图形的是（ ）A. B ． C ． D ．2. 下列运算正确的是( )A.3a-(2a-b)=a-bB.(a 3b 2-2a 2b)÷ab=a 2b-2C.(a+2b)(a-2b)=a 2-2b 2D. (-12a 2b)3=-18a 6b 33. 从标号分别为1，2，3，4，5的5张卡片中，随机抽取1张.下列事件中，必然事件是( )A.标号小于6B.标号大于6C.标号是奇数D.标号是3 4. 如果直角三角形的一个锐角是另一个锐角的4倍，那么这个直角三角形中一个锐角的度数是（ ）A 9°B 18°C 27°D 36°5. 若2-)23-(=a ，1-)1-(=b ，0)2π-(=c ，则 a.b.c 的大小关系是（ ）A.a ＞b ＞cB.a ＞c ＞bC.c ＞a ＞bD.c ＞b ＞a6. 如图，将一副三角板叠放在一起，使直角的顶点重合于O ， 则∠AOC+∠DOB=（ ）A.900B.1200C.1600 D.18007.下列条件中能判定△ABC ≌△DEF 的是()A ．AB ＝DE ，BC＝EF ，∠A ＝∠D B ．∠A ＝∠D ，∠B ＝∠E ，∠C ＝∠F C ．AC ＝DF ，∠B ＝∠F ，AB ＝DE D ．∠B ＝∠E ，∠C ＝∠F ，AC ＝DF 8.如图，AB ∥CD ，CE ∥BF ，A ，E ，F ，D 在一条直线上， BC 与AD 交于点O 且OE=OF ，则图中有全等三角形的对数为( ) A.2B.3C.4D.59. 如图，已知AB//CD ，CE.AE 分别平分 ∠ACD 、∠CAB ，则∠1+∠2=（ ） A. 45 B. 90 C. 60 D. 7510. 如图，在△ABC 中，AB=AC ，且D 在BC 上，DE ⊥AB 于E ， DF ⊥BC 交AC 于点F ，若∠EDF ＝70°, 则∠AFD 的度数是（ ） A . 160° B. 150° C. 140° D. 120°11.一学员在广场上练习驾驶汽车，两次拐弯后，行驶方向与原来的方向相同，这两次拐弯的角度可能是（ ） A. 第一次向右拐50°，第二次向左拐130° B. 第一次向左拐30°，第二次向右拐30° C. 第一次向右拐50°，第二次向右拐130° D. 第一次向左拐50°，第二次向左拐130°12. 如图，AD 是△ABC 的角平分线，DF⊥AB，垂足为F ， DE=DG ，△ADG 和△ AED 的面积分别为50和39， 则△EDF 的面积为（ ）A ．11B ．5.5C ．7D ．3.5二.填一填，画龙点睛（本大题共4个小题，每小题3分，共12分）13. 如图所示，在△ABC 中，∠B =90°，∠C =35°，将 △ABC 折叠，使点C 与点A 重合，折痕为DE ，则 ∠BAE 的度数为 ．14.如果x 2+2(k-3)x+25是一个用完全平方公式得到的结果, 则k 的值是 .15. 定义：如果一个数的平方等于–1，记为i 2=–1,这个数i 叫做虚数单位．那么,1i i =12-=i ，i i -=3，1,,1654-===i i i i ，…那么=2011i ． 16. 已知：直线l 1∥l 2，一块含30°角的直角三角板如图 所示放置，∠1＝25°，则∠2等于 三.做一做，体验成功17.计算（每小题4分，共8分）（2）)6(3)2(3322b a ab b a -÷∙- （1）解：原式= 解：原式=)3)(2(2)4)(32(-+--+x x x x18. （5分）先化简，再求值：2(32)(32)5(1)(21)x x x x x +-----，其中13x =-解：19. （6分）如图，已知：BC AD ⊥于D ，BC EG ⊥于G ，1∠=∠E 。
人教版七年级英语上册每日一练 第十七周周一周二
人教版七年级英语上册每日一练第十七周周一(December the eighteenth)练习题Name __________ Class __________ Scores __________一、根据所给的中文提示完成单词（20分）(1). Four pairs of socks are only three (美元)_______.(2). Yellow (毛衣)_______ are only forty Yuan this weekend.(3). This skirt (看上去)_______ beautiful on me. I will take it.(4). Tom (有)_______ two soccer balls in his room.(5). Mary’s mother bought a bag of (草莓)_______ last Sunday.二、单项选择（60分）( )1. －Is ______ book in your room? －Yes, ______ is.A. your, itB. your, heC. , her, sheD. you, it( )2. －What ______ does Tom like? －He likes tomatoes.A. colorsB. vegetablesC. fruitD. sports( )3. I’m Daniel Black. Daniel is my ______.A. last nameB. family nameC. first nameD. middle name( )4. That pair of socks ______ too short for me.A. amB. beC. areD. is( )5. Gina, pass two ______ to me, please.A. knifeB. knifesC. knivesD. knives’( )6. My parents ______ a tennis ball.A. hasB. don’t haveC. doesn’t haveD. not have( )7. David found ______computer but ______was lost.A. his, myB. his, mineC. he, myD. him, mine( )8. That ______is my sister. She is nine years old.A. girlB. womanC. babyD. boy( )9. Look, there is a tennis ball ______the table ______the floor.A. in, onB. on, onC. under, inD. under, on( )10. l like ping-pong. It’s easy ______me.A. withB. onC. forD. to三、阅读填词（20分）My (1)_______ is Li Ming. I was born(出生) in 2003, so I’m (2)_______ years old this year. I study in Class Eleven (3)_______ Seven at Sunshine Middle School. I have short black hair and I am a little thin. I am a little nearsighted(近视的), so I weara pair of (4)_______ every day. I’m good at singing. Jay Chow is my favorite(5)_______. He sings very well. He’s my hero.My school is big and beautiful. Our (6)_______ are clean and bright. I go to school (7)_______ foot every day. I study hard at school. My favorite (8)_______ is English because our English classes are very interesting. I often play basketball in my free(空闲的) time. Yi Jianlian is my favorite basketball player. My (9)c_______ are all friendly to me. We often help each other with study and we often play sports together. I love my school life(生活) very (10)_______.人教版七年级英语上册每日一练第十七周周二(December the nineteenth)练习题Name __________ Class __________ Scores __________ 一、单项选择（60分）( )1. —What month comes after March? —It's _______.A. AprilB. JulyC. MayD. February( )2. —What _______your father _______?—Chicken.A. do, likeB. is, likesC. are, likeD. does, like( )3. —Happy birthday, Tom! —_______.A. Great!B. Thank you!C. It’s Ok.D. The same to you ( )4. Her birthday is _______February 3rd.A. inB. onC. atD. for( )5. — When do you have P.E. ? —We have it _____Monday and Friday.A. inB. onC. atD. for( )6. Lucy is ______ American girl. She plays ______ violin very well.A. a; theB. a; /C. an; theD. an; /( )7. Mr. Wu is a teacher. _______teaches us English.A. HeB. SheC. ItD. You( )8. My mother _______dinner now.A. is cookingB. doesC. cooksD. cook( )9. My birthday party is ____six ____Sunday evening at my house.A. in, onB. at, inC. on, onD. at, on( )10. —Where are you now? —I ____ to my friend Jack on the street.A. am talkingB. talkC. to talkD. talks二、根据所给的词或中文完成句子（40分）1. Your ________(堂兄弟) aren’t happy. What’s the matter?2. One of the kids often _______ (去) swimming on weekends.3. Susan, _______ (look) left first before you cross the road.4. Jim, like his grandparents, _______ (know) a lot about the earth.5. Look, some students ________ (跳舞) on the playground.6. Kevin loves basketball. He often_______ (play) it after school.7. When does your brother _______ (do) his homework every day?8. Sam wants ________ (play) soccer every weekend.9. Tom’s grandfather often ________ (买) a newspaper every day.10. ________ (有) some milk and coffee on the table.。
九年级英语第十七周周末练习题 试题
轧东卡州北占业市传业学校九年级英语第十七周周末练习家长签名：完成时间：80分钟班级：成绩：一、单项选择〔共20分，每题1分〕。
〔〕1._______the talk on history is rather boring, ________they still listen carefully.A. Although, butB. /, yetC. Though, /D. Because, so〔〕2. There is _____little food and _____many people that many people died from hunger.A. so, suchB. such, soC. so, soD. such, such〔〕3. I’m afraid we will have to call the police if you ____ breaki ng into the car.A. give upB. look forC. base onD. insist on〔〕4. Not only he but also I _______ interested in seeing films.A. isB. areC. amD. be〔〕5. The old man lived alone all his life and he____________ a snowy winter evening.A. passed away onB. past away onC. passed away inD. past away in〔〕6. When________ that it was getting late, I put off the light and went to bed.A. findB. findingC. foundD. to find〔〕7. Hepburn is known __winning an Oscar _ Best Actress __ her role in the film Roman Holiday.A. as, for, ofB. for, of ,asC. for, for ,forD. as, of ,for 〔〕8. _________ wonderful news report he wrote! All of us were proud of him.A. What aB. WhatC. HowD. How a〔〕9. She finally directed the film_______her own novel.A. basingB. basing onC. basedD. based on〔〕10. Though I like the house very much, its price __________ my ability to pay.A. goes beyondB. goes furtherC. goes downD. begins with〔〕11 It is impossible for ______ little children to do ______ much work within 20 minutes.A. so, soB. so, suchC. such, soD. such , such〔〕12. ----______ hot weather these days! ----Yes, it will last ______.A. What a, two another daysB. What, another two daysC. How, for two more daysD. How, two days more〔〕13.It is ______fine weather _______we can go swimming today.A.so, thatB. such, thatC. too, thatD. too, to〔〕14.Hepburn acted very_____.Sometimes when she didn’t feel_____, she still kept acting.A. good, fineB. good, goodC. well, wellD. good, well〔〕15. You can’t imagine how beautiful the mountain is ______you see it with your own eyes.A .until B. after C. while D. when〔〕16. —Are you going to introduce Chinese kung fu to your friends in your hometown?—Sure! I will lend them my DVDs I bought here ______ they can learn about Chinese kung fuas much as possible.A. in orderB. becauseC. so thatD. such that〔〕17. All of us believe he has a gift _______ dancing, ________ he doesn’t like it at all.A. for, asB. of , thoughC. for, thoughD. of ,as〔〕18. __________ like Tiger Watch have been filmed around the world.A. The number of the documentariesB. A number of documentariesC.A bit documentariesD.A great deal documentaries〔〕19. It’s reported that several young children have gone _________in Taizhou, their parentsfeel very sad about the _______ of them.A. miss, lossB. missing, lossC. missed, lossD. missing, lost 〔〕20. —Do you know _______________ at the cinema this month?—I’m not sure, but I’ll tell you as soon as it shows.A How often will Transformers4 be shown B. whether Transformers4 will showC. How Transformers4 will be shownD. When will Transformers4 show二、完形填空〔共12分，每题1分〕。
译林版英语八年级上册第十七周周末作业
八上第十七周周末作业一、选择：( )1. ______ you know English is important, you should learn it well.A. SinceB. ForC. Because ofD. But( )2. —Wasn’t there a car accident last night? —_____. But luckily, no one was hurt.A. Yes, there wasB. No, there wasn’tC. Yes, it wasD. No, it wasn’t ( )3. Did you _____ the fire in the USA last week?A. hear aboutB. findC. hear fromD. heard( )4. Then the _____ noise became _____ loud. It sounded like bombs under the ground.A. real; realB. real; reallyC. really; reallyD. really; real( )5. People found the dog still ________ after the car accident.A. is livingB. liveC. aliveD. lives( )6. When the earthquake hit the city, most houses ___________.A. came downB. turned downC. put downD. wrote down( )7. Tom was listening to music_____ the teacher told him to answer the questions.A. untilB. whileC. whenD. since( )8. The boys were playing chess __ the girls were playing volleyball on the playground.A. sinceB. ifC. becauseD. while( )9. ______ last, they arrived ____ the morning of June 20, 2015.A. In; atB. By; onC. At; inD. At; on( )10. You don’t need to worry about him ____ he said he could do it well by himself.A. sinceB. soC. butD. if( )11. ——What do you think of the color of the new dress?——Sorry, I ______ about something else. I didn’t see it.A. was thinkingB. am thinkingC. thoughtD. think( )12. My geography teacher told us that the sun ______ from the east.A. risingB. roseC. was risingD. rises二、词汇：1. The heavy rain ____________ (水灾) in many parts of the country.2. They went to Zhenjiang by _______________ (长途汽车)。
2022-2023学年第一学期北师大版九年级数学第十七周周末综合作业题(附答案)
2022-2023学年第一学期北师大版九年级数学第十七周周末综合作业题（附答案）一．选择题1．如图，点A、B、C在⊙O上，∠ABO＝30°，∠ACO＝45°，则∠BOC等于（）A．60°B．90°C．150°D．160°2．关于抛物线y＝x2﹣2x﹣1，下列说法中错误的是（）A．开口方向向上B．对称轴是直线x＝1C．当x＞1时，y随x的增大而减小D．顶点坐标为（1，﹣2）3．如图，在Rt△ABC中，∠ACB＝90°，CD⊥AB于D，下列式子正确的是（）A．sin A＝B．cos A＝C．tan A＝D．cos B＝4．如图，⊙O是△ABC的外接圆，∠B＝60°，OP⊥AC于点P，OP＝2，则⊙O的半径为（）A．4B．6C．8D．125．如图，某厂生产一种扇形折扇，OB＝10cm，AB＝20cm，其中裱花的部分是用纸糊的，若扇子完全打开摊平时纸面面积为πcm2，则扇形圆心角的度数为（）A．120°B．140°C．150°D．160°6．抛物线y＝ax2+bx+c的对称轴为直线x＝﹣1，图象过（1，0）点，部分图象如图所示，下列判断中：其中正确的个数是（）①abc＞0；②b2﹣4ac＞0；③9a﹣3b+c＝0；④若点（﹣2.5，y1），（﹣0.5，y2）均在抛物线上，则y1＞y2；⑤5a﹣2b+c＜0．A．2个B．3个C．4个D．5个7．如图，抛物线y＝ax2+bx+c与x轴交于点A（﹣1，0），顶点坐标（1，n）与y轴的交点在（0，2），（0，3）之间（包含端点），则下列结论：①3a+b＜0；②﹣1≤a≤﹣；③对于任意实数m，a+b≥am2+bm总成立；④关于x的方程ax2+bx+c＝n﹣1有两个不相等的实数根．其中结论正确的个数为（）A．1个B．2个C．3个D．4个8．如图，以点P为圆心，以为半径的圆弧与x轴交于A，B两点，点A的坐标为（2，0），点B的坐标为（6，0），则圆心P的坐标为（）A．（4，）B．（4，2）C．（4，4）D．（2，）9．如图，将边长为1cm的等边三角形ABC沿直线l向右翻动（不滑动），点B从开始到结束，所经过路径的长度为（）A．cm B．（2+π）cm C．cm D．3cm二．填空题10．如图，是半圆，点O为圆心，C、D两点在上，且AD∥OC，连接BC、BD．若＝65°，则∠ABD的度数为．11．如图，一渔船由西往东航行，在A点测得海岛C位于北偏东60°的方向，前进20海里到达B点，此时，测得海岛C位于北偏东30°的方向，则海岛C到航线AB的距离CD 等于海里．12．如图，平行四边形ABCD的一边AB在x轴上，长为5，且∠DAB＝60°，反比例函数y＝和y＝分别经过点C，D，则AD＝．13．有三张正面分别写有数字﹣1，1，2的卡片，它们背面完全相同，现将这三张卡片背面朝上洗匀后随机抽取一张，以其正面数字作为a的值，然后再从剩余的两张卡片随机抽一张，以其正面的数字作为b的值，则点（a，b）在第二象限的概率为．14．《孙子算经》是我国古代重要的数学著作，成书于约一千五百年前，其中有道歌谣算题：“今有竿不知其长，量得影长一丈五尺，立一标杆，长一尺五寸，影长五寸，问杆长几何？”歌谣的意思是：有一根竹竿不知道有多长，量出它在太阳下的影子长一丈五，同时立一根一尺五的小标杆，它的影长五寸（提示：仗和尺是古代的长度单位，1丈＝10尺，1尺＝10寸），可以求出竹竿的长为尺．15．如图是某几何体的三视图及相关数据，则该几何体的侧面积是．16．如图，某地修建高速公路，要从A地向B地修一条隧道（点A，B在同一水平面上）．为了测量A，B两地之间的距离，一架直升飞机从A地出发，垂直上升900米到达C处，在C处观察B地的俯角为30°，则A，B两地之间的距离为．17．若函数y＝16x与y＝的图象有一个交点是，则另一个交点坐标是．18．一艘货轮由西向东航行，在A处测得灯塔P在它的北偏东60°方向，继续航行到达B 处，测得灯塔P在正南方向10海里的C处是港口，点A、B、C在一条直线上，则这艘货轮由A处到B处航行的路程为海里（结果保留根号）．19．如图，已知AM为⊙O的直径，直线BC经过点M，且AB＝AC，∠BAM＝∠CAM，线段AB和AC分别交⊙O于点D、E，∠BMD＝40°，则∠EOM＝．20．已知边长为6cm的等边三角形ABC，以AB为直径画半圆（如图），则阴影部分的面积是（结果保留π）21．如图所示，一动点从半径为2的⊙O上的A0点出发，沿着射线A0O方向运动到⊙O上的点A1处，再向左沿着与射线A1O夹角为60°的方向运动到⊙O上的点A2处；接着又从A2点出发，沿着射线A2O方向运动到⊙O上的点A3处，再向左沿着与射线A3O夹角为60°的方向运动到⊙O上的点A4处．……按此规律运动到点A2020处，则点A2020与点A0间的距离是．22．如图，两圆相交于A，B两点，小圆经过大圆的圆心O，点C，D分别在两圆上，若∠ADB＝100°，则∠ACB的度数为．三．解答题23．计算题：（1）计算：sin45°+cos230°•tan60°﹣tan45°；（2）已知α是锐角，2sin（α﹣15°）＝，求﹣|cosα﹣tan|的值．24．在一次数学兴趣小组活动中，阳光和乐观两位同学设计了如图所示的两个转盘做游戏（每个转盘被分成面积相等的几个扇形，并在每个扇形区域内标上数字）．游戏规则如下：两人分别同时转动甲、乙转盘，转盘停止后，若指针所指区域内两数和小于12，则阳光获胜，反之则乐观获胜（若指针停在等分线上，重转一次，直到指针指向某一份内为止）．（1）请用列表或画树状图的方法表示出上述游戏中两数和的所有可能的结果；（2）游戏对双方公平吗？请说明理由．25．如图，在平面直角坐标系中，将一块等腰直角三角板ABC放在第二象限，点C坐标为（﹣1，0），点A坐标为（0，2）．一次函数y＝kx+b的图象经过点B、C，反比例函数y ＝的图象经过点B．（1）求一次函数和反比例函数的关系式；（2）直接写出当x＜0时，kx+b﹣＜0的解集；（3）在x轴上找一点M，使得AM+BM的值最小，直接写出点M的坐标和AM+BM的最小值．26．如图，某仓储中心有一斜坡AB，其坡度为i＝1：2，顶部A处的高AC为4m，B、C在同一水平地面上．（1）求斜坡AB的水平宽度BC；（2）矩形DEFG为长方体货柜的侧面图，其中DE＝2.5m，EF＝2m，将该货柜沿斜坡向上运送，当BF ＝3.5m 时，求点D 离地面的高．（结果保留根号）27．汽车租赁公司拥有某种型号的汽车100辆．公司在经营中发现每辆车的月租金x （元）与每月租出的车辆数（y ）有如下关系：x （元）3000 3200 3500 4000 y （辆） 100 96 90 80（1）观察表格，用所学过的一次函数、反比例函数或二次函数的有关知识，求按照表格呈现的规律，每月租出的车辆数y （辆）与每辆车的月租金x （元）之间的关系式．（2）已知租出的车每辆每月需要维护费150元，未租出的车每辆每月需要维护费50元．用含x （x ≥3000）的代数式填表：租出的车辆数（辆）未租出的车辆数（辆） 租出每辆车的月收益（元） 所有未租出的车辆每月的维护费（元）（3）若你是该公司的经理，你会将每辆车的月租金定为多少元，才能使公司获得最大月收益？请说明理由．28．如图，点M 在函数y ＝（x ＞0）的图象上，过点M 分别作x 轴和y 轴的平行线交函数y ＝（x ＞0）的图象于点B ，C ．（1）若点M 的坐标为（1，3），求B ，C 两点的坐标；（2）若点M 是y ＝（x ＞0）的图象上任意一点，求△BMC 的面积．29．为了身体健康，越来越多的人喜欢上了行走健身，为方便群众步行健身，某地政府决定对一段如图1所示的坡路进行改造．如图2所示，改造前的斜坡AB ＝260米，坡度为1：；将斜坡AB 的高度AE 降低AC ＝30米后，斜坡AB 改造为斜坡CD ，其坡度为1：4．求斜坡CD的长．（结果保留根号）30．某校组织代表队参加市“与经典同行”吟诵大赛，初赛后对选手成绩进行了整理，分成5个小组（x表示成绩，单位：分）．A组：75≤x＜80；B组：80≤x＜85；C组：85≤x ＜90；D组：90≤x＜95；E组：95≤x＜100，并绘制如下两幅不完整的统计图：请根据图中信息，解答下列问题：（1）参加初赛的选手共有名，请补全频数分布直方图；（2）扇形统计图中，E组人数占参赛选手的百分比是多少？它对应的圆心角是多少度？（3）学校准备组成8人的代表队参加市级决赛，E组6名选手直接进入代表队，现要从D组中的两名男生和两名女生中，随机选取两名选手进入代表队，请用列表或画树状图的方法，求恰好选中两名女生的概率．31．某广告公司设计一幅周长为16米的矩形广告牌，广告设计费为每平方米2000元，设矩形一边长为x，面积为S平方米．（1）求S与x之间的函数关系式，并写出自变量x的取值范围；（2）设计费能可以达到30000元吗？为什么？（3）当x是多少米时，设计费最多？最多是多少元？32．如图，一次函数y＝kx+b与反比例函数y＝（x＞0）交于A（2，4），B（a，1）两点，与x轴、y轴分别交于点C，D．（1）求一次函数和反比例函数的表达式；（2）求证：AD＝BC．33．如图，AB是⊙O的直径，C是⊙O上一点，D是的中点，E为OD延长线上一点，且∠CAE＝2∠C，AC与BD交于点H，与OE交于点F．（1）求证：AE是⊙O的切线；（2）若DH＝9，sin C＝，求直径AB的长．34．如图1，已知抛物线y＝ax2+bx+3（a≠0）与x轴交于点A（1，0）和点B（﹣3，0），与y轴交于点C．（1）求抛物线的表达式；（2）如图1，若点E为第二象限抛物线上一动点，连接BE，CE，求四边形BOCE面积的最大值，并求此时E点的坐标；（3）如图2，在x轴上是否存在一点D使得△ACD为等腰三角形？若存在，请求出所有符合条件的点D的坐标；若不存在，请说明理由．35．如图，AB是⊙O的直径，C是的中点，CE⊥AB于E，BD交CE于点F，（1）求证：CF＝BF；（2）若CD＝12，AC＝16，求⊙O的半径和CE的长．36．某宾馆有30个房间供游客住宿，当每个房间的房价为每天160元时，房间会全部住满．当每个房间每天的房价每增加10元时，就会有一个房间空闲．宾馆需对游客居住的每个房间每天支出20元的各种费用．根据规定，每个房间每天的房价不得高于260元．设每个房间的房价每天增加x元（x为10的整数倍）．（1）设一天订住的房间数为y，直接写出y与x的函数关系式及自变量x的取值范围；（2）设宾馆一天的利润为w元，求w与x的函数关系式；（3）一天订住多少个房间时，宾馆的利润最大？最大利润是多少元？37．如图，已知抛物线与x轴交于A（﹣1，0）、E（3，0）两点，与y轴交于点B（0，3）．（1）求抛物线的解析式；（2）设抛物线顶点为D，求四边形AEDB的面积；（3）△AOB与△DBE是否相似？如果相似，请给以证明；如果不相似，请说明理由．38．如图，BC是⊙O的直径，A是⊙O上一点，过点C作⊙O的切线，交BA的延长线于点D，取CD的中点E，AE的延长线与BC的延长线交于点P．（1）说明：AP是⊙O的切线；（2）若OC＝CP，AB＝6，求CD的长．39．把一副三角板如图甲放置，其中∠ACB＝∠DEC＝90°，∠A＝45°，∠D＝30°，BC ＝+1．斜边AB、DC相交于点O．（1）求CO的长；（2）若把三角板DCE绕点C顺时针旋转15°得到△D1CE1（如图乙），这时AB与CD1相交于点O1，此时，求：CO1的长；（3）若把三角板D1CE1绕着点C顺时针再旋转15°得△D2CE2（如图丙），这时AB与CD2相交于点O2，此时，求：CO2的长．40．如图，抛物线y＝﹣x2+bx+c交x轴于A，B两点，交y轴于点C，直线y＝﹣x+2经过点B，C．（1）求抛物线的解析式；（2）点P是直线BC上方抛物线上一动点，设点P的横坐标为m．求△PBC面积最大值和此时m的值；（3）Q是抛物线上一点，若∠ABC＝∠CBQ，直线BQ与y轴交于点M，请直接写出M 的坐标．参考答案一．选择题1．解：过A作⊙O的直径，交⊙O于D；在△OAB中，OA＝OB，则∠BOD＝∠ABO+∠OAB＝2×30°＝60°，同理可得：∠COD＝∠ACO+∠OAC＝2×45°＝90°，故∠BOC＝∠BOD+∠COD＝150°．故选：C．2．解：抛物线y＝x2﹣2x﹣1，∵a＝1＞0，∴开口方向向上，故选项A不合题意；对称轴是直线x＝﹣＝﹣＝1，故选项B不合题意；当x＞1时，y随x的增大而增大，故选项C符合题意；y＝x2﹣2x﹣1＝（x﹣1）2﹣2，顶点坐标为（1，﹣2），故选项D不合题意．故选：C．3．解：∵∠ACB＝90°，CD⊥AB，∴∠A+∠DCA＝90°，∠DCA+∠BCD＝90°，∴∠A＝∠BCD，∴sin A＝sin∠BCD＝，故选：A．4．解：∵圆心角∠AOC与圆周角∠B所对的弧都为，且∠B＝60°，∴∠AOC＝2∠B＝120°，又OA＝OC，∴∠OAC＝∠OCA＝30°，∵OP⊥AC，∴∠APO＝90°，在Rt△AOP中，OP＝2，∠OAC＝30°，∴OA＝2OP＝4，则圆O的半径4．故选：A．5．解：∵OB＝10cm，AB＝20cm，∴OA＝OB+AB＝30cm，设扇形圆心角的度数为α，∵纸面面积为πcm2，∴﹣＝π，∴α＝150°，故选：C．6．解：①由图象开口向上，则a＞0，故b＞0，∵c＜0，∴abc＜0，故①错误．②∵抛物线与x轴有两个交点，∴b2﹣4ac＞0，故②正确．③∵抛物线与x轴的一个交点是（1，0），对称轴是直线x＝﹣1，∴抛物线与x轴的另一个交点是（﹣3，0），∴9a﹣3b+c＝0，故③正确．④∵点（﹣0.5，y2）在抛物线上，对称轴为直线x＝﹣1，∴（﹣1.5，y2）也在抛物线上，∵﹣1.5＞﹣2.5，且（﹣1.5，y2），（﹣2.5，y1）都在对称轴的左侧，∴y1＞y2，故④正确．⑤∵抛物线对称轴x＝﹣1，经过（1，0），∴﹣＝﹣1，a+b+c＝0，∴b＝2a，c＝﹣3a，∴5a﹣2b+c＝5a﹣4a﹣3a＝﹣2a＜0，∴⑤正确．故正确的判断是②③④⑤共4个．故选：C．7．解：∵抛物线开口向下，∴a＜0，而抛物线的对称轴为直线x＝﹣＝1，即b＝﹣2a，∴3a+b＝3a﹣2a＝a＜0，所以①正确；∵2≤c≤3，把x＝﹣1，y＝0代入y＝ax2+bx+c，得a﹣b+c＝0，∴c＝﹣3a，∴2≤﹣3a≤3，∴﹣1≤a≤﹣，所以②正确；∵抛物线的顶点坐标（1，n），∴x＝1时，二次函数值有最大值n，∴a+b+c≥am2+bm+c，即a+b≥am2+bm，所以③正确；∵抛物线的顶点坐标（1，n），∴抛物线y＝ax2+bx+c与直线y＝n﹣1有两个交点，∴关于x的方程ax2+bx+c＝n﹣1有两个不相等的实数根，所以④正确．故选：D．8．解：过点P作PC⊥AB于点C；即点C为AB的中点，又点A的坐标为（2，0），点B的坐标为（6，0），故点C（4，0）在Rt△P AC中，P A＝，AC＝2，即有PC＝4，即P（4，4）．故选：C．9．解：∵△ABC是等边三角形，∴∠ACB＝60°，∴∠AC（A）＝120°，点B两次翻动划过的弧长相等，则点B经过的路径长＝2×＝π（cm）．故选：C．二．填空题10．解：∵是半圆，即AB是直径，∴∠ADB＝90°，又∵AD∥OC，∴OC⊥BD，∴＝65°，∴＝180°﹣65°﹣65°＝50°，∴∠ABD＝．故答案为：25°．11．解：根据题意可知∠CAD＝30°，∠CBD＝60°，∵∠CBD＝∠CAD+∠ACB，∴∠CAD＝30°＝∠ACB，∴AB＝BC＝20海里，在Rt△CBD中，∠BDC＝90°，∠DBC＝60°，sin∠DBC＝，∴sin60°＝，∴CD＝20×sin60°＝20×＝10海里，故答案为：10．12．解：设点C（x，），则点D（﹣x，），∴CD＝x﹣（﹣x）＝x，∵四边形ABCD是平行四边形，∴CD＝AB＝5，∴x＝5，解得x＝2，∴D（﹣3，），作DE⊥AB于E，则DE＝，∵∠DAB＝60°，∴AD＝＝＝2，故答案为2．13．解：画树状图图得：∵共有6种等可能的结果，点（a，b）在第二象限的有2种情况，∴点（a，b）在第二象限的概率为：＝．故答案为：．14．解：设竹竿的长度为x尺，∵竹竿的影长＝一丈五尺＝15尺，标杆长＝一尺五寸＝1.5尺，影长五寸＝0.5尺，∴＝，解得x＝45（尺）．故答案为：45．15．解：根据图形可知圆锥的高为6，母线长为8，则底面半径为2，圆锥侧面积公式＝底面周长×母线长×，圆锥侧面积＝×π×2×2×8＝16π．故答案为：16π．16．解：由题意知∠BAC＝90°，∠ABC＝30°，AC＝900米，∵tan∠ABC＝，∴AB＝＝＝900（米），故答案为：900米．17．解：∵两函数图象关于原点对称，∴两函数图象交点关于原点对称，∴的对称点为（﹣，﹣4）．故答案为（﹣，﹣4）．18．解：根据题意得：PC＝10海里，∠PBC＝90°﹣45°＝45°，∠P AC＝90°﹣60°＝30°，在直角三角形APC中，∵∠P AC＝30°，∠C＝90°，∴AC＝PC＝10（海里），在直角三角形BPC中，∵∠PBC＝45°，∠C＝90°，∴BC＝PC＝10海里，∴AB＝AC＝BC＝（10﹣10）（海里）；故答案为：（10﹣10）．19．解：连接EM，∵AB＝AC，∠BAM＝∠CAM，∴AM⊥BC，∵AM为⊙O的直径，∴∠ADM＝∠AEM＝90°，∴∠AME＝∠AMD＝90°﹣∠BMD＝50°∴∠EAM＝40°，∴∠EOM＝2∠EAM＝80°，故答案为：80°．20．解：如图，根据等边三角形和圆的对称性，阴影部分的面积就是扇形OMN的面积，由题意得，扇形OMN的半径为3cm，圆心角的度数为60°，S阴影部分＝S扇形OMN＝＝，故答案为：．21．解：如图，∵⊙O的半径＝2，由题意得，A0A1＝4，A0A2＝2，A0A3＝2，A0A4＝2，A0A5＝2，A0A6＝0，A0A7＝4，…∵2020÷6＝336…4，∴按此规律运动到点A2020处，A2020与A4重合，∴A0A2020＝A0A4＝2．22．解：如图：连接OA，OB，∵四边形AOBD是圆内接四边形，∴∠AOB+∠D＝180°，∵∠ADB＝100°，∴∠AOB＝80°，∴∠ACB＝40°．故答案为：40°．三．解答题23．解：（1）原式＝＝1+﹣1＝；（2）∵2sin（α﹣15°）＝，∴，∴α﹣15°＝45°，∴α＝60°，∴原式＝＝＝＝＝1﹣24．解：（1）根据题意列表如下：6789 39101112410111213511121314可见，两数和共有12种等可能结果；（2）游戏对双方公平，理由如下：∵两数和共有12种等可能的情况，其中和小于12的情况有6种，∴阳光获胜的概率为＝，∴乐观获胜的概率是，∵＝，∴游戏对双方公平．25．解：（1）过点B作BF⊥x轴于点F，∵点C坐标为（﹣1，0），点A坐标为（0，2）．∴OA＝2，OC＝1，∵∠BCA＝90°，∴∠BCF+∠ACO＝90°，又∵∠CAO+∠ACO＝90°，∴∠BCF＝∠CAO，在△AOC和△CFB中∴△AOC≌△CFB（AAS），∴FC＝OA＝2，BF＝OC＝1，∴点B的坐标为（﹣3，1），将点B的坐标代入反比例函数解析式可得：1＝，解得：k＝﹣3，故可得反比例函数解析式为y＝﹣；将点B、C的坐标代入一次函数解析式可得：，解得：．故可得一次函数解析式为y＝﹣x﹣．（2）结合点B的坐标及图象，可得当x＜0时，kx+b﹣＜0的解集为：﹣3＜x＜0；（3）作点A关于x轴的对称点A′，连接B A′与x轴的交点即为点M，∵A（0，2），∴A′（0，﹣2），设直线BA′的解析式为y＝ax+b，将点A′及点B的坐标代入可得：，解得：．故直线BA′的解析式为y＝﹣x﹣2，令y＝0，可得﹣x﹣2＝0，解得：x＝﹣2，故点M的坐标为（﹣2，0），AM+BM＝BM+MA′＝BA′＝＝3．综上可得：点M的坐标为（﹣2，0），AM+BM的最小值为3．26．解：（1）∵坡度为i＝1：2，AC＝4m，∴BC＝4×2＝8m．（2）作DS⊥BC，垂足为S，且与AB相交于H．∵∠DGH＝∠BSH，∠DHG＝∠BHS，∴∠GDH＝∠SBH，∴＝，∵DG＝EF＝2m，∴GH＝1m，∴DH＝＝m，BH＝BF+FH＝3.5+（2.5﹣1）＝5m，设HS＝xm，则BS＝2xm，∴x2+（2x）2＝52，∴x＝m∴DS＝+＝2m．27．解：（1）由表格数据可知y与x是一次函数关系，设其解析式为y＝kx+b．由题：，解之得：，∴y与x间的函数关系是y＝﹣x+160．（2）如下表：租出的车辆数﹣x+160未租出的车辆数x﹣60租出的车每辆的月收益x﹣150所有未租出的车辆每月的维护费x﹣3000（3）设租赁公司获得的月收益为W元，依题意可得：W＝（﹣x+160）（x﹣150）﹣（x﹣3000）＝（﹣x2+163x﹣24000）﹣（x﹣3000）＝﹣x2+162x﹣21000＝﹣（x﹣4050）2+307050当x＝4050时，Wmax＝307050，即：当每辆车的月租金为4050元时，公司获得最大月收益307050元．故答案为：﹣x+160，x﹣60，x﹣150，x﹣3000．28．解：（1）∵点M的坐标为（1，3），MC⊥x轴，MB⊥y轴，且B，C在函数的图象上，∴当x＝1时，y＝1，∴点C的坐标为（1，1）∴当y＝3时，，∴点B的坐标为；（2）设点M的坐标为（a，b）∵点M在函数的图象上，∴ab＝3∵点B，C在函数的图象上，∴点C的坐标为，B点坐标为∴，，∴S△BMC＝•BM•MC＝••＝•＝．29．解：在Rt△ABE中，∵，∴∠ABE＝30°，∵AB＝260，∴，∵AC＝30，∴CE＝130﹣30＝100，在Rt△CDE中，∵tan D＝1：4，∴，∴，∴（米），答：斜坡CD的长是米．30．解：（1）参加初赛的选手共有：8÷20%＝40（人），B组有：40×25%＝10（人），频数分布直方图补充如下：故答案为：40；（2）E组人数占参赛选手的百分比是：×100%＝15%；E组对应的圆心角度数是：360°×15%＝54°；（3）根据题意画树状图如下：由上图可以看出，所有可能出现的结果有l2种，这些结果出现的可能性相等，选中两名女生的结果有2种，则选中两名女生的概率是＝＝．31．解：（1）矩形的一边长为x米，周长为16米．另一边长为（8﹣x）米，∴S＝x（8﹣x）＝﹣x2+8x，其中0＜x＜8；（2）能．理由是：∵设计费为每平方米2000元，∴当设计费为30000元时，面积为：30000÷2000＝15（平方米）即﹣x2+8x＝15，解得x1＝3，x2＝5；∴设计费能达到30000元；（3）∵S＝﹣x2+8x＝﹣（x﹣4）2+16，∴当x＝4时，S最大值＝16，∴16×2000＝32000．∴当x是4米时，矩形的最大面积为16平方米，设计费最多，最多是32000元．32．解：（1）将A（2，4）代入，得m＝8，∴反比例函数的表达式为∴又B（a，1）在反比例函数的图象上，∴，解得，a＝8∴B（8，1）将A（2，4），B（8，1）代入y＝kx+b中，得，解得：∴一次函数的表达式为．（2）由（1）可知，一次函数的表达式为当x＝0时，y＝5；当y＝0时，x＝10；∴C（10，0），D（0，5），如图，过点A作y轴的垂线与y轴交于点E，过B作x轴的垂线与x轴交于点F，∴E（0，4），F（8，0），∴AE＝2，DE＝1，BF＝1，CF＝2∴在Rt△ADE中，由勾股定理得：在Rt△BCF中，由勾股定理得：∴AD＝BC．33．证明：（1）连接OC，∵D是的中点，∴∠AOD＝∠COD∵OA＝OC，∴OE⊥AC，即∠AFE＝90°，∴∠E+∠EAF＝90°∵∠AOE＝2∠C，∠CAE＝2∠C，∴∠CAE＝∠AOE∴∠E+∠AOE＝90°，∴∠EAO＝90°∴AE是⊙O的切线（2）∵∠C＝∠B∵OD＝OB，∴∠B＝∠ODB，∴∠ODB＝∠C∴，∴由勾股定理得：∵∠C＝∠FDH，∠DFH＝∠CFD∴△DFH∽△CFD∴∴∴设OA＝OD＝x，∴∵AF2+OF2＝OA2∴，解得：x＝10∴OA＝10∴直径AB的长为20．34．解：（1）将点A（1，0），B（﹣3，0）代入y＝ax2+bx+3，得，，解得，，∴抛物线表达式为y＝﹣x2﹣2x+3；（2）如图1，过点E作EF⊥x轴于点F，设E（a，﹣a2﹣2a+3）（﹣3＜a＜0），∴EF＝﹣a2﹣2a+3，BF＝a+3，OF＝﹣a，∴＝＝＝，∴当时，S四边形BOCE最大，且最大值为；当时，，此时，点E坐标为；（3）如图2，连接AC，①当CA＝CD时，此时CO为底边的垂直平分线，满足条件的点D1，与点A关于y轴对称，点D1坐标为（﹣1，0）；②当AD＝AC时，在Rt△ACO中，∵OA＝1，OC＝3，由勾股定理得，AC＝＝，以点A为圆心，AC的长为半径作弧，交x轴于两点D2，D3，即为满足条件的点，此时它们的坐标分别为，；③当DA＝DC时，线段AC的垂直平分线与x轴的交点D4，即为满足条件的点，设垂直AC的垂直平分线交y轴于点P，过AC中点Q，∵∠AOC＝∠BOC＝∠PQC＝∠PQA＝90°，∠D4PO＝∠CPQ，∴∠ACO＝∠OD4P，∴△D4AQ∽△CAO，∴＝，即＝，∴D4A＝5，∴OD4＝D4A﹣OA＝4，∴点D4的坐标为（﹣4，0）；综上所述，存在符合条件的点D，其坐标为D1（﹣1，0）或或或D4（﹣4，0）．35．解：（1）证明：∵AB是⊙O的直径，∴∠ACB＝90°，又∵CE⊥AB，∴∠CEB＝90°，∴∠2＝90°﹣∠ABC＝∠A，又∵C是弧BD的中点，∴∠1＝∠A，∴∠1＝∠2，∴CF＝BF；（2）∵C是弧BD的中点，∴＝，∴BC＝CD＝12，又∵在Rt△ABC中，AC＝16，∴由勾股定理可得：AB＝20，∴⊙O的半径为10，∵S△ABC＝AC•BC＝AB•CE，∴CE＝＝9.6．36．解：（1）y＝30﹣x（0≤x≤100，且x是10的整数倍）；（2）w＝（30﹣x）（160+x﹣20）＝﹣x2+16x+4200；（3）w＝﹣x2+16x+4200＝﹣（x﹣80）2+4840∴当x＝80时，w最大为10600．当x＝80时，y＝30﹣x＝22．答：一天订住22个房间时，宾馆每天利润最大，最大利润是4840元．37．解：（1）∵抛物线与y轴交于点（0，3），∴设抛物线解析式为y＝ax2+bx+3（a≠0）根据题意，得，解得．∴抛物线的解析式为y＝﹣x2+2x+3；（2）如图，设该抛物线对称轴是DF，连接DE、BD．过点B作BG⊥DF于点G．由顶点坐标公式得顶点坐标为D（1，4）设对称轴与x轴的交点为F∴四边形ABDE的面积＝S△ABO+S梯形BOFD+S△DFE＝AO•BO+（BO+DF）•OF+EF•DF＝×1×3+×（3+4）×1+×2×4＝9；（3）相似，如图，BD＝；∴BE＝DE＝∴BD2+BE2＝20，DE2＝20即：BD2+BE2＝DE2，所以△BDE是直角三角形∴∠AOB＝∠DBE＝90°，且，∴△AOB∽△DBE．38．（1）证明：连接AO，AC（如图）．∵BC是⊙O的直径，∴∠BAC＝∠CAD＝90°．∵E是CD的中点，∴CE＝DE＝AE．∴∠ECA＝∠EAC．∵OA＝OC，∴∠OAC＝∠OCA．∵CD是⊙O的切线，∴CD⊥OC．∴∠ECA+∠OCA＝90°．∴∠EAC+∠OAC＝90°．∴OA⊥AP．∵A是⊙O上一点，∴AP是⊙O的切线；（2）解：由（1）知OA⊥AP．在Rt△OAP中，∵∠OAP＝90°，OC＝CP＝OA，即OP＝2OA，∴sin P＝．∴∠P＝30°．∴∠AOP＝60°．∵OC＝OA，∴∠ACO＝60°．在Rt△BAC中，∵∠BAC＝90°，AB＝6，∠ACO＝60°，∴．又∵在Rt△ACD中，∠CAD＝90°，∠ACD＝90°﹣∠ACO＝30°，∴CD＝＝＝＝4．39．解：（1）过点O作OH⊥BC于点H．在Rt△OHB中，∠HOB＝90°﹣∠B＝45°＝∠B∴OH＝HB．∵在Rt△DCE中，∠DCE＝90°﹣∠D＝60°∴在Rt△OHC中，∠COH＝90°﹣∠OCH＝90°﹣60°＝30°∴OC＝2CH．又∵OH＝CH•tan∠OCH＝，∴HB＝OH＝．又∵CH+HB＝CB，∴CH+＝．∴CH＝1．∴CO＝2CH＝2；（2）∵∠BCE1＝15°∴∠O1CB＝60°﹣15°＝45°＝∠B．∴∠CO1B＝180°﹣（45°+45°）＝90°∴CO1＝BC•sin∠B＝＝；（3）从甲图到丙图的过程中，由于旋转角均为15°，且在乙图中CO1⊥AB，所以CO2与CO在这个旋转过程中关于直线CO1成轴对称．所以CO2＝CO＝2．40．解：（1）针对于直线y＝﹣x+2，令x＝0，则y＝2，∴C（0，2），令y＝0，则﹣x+2＝0，∴x＝4，∴B（4，0），∵抛物线y＝﹣x2+bx+c过点B，点C，∴，∴，∴抛物线的解析式为y＝﹣x2+x+2；（2）如图1，过点P作PD∥y轴交直线BC于D，∵点P的横坐标为m，∴P（m，﹣m2+m+2），D（m，﹣m+2），∴PD＝﹣m2+m+2﹣（﹣m+2）＝﹣m2+4m，∴S△PBC＝PD（x B﹣x C）＝（﹣m2+4m）×4＝﹣2（m﹣2）2+8，当m＝2时，S△PBC最大，其值为8．（3）如图2，过点C作CN⊥BM于N，∴∠MNC＝90°＝∠BOC，∵∠ABC＝∠CBQ，∴CN＝OC＝2，∵∠CMN＝∠BMO，∠CNM＝∠BOM＝90°，∴△MNC∽△MOB，∴，∴，∴OM＝2MN，∴CM＝OM﹣OC＝2MN﹣2，在Rt△CNM中，根据勾股定理得，MN2+CN2＝CM2，∴MN2+4＝（2MN﹣2）2，∴MN＝0（舍）或MN＝，∴OM＝2MN＝，∴M（0，），当点Q与点A重合时，点M和点O重合，此时M（0，0），即点M的坐标为（0，0）或（0，）．。
2021-2022年高二上学期第十七次周练英语试题 含答案
Ⅰ.单项填空(每小题1分，共15分)从题中所给的A、B、C、D四个选项中选出一个最佳答案。
1．She's developing into someone who's going to bee very poor and require ________.A．looked after B．being looked afterC．looking after D．to look after2．The survey shows that a large number of teenagers are ________ cigarettes nowadays.A．devoted to B．related toC．connected to D．addicted to3．I searched the website. Unfortunately, the movie that I had seen many times was no longer ________.A．valuable B．reliableC．available D．incredible4．—Have you got the news about Jack? I haven't seen him for many years.—He ________ in a pany for two years. Now he is a teacher.A．worked B．has workedC．had worked D．would work5．Poor Tony has ________ a bad headache for a long time, so he didn't passthe midterm examination.A．suffered from B．sufferedC．stood D．borne6．The racers ________ their positions on the starting line at the sound of the whistle.A．took up B．made upC．help up D．set up7．I ________ to give her a hand to carry the suitcase but she refused.A．afforded B．managedC．tried D．offered8．I took ________ for granted that the Chinese Women Volleyball Team would lose the final match, but to our astonishement, we won it.A．what B．thatC．one D．it9．A button ________ as I was climbing over the wall in a hurry.A．came away B．came outC．came down D．came off10．Mike ________ have stolen the money from the bank, ________ he appeared to be rich overnight.A．can't; for B．might; forC．might; since D．can't; since11．He was ________ with the results of the exam, which can be seen from his ________ smile.A．satisfied; satisfyingB．satisfied; satisfiedC．satisfying; satisfiedD．satisfying; satisfying12．He ________ to lend me his dictionary but I refused, for I don't think it of any use.A．managed B．volunteeredC．considered D．afford13．Your suggestion sounds fine ________， but would it work ________？A．in practice; in theoryB．in theory; in practiceC．in advance; in theoryD．in general: in practice14．—Hello, is that Tom speaking?—Sorry, you ________ the wrong number.A．may have dialed B．must have dialedC．could dial D．might dial15．________ time going on, we are growing up and e to understand our parents.A．When B．WithC．As D．WhileⅡ.完形填空(每小题1分，共20分)阅读下面短文，理解大意，从题中所给的A、B、C、D四个选项中选出一个最佳答案。
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台山一中2012~2013学年第一学期第十七周周末测试题
（高一化学答题卡）
班别：__________ 姓名：____________成绩号：__________成绩：____________ 请将选择题答案填在下表中：
四、非选择题（本题包括4小题，共35分）
36、（16分，每空2分）
（1）；
（2）；；
（3）_____________________________________________；
_______________________________________________。
（4）____________________________________________ ；
（5）___________；___________________________________________________。
37．（10分，每空2分）
(1) A：； B：。
(2) ____________________________________________________；
___________________________________________________。
（3）___________________________________________________。
38．（9分）
39、（共14分，每空2分）
（1）a______________ ; f__________________。
（2）：________________________________________。
（3）：_____________________________________________。
（4）：__________________；________________，
：________________________________________________________________。
答案
请将选择题答案填在下表中：
四、非选择题（本题包括4小题，共35分）
36、（16分，每空2分）
(1) B；（2）CuO ；CO2。
（3）澄清石灰水变浑浊；CO2 + Ca2+ + 2OH— = CaCO3↓+ H2O
（4）点燃未反应的CO，防止污染环境．
（5）不必要；加热CuO前必须先通CO，此时即可观察CO是否能使澄清石灰水变浑浊。
37．（10分，每空2分）
(1) HCl Cl2
(2) 2Fe3+ + Fe = 3Fe2+，Cu2+ + Fe = Cu + Fe2+；
(3) 2FeCl2 + Cl2 = 2FeCl3
38．（9分）
(1) N(NaOH) = 0.1L*0.1mol/L = 0.01mol
V = 0.01mol / 2mol/L =0.005L=5ml （4分）
(2) N(NaOH)=0.05L * 0.1mol/L =0.005mol
HCl + NaOH = NaCl + H2O
1mol 1mol
0.005mol 0.005mol
V=0.005mol / 1mol/L =0.005L=5ml （5分）
39、附加题（共14分，每空2分）
（1）SiO2 ；Al(OH)3。
（2）SiO2+4HF =SiF4↑ + 2H2O (3) Fe3+ + 3OH—=Fe(OH)3↓
（4）CO2，不能；氯化氢溶于水即得盐酸，盐酸是强酸，盐酸过量时会溶解Al(OH)3。
（高一化学）
39、铝土矿的主要成分是Al2O3，含有Fe2O3、SiO2等杂质，按下列操作从铝土矿中提取Al2O3。
回答下列问题：
（1）沉淀物的化学式分别是：a______________ ; f__________________。
（2）写出SiO2与氢氟酸反应的化学方程式：________________________________________。
（3）写出生成沉淀d的离子方程式：_____________________________________________。
（4）通入的气体A是：_________________；能否将A换成氯化氢___________（填“能”或“不能”），其理由是：______________________________________________________。