当前位置:文档之家› 江苏省宿迁市宿豫中学高考英语二轮语法专项训练 定语从句(5)

江苏省宿迁市宿豫中学高考英语二轮语法专项训练 定语从句(5)

江苏省宿迁市宿豫中学高考英语二轮语法专项训练 定语从句(5)
江苏省宿迁市宿豫中学高考英语二轮语法专项训练 定语从句(5)

定语从句

定语从句得分要诀

明位置

记关联

辨结构

找特殊

I have got the very book that you recommended.

题一:

Many countries are now setting up national parks ______ animals and plants can be protected.

A. when

B. which

C. whose

D. where

题二:

The book tells stories of the earthquake through the eyes of those _______ lives were affected.

A. whose

B. that

C. who

D. which

题三:

Happiness and success often come to those _______are good at recognizing their own strengths.

A. whom

B. who

C. what

D. which

题四:

The president of the World Bank says he has a passion for China, ______ he remembers starting as early as his childhood.

A. where

B. which

C. what

D. when

题五:

He wrote a letter ______ he explains what had happened in the accident.

A. what

B. which

C. where

D. how

题六:

He may win the competition, _____ he is likely to get into the national team. A. in which case B. in that case

C. in what case

D. in whose case

题七:

Finally he reached a lonely island _________ was completely cut off from the outside world.

A. when

B. where

C. which

D. whom

题八:

______ is often the case with children, Amy was better by the time the doctor arrived.

A. It

B. That

C. What

D. As

题九:

Nowadays people are more concerned about the environment ______ they live.

A. what

B. which

C. when

D. where

题十:

“You can’t judge a book by its cover,” ______.

A. as the saying goes old

B. goes as the old saying

C. as the old saying goes

D. goes as old the saying

题十一:

The children, ______ had played the whole day long, were worn out.

A. all of what

B. all of which

C. all of them

D. all of whom

题十二:

John invited about 40 people to his wedding, most of ______ are family members.

A. them

B. that

C. which

D. whom

定语从句判定方法

确定先行词

看从句结构中少什么成分

回马枪

牢记一个特殊对象 as

As we all know, the earth goes around the sun.

The earth goes around the sun, as we all know.

I bought the same book as you have.

He was admitted to the company, which made his families delighted.

He was admitted to the company, as his families expected.

破除一个误解

in which = where ?

课后拓展练习

注:此部分为老师根据本讲课程内容为大家精选的课下拓展题目,故不在课堂中讲解,请同学们课下自己练习并对照详解进行自测.

题一:

With the rapid development of agriculture, the people in ________ village I taught before have lived a happy life.

A. who

B. where

C. whose

D. which

题二:

Shopping on the Internet has a lot of advantages, ________ the most important is perhaps its convenience.

A. of which

B. whose

C. that

D. in which

题三:

The prize will go to the writer story shows the most imagination.

A. that

B. which

C. whose

D. what

题四:

Julie was good at German, French and Russian, all of ____ she spoke fluently A who B whom C which D that

题五:

I still can’t believe my eyes when I remember the scene________ the best player

should miss the pass.

A. that

B. which

C. where

D. how

题一:D 题二:A 题三:B 题四:B 题五:C 题六:A

题七:C 题八:D 题九:D 题十:C 题十一:D 题十二:D

江苏省宿迁市宿豫中学2019-2020学年高二下学期复学考试数学试题

江苏省宿迁市宿豫中学2019-2020学年高二下学期 复学考试数学试题 学校_________ 班级__________ 姓名__________ 学号__________ 一、单选题 1. 设复数,,则复数的虚部是()A.B.C.D. 2. 函数的导数是() A.B. C.D. 3. 袋中有大小相同的三个白球和两个黑球,从中任取两个球,两球同色的概率为() A.B.C.D. 4. 现有6位同学站成一排照相,甲乙两同学必须相邻的排法共有多少种? () A.720 B.360 C.240 D.120 5. 已知随机变量之间具有关系,如,则= () A.7 B.17 C.28 D.63 6. 函数f(x)=x3-x2+mx+1不是R上的单调函数,则实数m的取值范围是 () A.B. C.D.

7. 从1,2,3,4,5,6,7中取出两个不同数,记事件为“两个数之和为偶数”,事件为“两个数均为偶数”,则() A.B.C.D. 8. 如图是函数f(x)及f(x)在点A处切线的图像,则 () A.0 D.2 B.C. 9. 若9人乘坐2辆汽车,每辆汽车最多坐5人,则不同的乘车方法有多少种?() A.B.C.D. 10. 已知函数,若,则实数的取值范围是() A.B.C.D. 11. 射手用手枪进行射击,击中目标就停止,否则继续射击,他射中目标的概率是0.8,若枪内只有3颗子弹,则他射击次数的数学期望是()A.0.8 B.0.992 C.1 D.1.24 12. 的二项展开式中所有有理项(指数为整数)有几项?()A.1 B.2 C.3 D.4 二、填空题

13. 计算:__________ 14. 质点按规律做直线运动(位移单位:,时间单位:),则质点在时的瞬时速度为______(单位:) 15. 在某项测量中,测量结果服从正态分布,若在(0,4)内取值的概率为0.6,则在(0,+∞)内取值的概率为__________ 16. 记(3+x)8=a0+a1(2+x)+a2(2+x)+…+a8(2+x)8,则a1+a2+…+a6+a的值为____________.(结果以数字作答) 三、解答题 17. (1)求复数z=(i为虚数单位)的共轭复数; (2)已知对应的点分别为A、B,设向量对应的复数为 ,求并求. 18. (1)求曲线在点处的切线方程; (2)求经过点(4,0)且与曲线相切的直线方程. 19. 已知二项式的二项展开式中所有奇数项的二项式系数之和为128. (1)求的展开式中的常数项; (2)在 (1+x)+(1+x)2+(1+x)3+(1+x)4+…+(1+x)的展开式中,求项的系数.(结果用数字作答)

2019-2020学年江苏省宿迁市宿豫区九年级(上)期中数学试卷

2019-2020学年江苏省宿迁市宿豫区九年级(上)期中数学试卷 一、选择题(本大题共8小题,每小题3分,共24分.在每小题给出的四个选项中,有且只有一项是符合题目要求的,请将正确选项的字母代号填涂在答题卡相应位置上) 1.(3分)方程x2﹣2x=0的根是() A.x1=x2=0B.x1=x2=2C.x1=0,x2=2D.x1=0,x2=﹣2 2.(3分)小亮同学想知道自己的体重在班级中是否属于中等水平,则需了解全班同学体重的()A.平均数B.中位数C.众数D.极差 3.(3分)如图,点A、B、C在⊙O上,点D是AB延长线上一点,若∠CBD=55°,则∠AOC的度数为() A.100°B.105°C.110°D.125° 4.(3分)将一元二次方程2x2﹣6x+1=0配方,得(x+h)2=k,则h、k的值分别为()A.3、8B.﹣3、8C.、D.、 5.(3分)下列关于三角形的外心说法正确的是() A.三角形的外心一定在它的外部 B.三角形的外心是它三边垂直平分线的交点 C.三角形的外心到它的三边距离相等 D.三角形的外心与它的内心不可能重合 6.(3分)下列方程中没有实数根的是() A.x2﹣4x+3=0B.﹣x2+4x﹣4=0C.﹣x2+4x﹣5=0D.x2﹣4x﹣6=0 7.(3分)如图,正六边形ABCDEF的半径为6,则它的面积为() A.B.C.108D.36π 8.(3分)已知⊙O的直径为8,点P在直线l上,且OP=4,则直线l与⊙O的位置关系是()

A.相离B.相切C.相交D.相切或相交 二、填空题(本大题共10小题,每题3分,共30分.不需写出解答过程,请把答案直接填写在答题卡相应位置上) 9.(3分)有一组数据:8,9,7,9,7,8,8,这组数据的众数为. 10.(3分)若关于x的一元二次方程x2﹣mx+6=0的一个根为2,则它的另一个根为. 11.(3分)某单位要招聘1名英语翻译,对听、说、读、写进行素质测试,小张4项的分数分别为90分、85分、90分、80分.若把听、说、读、写的成绩按3:3:2:2计算,则小张的平均成绩为.12.(3分)一张面积是0.98m2的长方形桌面,长比宽多70cm.设它的宽为xm,可得方程.13.(3分)用半径为24,圆心角为60°的扇形纸片围成一个圆锥的侧面,则这个圆锥的底面圆的半径为. 14.(3分)若某个一元二次方程的两个实数根分别为﹣2、1,则这个方程可以是.(写出一个即可) 15.(3分)如图,在⊙O中,直径BA的延长线与弦ED的延长线相交于点C,且CD=OA.若∠BOE=75°,则∠C的度数为. 16.(3分)如图,⊙O的半径为5,OP=3,过点P画弦AB,则AB的取值范围是. 17.(3分)一块周长为1.2m、面积为0.15m2的三角形铁皮(铁皮厚度忽略不计),现在从中裁下了一块面积最大的圆形铁皮,则裁下的圆形铁皮的半径为. 18.(3分)关于x的方程x2+2﹣1=0有两个不相等的实数根,k的取值范围. 三、解答题(本大题共10题,共96分.请在答题卡指定区域内作答,解答时应写出必要的文字说明、证明过程或演算步骤) 19.(8分)解列方程:x2﹣8x+6=0. 20.(8分)已知y1=2x2+3x,y2=﹣5x+10.x为何值时,y1与y2的值相等?

(完整版)高三英语语法填空专项训练(含答案解析)

高三英语专项训练----语法填空 (1)(Topic: ) Once there lived a rich man who wanted to do something for the people of his town. But first he wanted to find out 16 _______ they deserved his help. In the centre of the main road into the town,he placed 17 ___ very large stone. Then he 18____ (hide) behind a tree and waited. Soon an old man came along with his cow.“Who put this stone in the centre of the road?” said the old man, 19____ he did not try to remove the stone. Instead, with some difficulty he passed around the stone and continued on his way.20 ______ man came along and did the same thing; then another came,and another. All of them complained about the stone but did not tried to remove 21______. Late in the afternoon a young man came along. He saw the stone, 22 _______ (say) to himself: “The night will be very dark. Some neighbors will come along later 23 _____ the dark and will fall against the stone.” Then he began to move the stone. He pushed and pulled with all his 24 ________ (strong) to move it. How great was his surprise at last! 25 ________ the stone,he found a bag of money. (2)(Topic: ) The best gift I ever received is the parents that were given to me. I could not have picked out 16 _______ (good) parents myself. My mom is smart,funny,and very artistic. She loves painting and encouraging other people to paint as well. She owns 17______ own book and art store. And at night she teaches adult 18 ________ (educate). She helps kids 19 _________ have dropped out of high school 20 _________ (get) their diploma. She always has time for me and my brothers. She hardly ever gets mad 21 ______ us and loves doing new things with us,22 _____ going to a new museum or going out onto the beach in the middle of the winter and taking pictures at the beach in the snow. My dad knows 23 _____ to fix anything and loves to play musical instruments. He helps me with my science projects and other school projects. He works hard to make money for our family and hardly ever complains. He loves skating with me and 24______ (build) us a half pipe and other cool things. So I have to say that 25 _______ gift I’m most grateful for is the one the God gave me—my parents. (3)(Topic: ) Sometimes Chinese English teachers are puzzled by such questions,“Have you got any skills in reading comprehension?” Actually,many of the teachers can’t give students 16 ___ efficient way to deal with reading. Anyway,17 _____ often simply say,“Read more and practise more,and you 18 ______ (get) more experience in reading comprehension.” Frankly, these teachers’ good 19_________ (suggest) are only helpful to arouse students’ interest in reading 20 ____ not helpful to deal wit h the questions in the examinations of reading comprehension. Personally,I think the skill for reading comprehension should be based 21 ______ the knowledge of English writing. Since the English passages are written under some rules or principles,the science of reading 22 ______understanding may have a close relationship with writing.

江苏省宿迁市宿豫中学2020┄2021学年高一上学期期中考试化学试卷 Word版 含解析

2020┄2021学年江苏省宿迁市宿豫中学高一(上)期中化学 试卷 一、选择题(本题包括10小题,每小题3分,共30分.每小题只有一个选项符合题意.) 1.宜兴竹海风景区被称为天然氧吧,其原因是空气中的自由电子附着在分子或原子上形成空气负离子,被称为“空气维生素”.O2﹣就是一种空气负离子,其摩尔质量为 () A. 32 g B. 33 g C. 33 g?molˉ1 D. 32 g?molˉ1 2.下列属于电解质并能导电的物质是() A.液态HCl B.熔融的NaOH C. KNO3溶液 D. FeCl3晶体 3.如图所示是分离混合物时常用的仪器,从左至右,可以进行的混合物分离操作分别是() A.蒸馏、蒸发、萃取、过滤 B.萃取、过滤、蒸馏、蒸发 C.蒸馏、过滤、萃取、蒸发 D.过滤、蒸发、萃取、蒸馏 4.下列溶液中的Na+与50mL 1mol?L﹣1 Na3PO3溶液中Na+的物质的量浓度相等的是() A. 150 mL 3 mol?L﹣1 NaCl溶液 B. 75 mL 2 mol?L﹣1 NaNO3溶液 C. 150 mL 2 mol?L﹣1 Na2SO4溶液

D. 75 mL 1 mol?L﹣1的Na2S溶液 5.胶体区别于其它分散系的本质特征是() A.光束通过胶体时有丁达尔效应 B.胶体粒子带电荷 C.胶体是一种介稳性的分散系 D.胶体粒子直径在1﹣100nm之间 6.设N A为阿伏加德罗常数的值,下列说法正确的是() A.常温常压下,16克O3中含有的原子数为N A B.标准状况下,22.4L液溴中含有的分子数为N A C. 1molH2O中含有的原子个数为N A D. 0.1mol/L硫酸铝溶液中含有硫酸根的个数为0.3N A 7.在下列转化中必须加入还原剂才能实现的是() A. CuSO4→Cu B. CaCO3→CO2 C. HCl→Cl2 D. C→CO2 8.在强碱性的无色溶液中能大量共存的离子组是() A. K+、Mg2+、MnO4﹣、Cl﹣ B. Na+、Ba2+、NO3﹣、Cl﹣ C. Na+、H+、SO42﹣、Cl﹣ D. Ca2+、K+、CO32﹣、NO3﹣ 9.氧化还原反应与四种基本类型反应的关系如下图所示,则下列化学反应属于图中阴影部分的是()

高考英语语法填空句子分解专项练习

高考英语语法句子分解专项练习(补充) 一名词 1.Father went to his doctor for_______ (advise)about his heart trouble. 2. There are ten__________ (woman)teachers and two hundred ________(girl) students in the school. 3. Facing cut-throat ______ (compete) in all subjects, students must devote as much of their time as possible. 4. I shall never fear difficulty and I shall never know the _______ (exist) of the word “failure”. 5. You’ll want to know your body language is saying and how to interpret other _______(people). 6. Not long ago he sent ______(word) that he would return with his family. 7. She was in London and spent her ________(young) in China. 8. The ________ (erupt) of Mount Kilauea, one of the most active volcanoes in Hawaii, is always taking people by surprise. 9. His _________ (curious) made him wonder about clouds. 10. Except for some short songs and poems included in his plays, all of _______ (Shakespeare) greatest poems are sonnet. 11. The number of languages is getting smaller all the time because of the steady ________ (grow) of bigger languages. 12. Tight jeans and trousers, short skirts and even sensible flat shoes may all cause _____ (ill). 13. Reduce the amount of it if you suffered from restlessness or ________ (sleep) after taking the medicine. 14. I saw many ______ (Japan) seated in the corner and reading something. 15. You should take more ______(exercise). Don’t always sit at the desk busy doing your _____(exercise). 名词参考答案: , girl 4. existence 5. people’s 7. youth ’s 11. growth 13. sleeplessness , exercises 二代词 1 When the time came for me to say goodbye to my friends in the village, I wanted to reward the old woman for the trouble I had caused _ . 2 I was wondering where I was going to spend the night when I realized that the villagers who had gathered around me were arguing as to who should have the honor of receiving me as a guest in ______ house. 3 The journalists who have seated ______ for half an hour are eager to have a chance to raise a question to Premier Wen Jiabao. 4 This dining hall is four times the size of ______ one. 5 Malaria, the world's most widespread parasitic (寄生虫引起的)disease, kills as many as three million people every year -- almost ____ of whom are under five, very poor, and African. 6 What surprised me most was that he told me his name when I asked him _____ he was. 7 The famous actress said her parents worked happily and were nice and healthy, and some others said it was the same with ________.

江苏省宿迁市宿豫中学2019-2020学年高二(奥赛班)下学期4月月考数学试题

江苏省宿迁市宿豫中学2019-2020学年高二(奥赛班) 下学期4月月考数学试题 学校_________ 班级__________ 姓名__________ 学号__________ 一、单选题 1. 设,则 A. B. C.D. 2. 如果函数的图象如下图,那么导函数的图象可能是() A.B.C.D. 3. 已知复数满足,则复数在复平面内对应的点位于() A.第一象限B.第二象限C.第三象限D.第四象限 4. 曲线在点处的切线与坐标轴所围三角形的面积为() A.B.C. D. 5. 若,则下列不等式成立的是()A.

B. C. D. 6. 若复数,为的共轭复数,则=() A.i B.-i C.D. 7. 设在内单调递增,,则是的() A.必要不充分条件B.充分不必要条件 C.充分必要条件D.既不充分也不必要条件 8. 设为曲线上的点,且曲线在点处切线的倾斜角的取值范围为,则点横坐标的取值范围为() A.B.C. D. 9. 已知对任意实数,有,且时, ,则时() A.B. C.D. 10. 设函数是奇函数()的导函数,,当时, ,则使得成立的的取值范围是()A.B. C.D.

11. 已知二次函数的导数为,,对于任意实数都有,则的最小值为( ) A.2 B.C.3 D. 12. 设函数,若不等式的解集中恰有两个不同的正整数解,则实数的取值范围() A.B.C.D. 二、填空题 13. 已知函数y=的图像在点M(1,f(1))处的切线方程是 ,则=________. 14. 已知函数,当趋向于零时,则分式趋向于___________. 15. 已知复数,满足,则__________. 16. 对于总有成立,则=______________. 三、解答题 17. 已知函数, (1)计算函数的导数的表达式; (2)求函数的值域.

中共宿迁市宿豫区委办公室文件

中共宿迁市宿豫区委办公室文 件 宿豫办发…2007?77号 区委办公室区政府办公室 关于组织开展“农村关爱工程”的 实施意见 (2007年7月30日) 为了认真组织实施以关爱农村劳务输出人员家庭的儿童、老人和妇女为主要内容的“农村关爱工程”,促进农村社会和谐,加快建设社会主义新农村,根据省里的部署要求,现就我区组织开展关爱农村劳务输出人员家庭的儿童、老人和妇女工程提出如下实施意见。

一、指导思想 坚持以邓小平理论和“三个代表”重要思想为指导,全面落实科学发展观,认真贯彻党的十六届五中、六中全会精神和国务院《关于解决农民工问题的若干意见》,围绕让农村劳务输出人员家庭的儿童得到更多关爱、老人得到更好照顾、妇女得到及时扶助的目标。探索建立关爱工作长效机制,努力形成全社会关心帮助农村劳务输出人员家庭的儿童、老人和妇女的良好氛围,为促进农村经济发展和社会和谐,实现“争当全面小康建设先行区”的宏伟目标打牢基础。 二、活动内容 立足于农村劳务输出人员家庭儿童、老人和妇女的实际需要,集中组织开展三大板块的主题活动: (一)开展“春晖行动”,帮助劳务输出人员家庭儿童“托起一片蓝天”。 1、“寄宿制”托管学校达标创建。围绕“开通一部亲情电话,成立一批兴趣小组,建好一个图书阅览室,设立一个心理咨询室,聘请一批心理教师”的“五个一”创建目标,在全区农村中小学校中深入开展“留守儿童”托管学校达标争创活动,为他们提供学习辅导、心理疏导、安

全看护和文化娱乐等服务,争取在9月底前,农村中小学校的“五个一”达标率达到100%,农村高年级“留守儿童”的寄宿率达到90%以上。 2、“大手拉小手”爱心结缘。成立一支以党员干部、中小学教师、“五老”人员为骨干的志愿者服务队,开展“留守儿童代理家长”认亲活动,通过从思想上引、情感上补、物质上帮,为关爱对象建起第二个温暖之“家”,争取在 9月底前,全区生活失助、亲情失落、学业失教的“留守儿童”结对帮扶率达到100%。 3、“七彩夏日”社会实践。选送“留守儿童”代表参加全省“同在蓝天下,携手共成长”夏令营活动,参加全市以“留守儿童”为重点的“未成年人暑期创业文化夏令营”系列活动。与此同时,在全区开展“快乐伙伴”假日营活动,组织部分城乡中小学生与“留守儿童”结成“快乐伙伴”,共同参加社会实践活动,增强他们的自信心和团队意识;开展“平安伴我行”夏令营活动,通过举办法制、安全等知识讲座,提高“留守儿童”法律意识和安全防范意识。 4、“亲情之旅”。组织一批长期未与父母团聚的儿童,与在外务工的父母开展一次亲情交流活动。同时,组织他

全国卷高考英语语法填空专项训练精选

全国卷高考英语语法填空专项训练 语法填空练习一 With the 1________ (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because 2______ air pollution. Air pollution is caused by the following 3_____(reason): about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off 4________ (poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health 5______ to others. 6_______ these, about 10%of air pollution is caused by other reasons. We should take some measures to fight 7______ pollution. New fuel can be used to take 8______place of gas. We can plant more trees. If everybody realizes the 9________ (important) of environment and does something to stop pollution, the problem will 10_________ (solve). 语法填空练习二 We often think of future. We often wonder 1 the world will be like in a hundred years’ time. Think of space. Perhaps a permanent station on 2 moon will 3 (set) up. Perhaps people will be able to visit the moon as 4 _ (visit). Cheap rockets for space travel will have been developed, 5 in space and visiting 6 planets. Great progress will have been made 7 medicine, too. Pollution will have been controlled in a hundred years’ time. 8 the world will have been developed—even Antarctica. We will have used up most of the earth’s land to build our cities, 9 floating cities will have been built. The Japanese have already plans of this kind. And there will be cities 10 the sea. 语法填空练习三 In the United States, there were 222 people 1 (report) to be billionaires in 2003. The 2 (rich)of these is Bill Gates, worth at least $41 billion, who made his money 3 Mr Gates was only 21 years old 4 5 the time he was 31. 6 , there are still some other people who have made lots of money at even 7 (young) ages like Jackie Coogan and Shirley Temple. 8 of these child actors made over a million dollars 9 (act) in movies before they were 14. But 10 youngest billionaire is Albert von Thurn and Taxis of Germany, who, in 2001, inherited a billion dollars when he turned 18. 语法填空练习四 Most Americans don’t like to get advice 1 members of their family. They get advice from “ 2 (strange).” When they need advice, they don’t usually go to people they know. Instead,many of 3 write letters to newspapers and magazines 4 give advice on many different subjects 5 (include) family problems, the use of language, health, cooking, child care, clothes, 6 even on how to buy a house or a car. Most newspapers 7 (regular) print letters from readers with problems. Along with the letters there are 8 (answer)written by people who are supposed to know how to solve such problems. Some of these writers are doctors. 9 are lawyers or educators. But two of the most famous writers of advice are women without special 10 (train) for this kind of work. 语法填空练习五

江苏省宿迁市宿豫中学2021-2022高一化学下学期四月调研试试题(实验班,含解析)

江苏省宿迁市宿豫中学2021-2022高一化学下学期四月调研试试题 (实验班,含解析) 本卷可能用到的相对原子质量:H-1 C-12 N-14 O-16 Na-23 Mg-24 Al-27 P-31 S-32 Cl-35.5 K-39 Ca-40 一、单项选择 1.澳大利亚研究人员开发出被称为第五形态的固体碳,这种新的碳结构称作纳米泡沫,它外 形类似海绵,密度极小,并且有磁性。纳米泡沫碳与金刚石的关系是() A. 同素异形体 B. 同分异构体 C. 同位素 D. 同一物质 【答案】A 【解析】 【详解】A.同素异形体即同种元素组成的不同单质,很明显纳米泡沫碳与金刚石是碳元素组 成的不同单质,因此二者互为同素异形体,A项正确; B.同分异构体是有机化学中分子式相同但结构不同的物质,很明显不符合定义,B项错误; C.同位素是同种元素的不同核素,很明显不符合定义,C项错误; D.纳米泡沫碳和金刚石是不同的物质,D项错误; 答案选A。 2.最近发现一种新微粒O4,有关这种新微粒的说法正确的是() A. 它的结构与P4相同 B. 它的摩尔质量为64 C. 它是由两个氧分子通过分子间作用力结合而成的新微粒 D. 它是氧气的同素异形体 【答案】D 【解析】 【详解】A.每个氧原子需要成2个键,而每个磷原子需要成3个键,因此二者的结构不可能 相同,A项错误; B.摩尔质量的单位是g/mol,B项错误; O是由4个氧原子组成的一个整体,C项错误; C.4

D.4O 和2O 一样,都是由氧元素组成的不同形态的单质,因此互为同素异形体,D 项正确; 答案选D 。 3.下列有关化学用语表示正确的是( ) A. 碳酸钠的电离方程式:Na 2CO 32Na ++CO 32- B. 乙烯的结构简式:CH 2CH 2 C. Mg 2+ 的结构示意图: D. H 2O 的电子式: 【答案】D 【解析】 【详解】A .碳酸钠为盐类,电离方程式为:Na 2CO 3=2Na ++CO 32-,故A 错误; B .乙烯中含有碳碳双键,官能团不能省略,乙烯的结构简式为:CH 2=CH 2,故B 错误; C .Mg 2+ 中质子数为12,外层电子失去2个电子,其结构示意图为: ,故C 错误; D .H 2O 为共价化合物,其电子式为,故D 正确; 故答案为D 。 4.下列物质互为同分异构体的是( ) A. 乙醇和乙酸 B. 和CH 3CH 2CH 2CH 3 C. 12C 与14C D. 金刚石和石墨 【答案】B 【解析】 【详解】A .乙醇和乙酸所含官能团不同,不互为同分异构体,故A 不符合题意; B .和CH 3CH 2CH 2CH 3化学式相同,结构相似而不同,二者互为同分异构体,故B 符合 题意; C .12C 与14C 所含质子数相同,中子数不同,二者互为同位素,故C 不符合题意; D .金刚石和石墨均是碳元素组成的单质,二者互为同素异形体,故D 不符合题意; 故答案为B 。 5.下列反应或过程需要吸收能量的是( )

2020年江苏省宿迁市宿豫区小升初语文模拟试卷及答案解析

2020年江苏省宿迁市宿豫区小升初语文模拟试卷 一.现代文阅读(共2小题) 1.阅读课内语段,完成练习。 桂花雨 中秋节前后,正是故乡桂花盛开的时节。 小时候,我对什么花,不懂得欣赏。父亲总是指指点点地告诉我,这是梅花,那是木兰花……但我除了记些名字外,并不喜欢。我喜欢的是桂花。桂花树的样子笨笨的,不像梅树那样有姿态。不开花时,只见到满树的叶子;开花时,仔细地在树丛里寻找,才能看到那些小花。可是桂花的香气,太迷人了。 故乡靠海,八月是台风季节。桂花一开,母亲就开始担心了:“可别来台风啊!” 母亲每天都要在前后院子走一回,嘴里念着:“只要不来台风,我就可以收几大箩.。 送一箩给胡家老爷爷,送一箩给毛家老婆婆,他们两家糕饼做得多。” 桂花盛开的时候,不说香飘十里,至少前后左右十几家邻居,没有不浸.在桂花香里的。桂花成熟时,就应当“摇”。摇下来的桂花,朵朵完整、新鲜。如果让它开过了,落在泥土里,尤其是被风雨吹落,比摇下来的香味就差多了。 摇花对我来说是件大事,我总是缠着母亲问:“妈,怎么还不摇桂花呢?”母亲说:“还早呢,花开的时间太短,摇不下来的。”可是母亲一看天上布满阴云,就知道要来台风了,赶紧叫大家提前摇桂花。这下,我可乐了,帮大人抱着桂花树,使劲地摇。 摇呀摇,桂花纷纷落下来,我们满头满身都是桂花。我喊着:“啊!真像下雨,好香的雨啊!” 桂花摇落以后,挑去小枝小叶,晒上几天太阳,收在铁盒子里,可以加在茶叶里泡茶,过年时还可以做糕饼。全年,整个村子都浸在桂花的香气里。 我念中学的时候,全家到了杭州。杭州有一处小山,全是桂花树,花开时那才是香飘十里。秋天,我常到那儿去赏桂花。回家时,总要捡一大袋桂花给母亲。可是母亲说:“这里的桂花再香,也比不上家乡院子里的桂花。” 于是,我又想起了在故乡童年时代的“摇花乐”,还有那摇落的阵阵桂花雨。 (1)给文中带点的字注音。 (2)在文中的括号里填上合适的关联词。 (3)《桂花雨》一课以为线索,回忆了“我”童年时代的和,

2020高考英语易错语法点专题九 定语从句(解析版)

2020高考英语易错语法点专题九定语从句(解析版) 1.(2019·全国卷II,62) Now Irene Astbury works from 9 am to 5 pm daily at the pet shop in Macclesfield, _____she opened with her late husband Les. 2.(2019·全国卷III)In the cafe,customers will enjoy themselves in the historical environment_______is created for them. 3.(2019 江苏卷,21 )We have entered into an age _______ dreams have the best chance of coming true. 4.(2019·天津卷,11)Their child is at the stage______ she can say individual words but not full sentences. 5.(2019·新课标III卷)They were well trained by their masters __ ___ had great experience with caring for these animals. 6. (2019·北京卷)The students befitting most from college are those ___ ___ are totally engaged(参与)in academic life. 7.【2018·北京】She and her family bicycle to work, _________ helps them keep fit. A. which B. who C. as D. that 8.【2018·天津】Kate, ________sister I shared a room with when we were at college, has gone to work in Australia. A. whom B. that C. whose D. her 9.【2018·江苏】Self-driving is an area _______ China and the rest of the world are on the same starting line. A. that B. where C. which D. when 10.【2017·北京】The little problems ______ we meet in our daily lives may be inspirations for great inventions. A. that B. as C. where D. when 11.【2017·江苏】In 1963 the UN set up the World Food Programme, one of ______ purposes is to relieve worldwide starvation. A. which B. it’s C. whose D. whom 12.【2017·天津】My eldest son, _______ work takes him all over the world, is in New York at the moment. A. that B. whose C. his D. who 13.【2016·北京】I live next door to a couple ________ children often make a lot of noise. A. whose B. why C. where D. which 14.【2016·江苏】Many young people, most ______were well-educated, headed for remote regions to chase their dreams. A. of which B. of them C. of whom D. of those 15.【2016·浙江】Scientists have advanced many theories about why human beings cry tears , none of ______ has

解析江苏省宿迁市宿豫中学2020┄2021学年高二下学期期中考试物理试题

2020┄2021学年江苏省宿迁市宿豫中学 高二(下)期中物理试卷 一、单项选择题(本题共8小题,每小题3分,共计24分) 1.(3分)如图的各个图线中,表示交变电流的是( ) A. B. C.D. 【考点】:交变电流. 【专题】:交流电专题. 【分析】:电流大小和方向都随时间呈周期性变化的电流叫做交变电流. 【解析】:解:ABD、电流的方向始终为正,没变化,故不是交变电流,故ABD错误; C、电流大小不变,但方向随时间呈周期性变化,故C是交变电流,故C正确; 故选:C. 【点评】:解决本题的关键是知道交变电流的定义及特点. 2.(3分)如图,三只白炽灯泡L1、L2、L3分别与线圈L、电阻R、电容器C串联后接在同一个交流电源上,供电电压瞬时值为u1=U m sinωt,此时三只灯泡的亮度相同.现换另一个电源供电,供电电压瞬时值为u2=U m sin,则三只灯泡的亮度变化是() A. L1变亮,L2不变,L3变暗B. L1变暗,L2不变,L3变亮 C.L1变亮,L2变亮,L3变暗 D. L1变暗,L2变亮,L3变亮

【考点】:电容器和电感器对交变电流的导通和阻碍作用. 【专题】:交流电专题. 【分析】:本题根据电感和电容的特性进行【分析】:电感通低频,阻高频;电容器通高频,阻低频.电阻与电源的频率无关. 【解析】:解:线圈阻交流通直流,通低频阻高频,当交变电流的频率变小时,线圈的感抗变小,通过L1的电流变大,故L1变亮. 电阻与电源的频率无关,当电源频率变小时,电阻所在支路电灯L2的亮度不变. 电容器通交流阻直流,通高频阻低频,当交变电流的频率变小时,电容器的容抗变大,故通过L3的电流变小,故L3变暗.故A正确. 故选:A. 【点评】:重点掌握交流电的频率对电感和电容的影响,知道当交变电流的频率变小时,线圈的感抗变小,电容器的容抗变大. 3.(3分)物理课上,老师做了一个奇妙的“跳环实验”.如图所示,她把一个带铁芯的线圈L 开关S和电源用导线连接起来后,将一金属套环置于线圈L上,且使铁芯穿过套环,闭合开关S的瞬间,套环立刻跳起.某同学另找来器材再探究此实验.他连接好电路,经重复试验,线圈上的套环均未动.对比老师演示的实验,下列四个选项中,导致套环未动的原因可能是( ) A.线圈接在了直流电源上

相关主题
相关文档 最新文档