中考选择题专项训练(无答案)
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1.给空缺处选填语句,最恰当的一项是()云雀猛地从香樟树上飞起,_________,往朝霞万里的高空飞旋。
A.仿佛利箭般离弦B.如同猛虎般出山C.像陀螺样打转转D.好似炮弹样出膛1.C2.给空缺处选填语句,最恰当的一项是( )我站在葡萄架下,欢喜地看着这月亮的眼睛,_________。
A.使夜色显得更加宁静B.抚摸着这宁静的夜C.犹如甘甜的汁液流入心田D.亮了整个宁静的夜2.D3.给空缺处选填语句,最恰当的一项是( )金色的蒲公英烂漫地开着,________,布满了整个山野。
A.像从天而降的精灵B.像密密麻麻的星星C.像星星点点的灯火D.像一群群的小蜜蜂3.B4.给空缺处选填语句,最恰当的一项是()文明旅游的习惯不是与生俱来的,要内化于心、外见于行,________。
A.既需自内而外的自我修炼,也需由外至内的约束监管B.既需自外而内的自我修炼,也需由内至外的约束监管C.不需自外而内的自我修炼,只需由内至外的约束监管D.不需自内而外的自我修炼,只需由外至内的约束监管4.A5.给空缺处选填语句,最恰当的一项是()大雁是有灵性的,它只能选择适宜于它生存的环境,同时,大雁也无法改变它的天性——飞翔,它们原是自由的鸟儿,为了生命的自由和自由的生命,远远地避开人群,________。
A.远远地飞走,甚至不愿回来,飞走B.飞走,远远地飞走,甚至不愿回来C.甚至不愿回来,飞走,远远地飞走D.远远地飞走,飞走,甚至不愿回来5.B6.给空缺处选填语句,最恰当的一项是()去年暑假,爸爸带我去潜水爬山。
_________;山顶上,电视塔高高矗立,煞是雄伟。
A.这里的景色真美!山脚下,温泉河静静流淌,碧波粼粼B.这里的景色真美!山脚下,静静流淌的温泉河,碧波粼粼C.那儿的景色真美!山脚下,温泉河静静流淌,碧波粼粼D.那儿的景色真美!山脚下,静静流淌的温泉河,碧波粼粼6.C7.给空缺处选填语句,最恰当的一项是()春意甚浓,但在北方还是五风十雨,春寒料峭,________,又来了一场沁人心脾的冷雨。
初中地理中考专项训练世界的气候——影响气候的因素(选择题1-100)(含答案解析)未命名一、选择题下图是某区域1月平均气温分布略图,读图,回答下面小题。
1.造成甲、乙两地气温差异的主要因素是A.纬度因素B.海陆位置C.地形地势D.人类活动2.造成乙、丙两地气温差异的主要因素是A.纬度因素B.海陆位置C.地形地势D.人类活动3.甲地所在的大陆位于A.亚欧板块B.美洲板块C.印度洋板块D.太平洋板块读亚欧大陆局部轮廓图,回答下面小题。
4.图中四地,位于“古丝绸之路”的枢纽位置,属于常年干旱少雨的是A.①B.②C.③D.④5.图中,代表①地气候类型的是A.B.C.D.6.影响③地与其它三地降水多少差异的主要因素是A.纬度因素B.海陆因素C.地形因素D.人类活动2015 年 7 月 31 日,北京获得 2022 年第 24 届冬季奥林匹克运动会主办权。
距北京西北 100 多千米的张家口,雪场平均海拔 1000 米以上,降雪期长,成为本届冬奥会的合办地。
左图和右图分别为历届冬奥会举办地分布示意图和北京气温曲线和降水量柱状图。
读图,完成下列各题。
7.历届冬奥会举办地均位于①北半球温带地区②南半球温带地区③-20℃~10℃等温线之间④10℃~20℃等温线之间A.①④B.②③C.①③D.②④8.北京举办冬奥会有利的气候条件是A.冬季气温低,冰雪不易化B.冬季降水少,积雪薄C.西北风强劲,积雪漫天飞D.冬季多风,空气干燥9.张家口比北京降雪期长,主要影响因素是A.纬度位置B.海陆位置C.地形D.植被10.第 24届冬奥会的举办对张家口地区带来的影响是①带动体育产业、旅游业的发展②促进利用当地资源,大规模发展工业③推动交通、通信等基础设施建设④提供大量就业岗位,增加居民收入A.①②B.②④C.①③D.②③一年中最冷月和最热月的平均气温之差为气温年较差。
下图是欧洲部分城市一月和七月气温状况示意图。
读图回答下面小题。
11.关于图中城市气温的描述,正确的是 ( )A.越往东,气温越高B.越往东,气温越低C.越往东,气温年较差越大D.越往东,气温年较差越小12.影响图中城市气温分布特点的主要因素是A.纬度位置B.太阳辐射C.海陆位置D.地形地势读下图,回答下面小题。
选择题——列强的侵略和中国人民的抗争第1课鸦片战争1、(2020·重庆)禁毒是当今世界面临的一项艰巨任务。
早在鸦片战争前,林则徐领导的“虎门销烟”就显示了中国人民禁毒的决心。
“虎门销烟”距今()A.160周年B.170周年C.180周年D.190周年答案:B2、(2020·福建龙岩)“落后就要挨打”、“弱国无外交”,这是近代中国屈辱历史给我们的警示。
在中国近代史上,腐朽的清政府被迫同列强签订的第一个不平等条约是()A.《南京条约》B.《天津条约》C.《黄埔条约》D.《望厦条约》答案:A3、(2020·福建泉州永春县)鸦片战争成为中国近代史的开端,主要是因为()A.中国开始遭到大规模外来侵略B.中国被纳入资本主义世界体系C.中国开始进入半殖民地半封建社会D.它开创了以条约形式掠夺中国的先例答案:C4、(2020·成都)右图是镌刻在“人民英雄纪念碑”上的一幅著名浮雕,指出它表现了中国近代的哪一次重要历史事件?()A.1839年虎门销烟B.1911年武昌起义C.1919年五四运动D.1949年渡江战役答案:A5、(2020·南京)“英商进出口货物缴纳的税款,中国须同英国商定。
”此项规定最早出自()A.《南京条约》B.《瑷珲条约》C.《马关条约》D.《辛丑条约》答案:A6、(2020·武汉)把“虎门销烟”和“开眼看世界的第一人”两个要素综合在一起,我们想到的历史人物只能是()A.林则徐 B.李鸿章 C.康有为答案:A7、(2020·福建晋江)我们之所以怀念林则徐及其领导的禁烟运动,主要是因为()A.他领导的禁烟运动巩固了封建统治B.他领导的禁烟运动延迟了鸦片战争的爆发C.他领导的禁烟运动开启了中国近代的历史D.他领导的禁烟运动表明了中国人民反对外侮的坚强决心答案:D8、(2020·福建泉州南安市)“苟利国家生死以,岂因祸福避趋之,”这个民族利益年看得高于一切的民族英雄是图中()林则徐左宗棠邓世昌蔡伦A B C D答案:A9、(2020·安徽)5.6月26日是联合国大会设立的“世界禁毒日”。
中考复句选择专项训练
以下是一些中考复句选择专项训练的题目,供您参考:
1. 下列句子中,标点符号使用正确的一项是( )
A. 我不知道他喜欢什么?
B. 星期天,妈妈陪我去花鸟市场买了一盆吊兰。
C. 他的进步本来不快,这次却考了个全班第一,他创造了一奇迹。
D. 参加本次会议的有九名专家、教授、博士。
2. 下列句子中没有语病的一项是( )
A. 为了避免交通道路不拥堵,各地纷纷出台交通管理新措施。
B. 这次比赛的获胜,将决定着我们能否顺利进入决赛阶段。
C. 教师要注重培养学生分析问题、提出问题和解决问题的能力。
D. 经过昨夜的一场秋雨,使空气清新了许多。
3. 下列句子中没有语病的一项是( )
A. 在如何提高课堂效率的问题上,老师听取了广泛同学们的意见。
B. 通过开通快速公交,使主城区道路交通拥堵问题得到有效缓解。
C. 成都的春天简直就是一座美丽的大花园。
D. 防止校园欺凌事件不再发生是个系统工程,需要多方面齐心协力完成。
中考语文语文选择题1.下列各句中没有语病的一项是()。
(2 分)A.在探索宇宙的旅程中,我们应当努力提升自己分析问题、解决问题和创新思维的能力。
B.星光璀璨、灯火辉煌,城市的夜景让人心潮澎湃。
C.坚持每天阅读,是提高个人素养,丰富精神生活的重要途径。
D.只要我们坚持不懈,就能克服一切困难,实现自己的梦想。
2.下面是某媒体上刊登的一则新闻。
文中画线的语句有语病,请一一改正。
(4 分)①6 月 10 日,一股爱心的暖流在阳光社区的居民中流淌。
阳光社区靠近繁华的商业街,②社区内居住着许多在商圈工作的本地居民和外来务工人员。
端午节即将来临,③社区内居民的孩子们关心着居委会工作人员的心。
为了让这些孩子也能感受到节日的温暖,社区居委会组织了社区居民向这些孩子们捐赠自己的书籍和玩具的活动。
改正:①②③3.下面各组词语中加点字的读音完全正确的一项是… …(B ) ( 2 分)A.喝彩(hè)伶仃(lín)姹紫嫣红(zhà)B .污秽(huì)戍守(shù)白雪皑皑(ái)C .忏悔(chàn)晨曦(xī)风调雨顺(tiáo)D 、提防(dī)侥幸(jiǎo)丢三落四(là)4 .下列词语中没有错别字的一项是… … (A ) ( 2 分)A .铤而走险相形见绌以身殉职B .出类拔萃南辕北辙声色俱厉C .推心置腹中流砥柱漫不经心D .通宵达旦相提并论焕然一新5.下列各句中,加点的词语解释不恰当的一项是… … (D ) ( 2 分)A .俱往矣,数风流人物(指能建功立业的英雄人物),还看今朝。
(毛泽东《沁园春· 雪》)B .宗师说我火候(指写文章的功夫)已到,自古无场外的举人,如不进去考他一考,如何甘心?(吴敬梓《范进中举》)C .他少年出外谋生,独立支持,做了许多大事。
哪知老境却如此颓唐(衰颓败落)!(朱自清《背影》)D .总之,一切都要为构成完美的图画而存在,绝不容许有欠美伤美的败笔(错误的设计)。
中考语文基础知识《选择题》专项练习题(含答案) 1.下列词语中不属于发音相同,但字形、字义不同的一组是()A.赏心悦目、赏心悦耳、赏心悦目B.游刃有余、有余无力、余音袅袅C.开门见山、开心见诚、开宝见山D.饮水思源、源远流长、水深火热【答案】C“聚精会神”中的“聚”和“精”分别表示()A.动词、形容词B.形容词、名词C.动词、名词D.副词、名词【答案】A3.下列句子中,正确表达“因果关系”的是()A.夏天到了,公园里的草长得特别快。
B.这个生活习惯不好,容易导致患上肥胖病。
C.虽然他很努力,但是成绩并没有提高。
D.他们俩个年龄相同,身高也一样。
【答案】B4.下列句子中没有语病的是()A.我明天还要去上学,还得去参观一个工厂。
B.老师讲得很有意思,可我还是没听懂。
C.他写的诗虽然有些不好,但是表达出来的意思很深刻。
D.这个故事讲的是一个人从小做起,一步一步地走向成功的过程。
【答案】D5.下列各组词语中,没有语病的一组是()A.发出光亮、发出声响、发出气味B.项链、玉石、手镯C.书写、品德、体育D.勤劳、好学、乐观【答案】D6.下列词语中,没有语病的一组是()A.又大又圆、大的圆的、又圆又大B.火辣辣的、刺骨骨的、寒冷冷的C.滴水不漏、一丝不挂、寸草不生D.巨大无比、极小无比、美好无比【答案】A7.下列句子中,无主语的是()A.听了老师的讲解,我们懂得了许多新知识。
B.为了让身体健康,我们每天要进行一定的体育锻炼。
C.下个星期天我们全家去郊游。
D.这里的环境十分优美,还有很多好玩的地方。
【答案】C8.下列句子中,下划线部分的字句中没有语病的是()A.我妈妈喜欢买一些漂亮的衣服,我也是这样。
B.他写作文时喜欢翻阅一些名人的文章,然后才开始写。
C.我哥哥最喜欢的运动是篮球,而我最喜欢的是乒乓球。
D.今天我跑得比昨天快了,这说明我训练得越来越好了。
【答案】C9.下列句子中没有主语的是()A.今天天气很好,我们一家人去了动物园。
备考错题集一、选择题:1. --- My father likes tea _______ nothing in it.---Me, too.A. ofB. withoutC. withD. have2. You should look after _______, classmates.A. yourselvesB. yourselfC. herselfD.himself3. --- A friend in need is a friend indeed.Do you think so?---That ’ s true.I thanked Jim a lot because he _____ last year.A. helped me outB. worked outC. helped me withD. looked out4. --- Could I use your computer for a while? ---Of course you ___. But I ’ ll work on it tonight.A. couldB. canC. willD. should5. --- Does Jeff like talking with his friendson the telephone or mobile phone?---________. He enjoys chatting online.A. BothB. NoneC. EitherD. Neither6.--- I had a fight with Tom. What should Ido?--- You should talk to him ______ you cansay sorry to him.A. althoughB.so thatC.untilD.but7.She thanks her parents for keeping her inschool and ____ her to study.A. pullingB. makingC. watchingD.pushing8. --- What do you think of your math teacher? ---I think he is the best ______ he is very strict with us.A.soB. untilC. thoughD. because9.--- Why are you looking ____ in class allday?---Because I can’t finish my homework until11 every night.A.awakeB. asleepC. sleepingD.sleepy10.--- ______ fine weather! Shall we go fora walk?---That sounds great!A. WhatB. HowC. What aD. How a11.---o you know that Mr. Green passed _____two days ago?--- Yes, he died ______ illness. 22. --- I like Tan Jing very much. Her __ isA. away ofB. on, from . by; with D. off, so sweet.as --- Yes. Her songs _____ very wonderful.12. --- Is Jane the tallest in your class? A. sound; sound B. voice; voice--- Yes, she is taller than _____ girl. C. voice; sound D. noise; soundA. otherB. elseC. the otherD. 23. --- Students shouldn ’ t go to school ____another breakfast. It ’ s bad for their health.13. It will take you ______ time to travel to A. with B. without C. for D. byJapan than to the USA. 24. --- This is such an interesting book thatA. littleB. fewC. lessD. fewer everyone likes to read it.14. The old man found a bag _______ money in --- Yes, but there are few such books _____the rubbish box. in the bookstore now.A. full ofB. fill withC. was full ofD. A. available B. unbelievablefilled of C. reusable D. valuable15. --- Do you know Diaoyu island? 25. It is better to travel 10,000 miles than--- Sure. It _____ China since ancient to read 10,000 books, so it ’ s important totimes. have real ____ with languages, cultures andA. belongs toB. belonged to societies.C. has belonged toD. is belonging to A. communication B. experience16. --- I hear Mr. Black ______ to London on C. knowledge D. influencebusiness. Did he fly there? 26. I wonder if it ’ s going to rain next week.--- Yes. And he will come back tomorrow. If it _____, I have to stay at home.A. is goingB. will flyC. has beenD. A. is B. does C. do D. willhas gone 27. --- Could you tell me how t o ____the17. There are fifty students in his class. bookstore?_____ of them ______ girls. ---Yes, you need to take a bus. If the busA. Two fifth; isB. Two fifths; is ____, I will tell you.C. Two fifths; areD. Two fifth; are A. get to; arrives B. reach; get to18. Mr. Green isn ’ t here. He with his family C. get to; reaches D. arrives,____ home in England. arrivesA. have beenB. has been 28. --- Did you go to the park last Sunday?C. has gone backD. have gone --- ______. But it was too crowded.19. --- I think life _____ is a learning A. No, I didn ’ t B. No, I don ’ tprocess. C. Yes, I went D. Yes, I did--- I agree. We should keep studying all 29. --- When did you get there?the time. --- I arrived there ____5:00 ____a coldA. yourselfB. himselfC. oneselfD. morning.itself A. at; in B. at; on C. on; at D. on; in20. Though born in Los Angeles, Steven 30. --- The books are so nice. Which one canDavidson spent his life ______ in New York. I take?A. mostlyB. wiselyC. normallyD. --- Oh, you can take ____ of them, I ’ llwidely keep none.21. --- You ’ d better ______ your old toys. A. both B. all C. neither D. eitherThey are no use now. 31. --- Jim, can you ____ this word in--- But I want to keep them because they Chinese?bring back sweet memories. --- Yes, I cal ____ a little Chinese.A. bring outB. check outC. clear outD. A. speak; say B. say; speakclean up C. tell; speak D. talk; say32.---How could I improve my spoken English,Sally?--- While speaking English, you needn’worry about ___ you ’ ve made mistakes inA. ifB. howC. whetherD. what33. --- Excuse me, could you tell me ____nehere?---Of course. Besides Renmin Library liean amusement park.A.where is a place to have funB.where a place is to have funC.where is there a place to have funD.where there is a place to have fun34. The machines are different_____ size athe red machine is bigger than ______.A. from; any other oneB.from; any otheonesC. in; any other oneD. in; any otherones35. Last summer they went to several _____countries ________ Canada.A. west; includeB. western; includingC.western, include D. west; including36.I have the same opinion _____ you.A. asB. forC. atD. with37.---How are you _______ your schoolwork?---Quite well.A. get on withB. getting on withC. get on well withD. getting on wellwith38. They’ll ____ the subway to the spacemuseum. It ’ ll _____ them half an hour.A. take bringB. take; takeC.bring; take D. bring; bring39. --- Where ________?---I have been looking for you everywhere.A. have you goneB. have you beenC. do you doD. did you do40.--- Are the two answers right?---No, ________ correct.A. no one isB. both areC. none isD. neither is41. He was ____ to see an old friend of _____in the street.A. surprising; himB. surprised; hisC. surprising; hisD. surprised; him42. Why don’ t you ______ your daughter1 / 3Don’ t always compare her _____other children.A. think more for; toB.think more for; withB. think more of; to D. think more of; with43. The door is ______, but it ’ s cold outside.Can you keep it _______?A. open; closeB. open; closedC. opened; closeD. opened; closed44. I can do _____ I love to help others.A. thatB. whichC. whatD. where45.Not only Mr. and Mrs. Jones but also their son_____ there twice.A. have goneB. have beenC. has goneD. has been46. I am sorry, I ____where I dropped my notebook.A. am sureB. have no ideaC. forgetD. make sure47. It ’ s really a difficult problem. Idon’t know ____ next.A. how I should doB. how to doC. what I should do itD. what to do48. I will give you a hand _____ you want.A. whateverB. wheneverC. whereverD. however49. ---Have you ever read the book?--- Yes, I _____ it when I was a kid.D. will A. have read B. read C. am readingread50.--- Is Mr. Smith still in Shanghai?---Yes, he _____ there for two months.A. has beenB. has goneC. has been toD. has gone to51.I ’ ll miss the train if the bus arrives_______.A. latelyB. lateC. laterD. morelater52.Peter and Tom will come very soon, sowe’ d better wait._______A. a little longerB. more longerC. longD. as longer53. We don ’ t have enough time to finish thework, ______ to go to the cinema.A. much moreB. many lessC. a lot moreD. a lot less54. Do you know _______ yesterday evening? A. what he happenedB. what the matter is with himC. what happened to himD. what did he happen55. He would allow John ____ his answers ____these difficult questions.A. to copy; toB. to write; ofC. copy; toD. write; of56. Smog used to _____ the city.A. hang outB. hanging overC. hang overD. hang up57. Jane spent two hours _______ her aunt.A. to write toB. write toC. writing downD. writing to58. I find this computer game _____ to play.A. enough easyB. easy enoughC.enough easily D. easily enough59. What ______ so much pressure?A. causeB. causedC. to causeD.causing60. He left very angrily,so he left the roomwithout _______.A. some wordsB. no wordsC. saying somethingD. saying anything61. Let ’ s go for a walk ______ the moonlight.A. underB. inC. onD. of62.--- When ____ you _____ the letter?---The day before yesterday.A. did; receiveB. have; receivedC.do; receive D. will; receive63.When _____ your father _____ to make acake?A. has; beginB. has; beganC. did; beginD. did; began64. Have you been to Changsha ________?A. beforeB.agoC. in the pastD.by65._____ my father ______ my mother is ableto drive a car. However, they are going to buyone.A. Neither; norB. Both; andC. Either; orD. Not only; but also66. ---_______ did you start to collect themovie star’ s photos?--- When I was ten years old.A. How longB. How soonC. How oftenD. When67.---I wonder if I can learn English well.---_______. All things are difficultbefore they are easy.A. I ’ m afraid soB. You are slowC. It takes timeD. I t ’ s a pieces ofcake68.--- The woman asked me _______.---A map is helpful.A. if the park is openB. when the parkclosedC. where the park isD.how she got to thepark69. Hurry up! Time is not enough. You must_____ your clothes quickly.A. wearB. try onC. put onD. dress70.My mother always takes pride _____everything _____ I do.A. of; wellB. in; wellC. of; goodD. in; good71. A number of students _____ in the classroomand the number of the students inour class _____60.A. is; isB. is; areC. are; areD. are; is72. --- Are you afraid of ______ at home,Linda?---I ’ ve grown up.A. aloneB. being aloneC. lonelyD. beinglonely73. The story of TomSawyer _____ in Missouri,America, in the 19th century.A. had happened.B. was happeningC. has happenedD. happened74. Mr. Brown always makes his class _____ andkeeps his students _____ in class.A. alive; interestingB. lively;interestingC. alive; interestedD. lively;interested75. I bought this watch _____ price.A. at a lowB. with a lowC. at a cheapD. with a cheap76.The teacher asked the students to stop_____ and _____ him.A. talking; listening toB. to talk; tolisten toC. talking;to listen toD. to talk;listening to77. --- Would you like some more rice?--- No, thanks.I ’ve had _______.A. full enoughB. enough fullC. enoughD. full78. Judy wants to get her hair ____ in thehairdresser ’ s.A. cutB. cuttingC. to cutD. be cut79. My parents ask me to be back ______ 10 p.mon weekend nights.A. untilB. inC. onD. by80. --- How well did Sally do in writing?---Among the students, she made the ___mistakes.A. fewerB. fewestC. lessD. least81. Her brother ______ be at home now, becaushe was seen playing basketball in the stadiumjust now.A. can ’tB. needn’ tC. mustn’ tD.shouldn ’ t82.Students and teachers have a way that_____ for both of them.A. passesB. choosesC. worksD. offers83. ---How am I supposed to go to Beijing?---You _____ go there by plane. It is thefastest way.A. are expected toB.should be supposetoC. should expect toD. supposed to84. ---Jim along with his parents ____gointo visit Beijing in a week.---I wish them to have a nice trip!A. isB. areC. wasD. were85.--- What do you think of your family rules?---They ’ re terrible. I___to make my owndecisions.A. allowB. am allowedC. was allowedD. should be allowed86. --- How I regret ____ with my best friendLily!--- You should say sorry to her at once.A. argueB. arguedC. arguingD.argue87.二、词汇:1. Thanks for getting me such a specia_______(train) dog.2. Could you please ______ ( not talk ) bacto your mother?3. Most parents believe doing chores helps2 / 3to develop children’ s _________( independent)4.Now people like wearing clothes_______(make) of cotton.5.The news caused great _______ ( excite )among his classmates.6.We should play a role in p______ theanimals.7.--- Is the little baby in the photo me,Dad?---It is. Now you _________ ( grow ) intoa young man. Where does the time go?8.We _________(realize) the importance oflow-carbon life and will take actionsright now.9. Edison is one of the greatest i_________in the world.10.My aunt ________( write ) more than tenbooks since ten years ago.11.We _______(have ) the piano since last October.We_________ ( buy ) it from Mr.Li when he moved to New York last year.12. The teacher told me to pay attentionto_______ ( memory ) sentence patterns quickly.13. The thief ________(catch) by the police at last.14. Many beautiful flowers ____________(buy)for the teachers last Sunday.15. --- What ___________(give) to thevillage school as present last month? ---Some new computers.16.His cousin will have an i______ jobon Xinayang Daily next Tuesday.17.Litter i________ our environment.18.Linda, the greatest tennis player, isthe p______ of our country.19. You’d better r_______ some advice fromyour teacher.20.For the failure, the man _____(lie) inbed.21.The secret to language learning is tor_____ what you have learned after class.22. He doesn’ t s_____ to have many friends.He always comes and goes alone.23.His parents were glad to see their daughtera______er dream.24. No matter how many difficulties we have, I believe all problems can _____(solve) inthe end.25.At the meeting, Amy________(agree) with Mr. Liu about this wrong activity.26.To know happiness well, one must first experience _________(sad)27. A decision will be made when everyone is in a_____________.28. The d________ of radium was one of the greatest achievements in history.29. --- How could you hit such a lovely cat?It ’s so c__________---Sorry, I am wrong.30.三、翻译句子:1. ---My life_____________________________ 自从我们成婚以来就努力改变我--- But she still failed to change you.( get )2. --- Do you like the photo very much,Alice?--- Yes. It _______________________ (remind )使我想起我们一同度过的那些最快乐的日子3. --- Have_______________________________?你以前考虑放弃这支钢笔It is so old.---No, never. ( part )4.--- How do you like Bijing, Tony?---It ’ s great.I think _______________________( be )它比任何一个我已经去过的城市都漂亮5.I ’ m glad______________________________ 你对打篮球是仔细的(allow)6.I______________________________tomorrow 我希望我能修电脑(repair)7.The great_______________________________so far. ( invent )发明家发了然好多发明8.It _______ 听说有 wolves in this forest.(say)3 / 3。
中考英语单项选择(50题)专项练习含解析含答案一、选择题1.I just heard ________ bank where Julie works was robbed by ________ gunman wearing a mask.A.the; / B.a; / C.the; a D.a; the2.—What would you like to be when you grow up? —host like Zhu Jun.A.A B.An C.The D./3.This is ______ unusual course that is taught in ______ university, but it’s of no use to the real life.A.an, a B.an, an C.a, an D.a, a4.Cao Dewang, ________ business man, plan to donate 10 billion yuan to build a public university.A.a B.an C.the D./二、选择题5.The teacher shared the photos of our school trip on her WeChat Moments. We can see them for ________.A.herself B.himself C.ourselves D.themselves 6.BFSU is not far from Peking University, so you can easily visit ________ in a day.A.both B.all C.either D.neither7.The shop assistant in Xinhua Bookstore recommended me the four great classical Chinese novels, but ________ was to my taste.A.all B.neither C.nothing D.none三、选择题8.A ________ is a person who is travelling or visiting a place.A.stranger B.tourist C.guide D.customer 9.—We have entered a world where robot operations become true with 5G technology.—Hard to believe! Scientists are full of ________ which leads to great changes in our life. A.instruction B.instrument C.invention D.introduction 10.—The sweater is not the right ________ for me.—Well, shall I get you a bigger one or a smaller one?A.price B.color C.size D.material(材料)四、选择题11.—I really can’t believe such a wise man has made so silly a mistake.—Don’t you know ________ sense is worth more th an knowledge?A.general B.usual C.special D.common12.In the USA, many people use decorations to make their yards more ________.A.live B.lively C.alive D.living13.— What language is that guy speaking? I can hardly catch a __________ word!— Neither can I. He’s from India. So I guess it’s Hindi.A.silent B.single C.simple D.similar五、选择题14.Last week, Oprah Winfrey had an interview ________ Harry and Meghan.A.with B.to C.about D.on15.We have a party ________ the evening of October 31.A.in B.at C.on D.by 16.Everyone was touched ________ words after they watched the film Hi, MOM 《你好,李焕英》directed by Jia Ling.A.under B.across C.beyond D.against六、选择题17.Far water does not ________ near fire.A.put up B.put away C.put out D.put in七、选择题18.Our Chemistry teacher always tells us we ________ be too hardworking before the exams. A.mustn’t B.shouldn’t C.needn’t D.can’t八、选择题19.—________ have you had this computer?—For two months.A.How much B.How long C.How far D.How often九、选择题20.Now waste from daily life in the city of Suzhou ________ to be separated into four different groups.A.is requiring B.is required C.was required D.required 21.Different kinds of robots________in the coming robot show in our city.A.display B.are displayed C.will display D.will be displayed 十、选择题22.My washing machine ___________this week, so I have to wash my clothes by hand. A.was repaired B.is repairedC.is being repaired D.has been repaired23.Social media, like WeChat, ________ the way of communication nowadays.A.are changing B.changeC.changed D.were changing24.Sitting cross-legged in a manner in which the bottom of a foot ______ toward an Arab is a serious insult.A.had pointed B.pointed C.have pointed D.is pointing25.-- I am afraid I can’t help you with your proj ect. I ________ a model these days.-- It doesn’t matter. I will finish it by myself.A.make B.will be making C.am making D.have made26.------ What’s wrong with you, Kate?------ The shoes don’t fit me properly. They_____ my feet.A.have hurt B.are hurting C.had hurt D.are hurt 27.Xifeng Street is closed today because workers _______ some repairs.A.make B.made C.are making D.were making 28.—Tom, where is your father?—He ________ my bike.A.is repairing B.repairs C.has repaired D.will repair 29.—May I speak to Mr. Brown?—I am sorry. He _______ an important meeting in his office at the moment.A.has B.had C.is having D.will have十一、选择题30.----Would you like to lend me some money?----I’d love to, _______ I left my purse at home.A.so B.and C.or D.but31.— Excuse me. Do you have a table for two?—I’m sorry, there aren’t any seats now. Would you mind waiting a while?A.so B.or C.and D.but32.Set down your pens when you hear the bell rings, ____ you’ll be against the rules.A.and B.but C.so D.or十二、选择题33.—I’ve just received a Wechat message—“ttyl”. Do you know ________?—It stands for “talk to you later”.A.how does it mean B.how it meansC.what does it mean D.what it means十三、选择题34.My father never says he is good at cooking, but in fact he is. He always cooks delicious meals for us, that is, ________ .A.no pain, no gain B.actions speak louder than words C.practice makes perfect D.a friend in need is a friend indeed十四、选择题35.— Are you feeling any better now after taking the medicine?—________. I’m feeling even worse.A.You got it B.Never mind C.Sorry to hear that D.Quite the opposite 36.—Are you going to offer some masks and alcohol wet wipes (酒精湿巾) to the people in the village?—________ They are in great need of these things.A.What a shame! B.Why not? C.Why me? D.What's wrong?十五、选择题37.—Mum, my computer doesn’t work. It needs_________ .—OK. I will have it _________.A.repairing; repaired B.to repair; repairC.be repaired; repairing D.being repaired; to repair38.The film _______ real-life events ________ by Li An. It’s moving.A.based upon, directed B.based upon, was directedC.was based upon, directed D.was based upon, was directed39.My brother would rather spend time _________ in the library _________ talk with friends on WeChat.A.read; in B.reading; in C.reading; than D.to read; than 40.Helen was made the task in two days.A.finish B.to finishing C.finished D.to finish41.My watch doesn’t work. I must have it ________.A.Repairing B.to repair C.repair D.repaired十六、选择题42.Since Tencent released Wechat, it ________ one of the most popular apps in the world. A.became B.has become C.has been D.was十七、选择题43.---I didn’t expect that John would be absent from my last Sunday’s birthday party.--- As far as I know, he ______ to see his parents in the countryside on Sundays.A.goes B.wentC.has gone D.had gone44.With the application of 5G technology __________ profound changes in almost all fields throughout the world.A.will come B.are coming C.comes D.come45.Loo k at the pride on Tom’s face. He ________ to have been praised by the manager just now. A.seemed B.seems C.had seemed D.is seeming十八、选择题46.—Do you know the boy ________is talking to Mr Zhang?—Yes. He is our monitor.A.which B.who C.whose D.whom 47.Nanjing Yangtse River Bridge was built in the 1960s is now under repair.A.who B.whose C.which D.what十九、选择题48.— Will little John arrive on time?—I’m afraid not, ________ the sun rises in the west.A.if B.although C.until D.unless49.I go jogging every morning, ________ it is very hot outside.A.so B.but C.although D.because 50.—The local snack tastes spicy and sweet.—Well, ___________ you are here, why not have a try?A.since B.because C.though D.unless【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【详解】考查冠词。
2021年中考数学《一轮专题训练》—选择题专项:菱形的性质与判定综合(二)1.如图,菱形ABCD中,E,F分别是AD,BD的中点,若EF=5,则菱形ABCD的周长为()A.20 B.30 C.40 D.502.已知菱形的周长为8,两邻角的度数比为1:2,则菱形的面积为()A.8B.8 C.4D.23.如图,在菱形OABC中,点B在x轴上,点A的坐标为(2,2),将菱形绕点O 旋转,当点A落在x轴上时,点C的对应点的坐标为()A.(﹣2,﹣2)或(2,﹣2)B.(2,2)C.(﹣2,2)D.(﹣2,﹣2)或(2,2)4.如图,菱形ABCD中,对角线AC,BD相交于点O,E为AB的中点.若菱形ABCD 的周长为32,则OE的长为()A.3 B.4 C.5 D.65.如图所示的木制活动衣帽架是由三个全等的菱形构成,根据实际需要可以调节AE间的距离.若AE间的距离调节到60cm,菱形的边长AB=20cm,则∠DAB的度数是()A.90°B.100°C.120°D.150°6.如图,菱形ABCD的边长为13,对角线AC=24,点E、F分别是边CD、BC的中点,连接EF并延长与AB的延长线相交于点G,则EG=()A.13 B.10 C.12 D.57.如图,AD是△ABC的中线,四边形ADCE是平行四边形,增加下列条件,能判断▱ADCE 是菱形的是()A.∠BAC=90°B.∠DAE=90°C.AB=AC D.AB=AE8.如图,四边形ABCD的两条对角线相交于点O,且互相平分.添加下列条件,仍不能判定四边形ABCD为菱形的是()A.AC⊥BD B.AB=AD C.AC=BD D.∠ABD=∠CBD 9.如图,要判定▱ABCD是菱形,需要添加的条件是()A.AB=AC B.BC=BD C.AC=BD D.AB=BC 10.如图,在四边形ABCD中,对角线AC,BD相交于点O,AO=CO,BO=DO.添加下列条件,不能判定四边形ABCD是菱形的是()A.AB=AD B.AC=BD C.AC⊥BD D.∠ABO=∠CBO 11.如图,△ABC中,DE∥BC,EF∥AB,要判定四边形DBFE是菱形,还需要添加的条件是()A.AB=AC B.AD=BD C.BE⊥AC D.BE平分∠ABC 12.如图,在▱ABCD中,对角线AC,BD相交于点O,添加下列条件不能判定▱ABCD是菱形的只有()A.AC⊥BD B.AB=BC C.AC=BD D.∠1=∠2 13.下列说法中不正确的是()A.四边相等的四边形是菱形B.对角线垂直的平行四边形是菱形C.菱形的对角线互相垂直且相等D.菱形的邻边相等14.如图,四边形ABCD的对角线相交于点O,且点O是BD的中点,若AB=AD=5,BD=8,∠ABD=∠CDB,则四边形ABCD的面积为()A.40 B.24 C.20 D.1515.如图,四边形ABCD的四边相等,且面积为120cm2,对角线AC=24cm,则四边形ABCD的周长为()A.52cm B.40cm C.39cm D.26cm16.过矩形ABCD的对角线AC的中点O作EF⊥AC,交BC边于点E,交AD边于点F,分别连接AE、CF.若AB=,∠DCF=30°,则EF的长为()A.2 B.3 C.D.17.如图,矩形ABCD中,O为AC中点,过点O的直线分别与AB,CD交于点E,F,连接BF交AC于点M,连接DE,BO.若∠COB=60°,FO=FC,则下列结论:①FB⊥OC,OM=CM;②△EOB≌△CMB;③四边形EBFD是菱形;④MB:OE=3:2.其中正确结论的个数是()A.1 B.2 C.3 D.418.如图,矩形ABCD的对角线AC、BD相交于点O,CE∥BD,DE∥AC,若AC=4,则四边形CODE的周长()A.4 B.6 C.8 D.1019.如图,在菱形ABCD中,∠D=120°,AB=2,点E在边BC上,若BE=2EC,则点B到AE的距离是()A.B.C.D.20.如图,边长为2的菱形纸片ABCD中,∠A=60°,将该纸片折叠,EF为折痕,点A、D分别落在A′、D′处.若A′D′经过点B,且D′F⊥CD,则DF的长为()A.2﹣2 B.4﹣2C.D.参考答案1.解:∵E,F分别是AD,BD的中点,∴EF是△ABD的中位线,∴EF=AB=5,∴AB=10,∵四边形ABD是菱形,∴AB=BC=CD=AD=10,∴菱形ABCD的周长=4AB=40;故选:C.2.解:如图,∵两邻角度数之比为1:2,两邻角和为180°,∴∠ABC=60°,∠BAD=120°,∵菱形的周长为8,∴边长AB=2,∴菱形的对角线AC=2,BD=2×2sin60°=2,∴菱形的面积=AC•BD=×2×2=2.故选:D.3.解:∵菱形OABC中,点B在x轴上,点A的坐标为(2,2),∴AO==4,tan∠AOB=,即∠AOB=60°,又∵AO=AB,∴△AOB是等边三角形,分两种情况讨论:如图所示,当点A在x轴正半轴上时,过C作CD⊥AO于D,则OD=CO=2,CD=,∴点C的坐标为(﹣2,﹣2);如图所示,当点A在x轴负半轴上时,过C作CD⊥AO于D,则OD=CO=2,CD=,∴点C的坐标为(2,2);综上所述,点C的对应点的坐标为(﹣2,﹣2)或(2,2),故选:D.4.解:∵四边形ABCD是菱形,∴AB=BC=CD=AD,AC⊥BD,∴∠AOB=90°,∵菱形ABCD的周长为32,∴AB=8,∵E为AB边中点,∴OE=AB=4.故选:B.5.解:连结AE,∵AE间的距离调节到60cm,木制活动衣帽架是由三个全等的菱形构成,∴AC=20cm,∵菱形的边长AB=20cm,∴AB=BC=20cm,∴AC=AB=BC,∴△ABC是等边三角形,∴∠B=60°,∴∠DAB=120°.故选:C.6.解:连接BD,交AC于点O,如图:∵菱形ABCD的边长为13,点E、F分别是边CD、BC的中点,∴AB∥CD,AB=BC=CD=DA=13,EF∥BD,∵AC、BD是菱形的对角线,AC=24,∴AC⊥BD,AO=CO=12,OB=OD,又∵AB∥CD,EF∥BD,∴DE∥BG,BD∥EG,∴四边形BDEG是平行四边形,∴BD=EG,在△COD中,∵OC⊥OD,CD=13,CO=12,∴OB=OD==5,∴BD=2OD=10,∴EG=BD=10;故选:B.7.解:添加∠BAC=90°时,∵AD是△ABC的中线,∴AD=BC=CD,∴四边形ADCE是菱形,选项A正确;添加∠DAE=90°,∵四边形ADCE是平行四边形∴四边形ADCE是矩形,选项B错误;添加AB=AC,可得到AD⊥BC,∴∠ADC=90°,∴四边形ADCE是矩形,选项C错误;添加AB=AE,∵AE=AB,AB>AD,∴AE>AD,故不能选项D不能判定四边形ADCE是菱形;故选:A.8.解:∵四边形ABCD的两条对角线相交于点O,且互相平分,∴四边形ABCD是平行四边形,∴AD∥BC,当AB=AD或AC⊥BD时,均可判定四边形ABCD是菱形;当AC=BD时,可判定四边形ABCD是矩形;当∠ABD=∠CBD时,由AD∥BC得:∠CBD=∠ADB,∴∠ABD=∠ADB,∴AB=AD,∴四边形ABCD是菱形;故选:C.9.解:根据邻边相等的平行四边形是菱形,可知选项D正确,故选:D.10.解:∵AO=CO,BO=DO,∴四边形ABCD是平行四边形,当AB=AD或AC⊥BD时,均可判定四边形ABCD是菱形;当∠ABO=∠CBO时,由AD∥BC知∠CBO=∠ADO,∴∠ABO=∠ADO,∴AB=AD,∴四边形ABCD是菱形;当AC=BD时,可判定四边形ABCD是矩形;故选:B.11.解:当BE平分∠ABC时,四边形DBFE是菱形,理由:∵DE∥BC,∴∠DEB=∠EBC,∵∠EBC=∠EBD,∴∠EBD=∠DEB,∴BD=DE,∵DE∥BC,EF∥AB,∴四边形DBFE是平行四边形,∵BD=DE,∴四边形DBFE是菱形.其余选项均无法判断四边形DBFE是菱形,故选:D.12.解:A、正确.对角线垂直的平行四边形的菱形.B、正确.邻边相等的平行四边形是菱形.C、错误.对角线相等的平行四边形是矩形,不一定是菱形.D、正确.可以证明平行四边形ABCD的邻边相等,即可判定是菱形.故选:C.13.解:A.四边相等的四边形是菱形;正确;B.对角线垂直的平行四边形是菱形;正确;C.菱形的对角线互相垂直且相等;不正确;D.菱形的邻边相等;正确;故选:C.14.解:∵AB=AD,点O是BD的中点,∴AC⊥BD,∠BAO=∠DAO,∵∠ABD=∠CDB,∴AB∥CD,∴∠BAC=∠ACD,∴∠DAC=∠ACD,∴AD=CD,∴AB=CD,∴四边形ABCD是菱形,∵AB=5,BO=BD=4,∴AO=3,∴AC=2AO=6,∴四边形ABCD的面积=×6×8=24,故选:B.15.解:如图,连接AC、BD相交于点O,∵四边形ABCD的四边相等,∴四边形ABCD为菱形,∴AC⊥BD,S四边形ABCD=AC•BD,∴×24BD=120,解得BD=10cm,∴OA=12cm,OB=5cm,在Rt△AOB中,由勾股定理可得AB==13(cm),∴四边形ABCD的周长=4×13=52(cm),故选:A.16.解:∵矩形对边AD∥BC,∴∠ACB=∠DAC,∵O是AC的中点,∴AO=CO,在△AOF和△COE中,,∴△AOF≌△COE(ASA),∴OE=OF,又∵EF⊥AC,∴四边形AECF是菱形,∵∠DCF=30°,∴∠ECF=90°﹣30°=60°,∴△CEF是等边三角形,∴EF=CF,∵AB=,∴CD=AB=,∵∠DCF=30°,∴CF=÷=2,∴EF=2.故选:A.17.解:连接BD,∵四边形ABCD是矩形,∴AC=BD,AC、BD互相平分,∵O为AC中点,∴BD也过O点,∴OB=OC,∵∠COB=60°,OB=OC,∴△OBC是等边三角形,∴OB=BC=OC,∠OBC=60°,在△OBF与△CBF中∴△OBF≌△CBF(SSS),∴△OBF与△CBF关于直线BF对称,∴FB⊥OC,OM=CM;∴①正确,∵∠OBC=60°,∴∠ABO=30°,∵△OBF≌△CBF,∴∠OBM=∠CBM=30°,∴∠ABO=∠OBF,∵AB∥CD,∴∠OCF=∠OAE,∵OA=OC,易证△AOE≌△COF,∴OE=OF,∴OB⊥EF,∴四边形EBFD是菱形,∴③正确,∵△EOB≌△FOB≌△FCB,∴△EOB≌△CMB错误.∴②错误,∵∠OMB=∠BOF=90°,∠OBF=30°,∴MB=,OF=,∵OE=OF,∴MB:OE=3:2,∴④正确;故选:C.18.解:∵CE∥BD,DE∥AC,∴四边形CODE是平行四边形,∵四边形ABCD是矩形,∴AC=BD=4,OA=OC,OB=OD,∴OD=OC=AC=2,∴四边形CODE是菱形,∴四边形CODE的周长为:4OC=4×2=8.故选:C.19.解:过点B作BH⊥AE于点H,过点E作EF⊥AB交AB的延长线于点F,∵菱形ABCD中,AB=2,∴BC=2,∵BE=2EC,∴BE=,CE=,∵∠D=120°,∴∠ABE=120°,∴∠EBF=60°,∴BF=BE=,EF=,∴AF=AB+BF=2+=,∴AE===,∵S△ABE=AB•EF,∴BH===.故选:A.20.解:如图,延长FC、A′D′相交于点G,∵菱形ABCD中,∠A=60°,∴∠BCD=∠A=60°,∠D=180°﹣60°=120°,由翻折的性质得,∠A′D′F=∠D=120°,FD′=FD,∴∠FD′G=180°﹣∠A′D′F=180°﹣120°=60°,∵D′F⊥CD,∴∠G=90°﹣∠FD′G=90°﹣60°=30°,∴∠CBG=∠BCD﹣∠G=60°﹣30°=30°,∴∠CBG=∠G,∴BC=CG,在Rt△FD′G中,tan∠G=,∵FG=FC+CG=FC+BC=FC+CD=FC+FD+FC=2FC+FD,∴tan30°=,即,∴FD=()FC,∵FD+FC=2,即(+1)FC+FC=2,解得:FC=4﹣2,∴FD=2﹣FC=2﹣2.故选:A.。
2023届地理中考复习:七年级上册选择题专项提分训练经过科学家的精密测量,发现地球是一个不规则的球体,下表为“地球半径基本数据”,读表回答1-4题。
半径概念长度极半径从地心到北极或南极的距离6357千米赤道半径从地心到赤道的距离6378千米平均半径地心到地球表面所有各点距离的平均值6371千米1. 地球赤道半径比极半径略长()A.10千米B.21千米C.35千米D.46千米2. 从表中的数据得出地球形状跟下图最符合的是()A.B.C.D.3. 读北半球夏至日光照图,关于B点的说法正确的是()A.地方时为7点B.正值日落时刻C.经度为60°E D.全年昼长夜短4. 为了满足街道和建筑物都有较好的光照条件,下图设计正确的是()A.B.C.D.小明去高级中学参观地理实验室,其行进路线如图所示。
读图,完成5-6题。
5. 他行进路线方向的变化()A.东北→正东→正北B.正北→东北→西北C.正北→正东→西北D.东北→正东→西北6. 图中小明家距离高级中学大约3厘米,比例尺为1:100000,则小明家距离高级中学的实际距离约为()A.300米B.300千米C.30千米D.3千米7. 读下图,该地图可用于()①查询某地的具体地址②分类查询某地周边公共设施③选择去某地的公交换乘方式和路线④查询某两地之间的路程⑤展现地理环境的变化A.①②③B.②③④C.①②③④D.①②③④⑤8. 王思参加北海公园地理实践活动,出发前通过电子地图查找了路线,活动中拍摄了很多照片.左图为“北海公园局部图”,右图为“白塔景观照片”,读下图,与传统地图相比,电子地图的优点是()A.信息量小B.便于更新C.图幅较大D.内容不变读下图,完成9-11题。
9. 读某地等高线地形图,下列说法正确的是( )A.从甲处攀登山峰最近、最省力B.从乙处攀登山峰较远、最省力C.从丙处攀登山峰较远、最费力D.从丁处攀登山峰最远、最省力10. 此图中山顶的海拔高度是()米A.320 B.335 C.340 D.不确定11. 在分层设色地形图上,平原的颜色一般是()A.黄色B.绿色C.褐色D.蓝色读等高线地形图,完成12-13题。
1 / 8 期末选择题专项练习
1.下列物质不属于溶液的是
A .蒸馏水
B .生理盐水
C .医用酒精
D .蔗糖水
2.下列物质与空气充分混合后遇明火,可能发生爆炸的是
A .氦气
B .面粉
C .二氧化碳
D .氮气
3.目前常用的1元硬币(如右图),其材质为
A. 纯铁
B. 钛合金
C. 钢芯镀铜
D. 钢芯镀镍
4.地壳中含量最多的金属元素是
A .氧
B .铁
C .硅
D .铝 5.下列图标中,表示“禁止放易燃物”的是
6.下列变化,吸收热量的是
A .木炭燃烧
B .氢氧化钠固体溶于水
C .硝酸铵固体溶于水
D .金属镁与稀盐酸反应
7.菱铁矿的主要成分是FeCO 3。
下列有关说法正确的是
A .菱铁矿是铁的合金
B .FeCO 3是含有氧元素的化合物
C .FeCO 3中铁的化合价为+3
D .菱铁矿中铁元素的质量分数为48.3%
8.X 、Y 、Z 三种金属中,只有Z 在自然界主要以单质形式存在,如果把Y 放入X 的硝酸盐溶液中,
Y 表面有X 析出。
据此判断这三种金属的活动性由强到弱的顺序为
A .Z 、Y 、X
B .Y 、X 、Z
C .X 、Y 、Z
D .Z 、X 、Y
9.小明用三根相同的无锈铁钉进行铁制品锈蚀条件的探究(如图),一周后观察。
下列说法错误的是
A .①中的铁钉明显生锈,①和①中的铁钉无明显变化
B .①中铁钉的甲、乙、丙三处,丙处锈蚀最严重
C .①中加入的蒸馏水要事先煮沸,目的是除去水
中溶解的氧气
D .探究发现铁生锈的主要条件是铁与空气和水直接接触
10.光合作用可表示为:二氧化碳+水
淀粉+氧气。
根据以上信息,下列关于淀粉组成的说法中正确的是
A .只含碳、氢元素
B .含碳、氧、氢三种元素
C .含有碳、氢元素,可能含有氧元素
D .无法确定
11.下列有关二氧化碳的说法正确的是
A .二氧化碳灭火器可用来扑灭贵重设备等物的失火
B .只有二氧化碳会导致温室效应
C .喝了汽水会打嗝,说明温度升高,二氧化碳气体溶解度会增大
D .二氧化碳有毒,会使人窒息
12
物质 区别方法 A 硬铝和铝 相互刻画
A
B C D。