2021年山東省菏澤市中考化學(xué)試卷

1、2020-2021學(xué)年廣東省廣州市黃浦區(qū)港灣中學(xué)八上期中英語試卷（聯(lián)考）答案參照秘密級管理啟用前試卷類型：A菏澤市二O二一年初中學(xué)業(yè)水平考試（中考）化學(xué)試題注意事項：1.本試卷共4頁滿分50分，考試時間60分鐘。2.考生須在答題卡規(guī)定的相對應(yīng)的答題區(qū)域作答，選擇題須用2B鉛筆填涂，非選擇題答案用0.5毫米的黑色墨水簽字筆書寫?？赡苡玫降南鄬υ淤|(zhì)量H：1C：12N：14O：16S：32Fe：56Cu：64Zn：65一、選擇題（本題包括10小題每小題只有一個選項符合題意，每小題2分，共20分）1.下列變化中屬于物理變化的是A.木炭吸附B.緩慢氧化C.氫氣驗純D.膽礬煉銅2.2021年3月，習(xí)近平

2、總書記在福建考察時指出：健康是幸福生活最重要的指標(biāo)?！瓣P(guān)愛生命擁抱健康是生活中永恒的主題。下列做法不可取的是A.大力推廣公筷行動減少疾病傳播B.合理使用農(nóng)藥和化肥，減少水土污染C.變質(zhì)的食物加熱后食用殺菌消毒D.開發(fā)利用新能源，減少化石燃料的使用3.正確操作是化學(xué)實驗成功的基礎(chǔ)，下列操作正確的是A.用滴管取液體B.稀釋濃硫酸C.取用固體粉末D.塞緊橡膠塞4.化學(xué)與生產(chǎn)、生活密切相關(guān)。下列對生產(chǎn)、生活實際問題的解釋正確的是A.吹滅蠟燭隔絕空氣B.洗滌劑清洗油污溶解油污C.濃硫酸做于燥劑濃硫酸脫水D.煤炭脫硫減少大氣污染5.下列說法正確的是A.空氣中含量最多的氣體是氧氣B.電解水時與電源正極相連的

3、試管中產(chǎn)生的氣體具有助燃性C.防止鐵制品生銹必須同時隔絕氧氣和水D.一氧化碳和二氧化碳組成元素相同，化學(xué)性質(zhì)相同6.“曹州牡丹甲天下”，牡丹花開時花香四溢除觀賞性外，還有藥用價值。其根制成的名貴中藥“丹皮”中含有的牡丹酚（C9H10O3）具有鎮(zhèn)痛、抗炎等作用。下列描述不正確的是A.C9H10O3由9個C原子、10個H原子、3個O原子構(gòu)成B.牡杜丹酚是由三種元素組成的有機(jī)物C.花香四溢是分子不斷運動形成的D.C9H10O3相對分子質(zhì)量為1667.“芯片”是電子產(chǎn)品的核心部件氮化鎵是制造芯片的材料之一，右圖是鎵元素（Ga）的原子結(jié)構(gòu)示意圖及元素周期表的一部分。下列說法不正確的是A.鎵屬于金屬元素，

4、m=3B鎵化學(xué)性質(zhì)比較活潑，易形成陽離子Ga+3C鎵元素的位置應(yīng)該在Z處D.鎵的最外層電子數(shù)與A相同8.“證據(jù)推理與模型認(rèn)知”是化學(xué)學(xué)科核心素養(yǎng)的重要組成部分。下列推斷合理的是A.酸雨的pH7，所以pH7的雨水都是酸雨B.制取氧氣和二氧化碳時必須檢驗裝置氣密性，所以制取氣體時都要檢驗裝置的氣密性C.化學(xué)變化常常伴隨能量的變化，所以有能量變化的一定屬于化學(xué)變化D.陰離子帶負(fù)電，所以帶負(fù)電的粒子都是陰離子9.下列實驗操作不能達(dá)到實驗?zāi)康牡氖沁x項實驗?zāi)康倪x擇試劑操作方法A鑒別氯化銨和氯化鉀熟石灰取樣，分別加入少量熟石灰，研磨聞氣味B除去銅粉中的少量鐵粉稀鹽酸加入足量稀鹽酸過濾洗滌烘干C從氯酸鉀制取氧

5、氣的剩余固體中回收二氧化錳水溶解、過濾、洗滌、烘干D檢驗碳酸鈉溶液中是否含有氯化鈉稀鹽酸硝酸銀取樣先加入過量稀鹽酸后再滴加硝酸銀溶液10.下列圖像能正確反映對應(yīng)變化關(guān)系的是A.向等質(zhì)量的鋅粉和鐵粉中分別加入足量等濃度的稀鹽酸B.加熱氯酸鉀和二氧化錳的混合物制取氧氣C.在密閉容器中用足量紅磷測定空氣中氧氣的含量D.向一定質(zhì)量的飽和氫氧化鈣溶液中加入氧化鈣二、非選擇題（本題包括6小題，共30分）11.（4分）請用適當(dāng)?shù)幕瘜W(xué)用語填空。（1）2個氧原子_（2）保持氮氣化學(xué)性質(zhì)的粒子_（3）人體缺少會導(dǎo)致骨質(zhì)疏松的元素_（4）氯化鐵中鐵元素的化合價為+3價_12（6分）菏澤具有悠久的文化歷史，近年來不僅

6、經(jīng)濟(jì)發(fā)展迅速生態(tài)環(huán)境也愈來愈好。（1）菏澤特產(chǎn)“黃河鯉魚”，金鱗赤尾，肉質(zhì)鮮美，含有豐富的_深受人們喜愛。A.糖類B.蛋白質(zhì)C油脂（2）菏澤牡丹機(jī)場已經(jīng)通航，高鐵正在建設(shè)之中。合金鍛鋼是制作高鐵剎車片的材料之，它屬于_（填“合成材料”或“金屬材料”），高速行駛的列車緊急制動時，輪轂盤面和剎車片的溫度瞬間可達(dá)700以上，合金鍛鋼應(yīng)該具備耐磨和_等特性。（3）為了完成2060年實現(xiàn)碳中和的目標(biāo)，菏澤積極行動，不斷增加綠地面積，探尋二氧化碳的轉(zhuǎn)化方法。下圖是將二氧化碳高效轉(zhuǎn)化為甲醇的微觀過程，關(guān)于該過程說法不正確的是A.該過程實現(xiàn)了無機(jī)物到有機(jī)物的轉(zhuǎn)化B.甲、乙、丙、丁四種物質(zhì)中只有乙屬于單質(zhì)C丙的

7、化學(xué)式為CH3OHD.參加反應(yīng)的甲和乙的分子個數(shù)比1：1（4）右圖為20時氯化鈉飽和溶液中溶質(zhì)和溶劑的質(zhì)量關(guān)系，則20時氯化鈉的溶解度為_g。某醫(yī)藥公司要生產(chǎn)0.9%的生理鹽水100噸，需要該溫度下的氯化鈉飽和溶液_噸。13（4分）A、B、C、D、E是初中化學(xué)中常見的物質(zhì)，A、B組成元素相同且常溫下均為液體，C、E之間的轉(zhuǎn)化可以實現(xiàn)自然界中的碳氧循環(huán)，D是最簡單的有機(jī)物。（“”表示物質(zhì)間存在相應(yīng)的轉(zhuǎn)化關(guān)系，“一”表示物質(zhì)間能發(fā)生反應(yīng)，部分反應(yīng)物、生成物和反應(yīng)條件已省略）。（1）D的化學(xué)式是_（2）寫出C的一種用途_（3）寫出中屬于分解反應(yīng)的化學(xué)方程式_（4）寫出“CB”的一個化學(xué)方程式_14.

8、（5分）在實驗室中，我們常用下圖所示裝置制取和收集某些氣體。（1）寫出a儀器的名稱：_（2）實驗室制取二氧化碳時，你選擇的發(fā)生裝置為_，化學(xué)反應(yīng)方程式為_（3）經(jīng)查閱資料，Na2O2（過氧化鈉）通常情況下為淡黃色固體，能與水發(fā)生劇烈反應(yīng)產(chǎn)生氧氣。小明在實驗室用Na2O2制取氧氣時發(fā)生裝置選擇了B而沒有選擇C，你認(rèn)為他選擇的理由是_。若用F裝置收集氧氣，進(jìn)氣端應(yīng)選擇_端（用“b”或“c”填空）。15.（6分）某化學(xué)興趣小組為驗證硫酸的部分化學(xué)性質(zhì)使用氫氧化鈉、碳酸鈉、金屬鋁和另外一種不同類別的物質(zhì)A進(jìn)行了相關(guān)實驗（1）實驗時觀察到稀硫酸與A反應(yīng)有藍(lán)色溶液生成則A物質(zhì)是_。（2）稀硫酸與氫氧化鈉溶

9、液反應(yīng)時沒有明顯現(xiàn)象為了證明二者發(fā)生了反應(yīng)，該組同學(xué)設(shè)計了如圖一所示實驗，傳感器測定的pH和溫度隨溶液質(zhì)量變化的情況見圖二、圖三。則B溶液是_溶液，圖三中的M與圖二中X、Y、Z中的_數(shù)值相等。（3）該化學(xué)興趣小組又做了如右圖所示實驗：【提出問題】號試管中無色溶液的溶質(zhì)是什么？【作出猜想】猜想一：硫酸鈉猜想二：硫酸鈉、硫酸猜想三：_【實驗驗證】該小組同學(xué)用試管取適量號試管中的無色溶液，加入一種試劑后，根據(jù)產(chǎn)生的現(xiàn)象推斷出了號試管中溶質(zhì)的成分，該試劑是_【質(zhì)疑反思】甲同學(xué)認(rèn)為猜想三不能成立，因為號試管中溶液混合后燒杯中沒有藍(lán)色沉淀生成。乙同學(xué)則認(rèn)為猜想三是可以成立的，理由是_。16.（5分）孔雀石

10、主要成分是堿式碳酸銅Cu2(OH)2CO3，另外還含有少量的SO2等雜質(zhì)（雜質(zhì)不與硫酸發(fā)生反應(yīng)）。某化學(xué)興趣小組為測定孔雀石中Cu2(OH)2CO3的含量進(jìn)行如下實驗取30g孔雀石樣品，粉碎后放入燒杯中，將200g稀硫酸分成四等份，分四次加入燒杯中，測出每次完全反應(yīng)后燒杯內(nèi)物質(zhì)的總質(zhì)量實驗數(shù)據(jù)記錄如下：次數(shù)加稀硫酸前1234加入稀硫酸的質(zhì)量（g）050505050燒杯內(nèi)物質(zhì)的總質(zhì)量（g）3077.8125.6174.5224.5請完成：（1）Cu2(OH)2CO3+2H2SO4=2CuSO4+CO2+_。（2）該反應(yīng)中生成氣體的總質(zhì)量是_。（3）所用稀硫酸的溶質(zhì)質(zhì)量分?jǐn)?shù)。（寫出計算過程）菏澤市

11、二O二一年初中學(xué)業(yè)水平考試（中考）（參考答案）1-5.ACCDB6-10ABBDC11.（1）20（2）N2（3）Ca（4）12.（1）B（2）金屬材料高熔點（3）D13.（1）CH4（2）滅火（3）（4）CO2+2NaOH=Na2CO3+H2O14.（1）集氣瓶（2）B或C2HCl+CaCO3=CaCl2+H2O+CO2（3）B裝置可以控制反應(yīng)的速率15.（1）CuO（2）稀硫酸Y（3）硫酸鈉、氫氧化鈉酚酞號試管中如果有H2SO4剩余，會與試管中的NaOH反應(yīng)，即不會產(chǎn)生Cu(OH)216.（1）3H2O（2）5.5（3）解：設(shè)前兩次使用100g稀硫酸中溶質(zhì)質(zhì)量為xx=19.6g答：稀硫酸的

12、溶質(zhì)的質(zhì)量分?jǐn)?shù)為19.6%英語：Units 1-3 單元檢測題（新人教版選修9）第二部分： 英語知識運用 （共兩節(jié)，滿分45分）第一節(jié)：單項填空（共15小題； 每小題1分，滿分15分）從A、B、C、D四個選項中，選出可以填入空白處的最佳選項。21. Danny Ways jumping over the Great Wall and _ his own dream should be an inspiration to the youth in China.A. undertaking B. conductingC. performing D. accomplishing22. In many

13、 ways Chinas rapid growth has been seen as a(n) _ to improve the cooperation with other countries.A. attempt B. motivation C. conception D. realization23. Mr. Smith said that he couldnt take part in the exploration.It doesnt matter _ or not he will take part in it.A. whetherB. ifC. eitherD. that24.

14、I would appreciate _ if you could let me know in advance when the meeting will be held.A. thatB. thisC. itD. you25. She reckons that you should have _ minimum of three exercise classes a week to get any of _ benefits.A. a; 不填 B. 不填; theC. the; the D. a; the 26. The development of Chinas economy _ si

15、nce the 80s of last century.A. had acceleratedB. has been acceleratingC. is acceleratingD. accelerated27. _! The light is still on.It doesnt matter. I wear rubber gloves.A. Look out B. Check outC. Go out D. Set out28. The shy girl felt _ when she made some mistakes in her performance.A. amazed B. aw

16、kwardC. curious D. amused29. You look very happy, Jenny.So I am. Its fun _ to attend my brothers graduation ceremony.A. to take B. being takenC. taken D. taking30. The written record of our conversation doesnt _ what was actually said. There are a lot of mistakes.A. correspond with B. relate toC. lo

17、ok into D. compare with31. _ they had taken adequate precautions, they wouldnt have lost so much.A. If B . Since C. Though D. When32. To care for wisdom and truth and the improvement of the soul is _ better than to seek money and honour and reputation.A. pretty B. far C. fairly D. quite33. I heard t

18、hat Mary won the prize of the ecology contest._ She was not interested in it at all.A. Youre kidding! B. So what?C. Why not? D. Not really.34. Nowadays, young people choose jobs for other reasons _ money.A. for B. except C. with D. besides 35. _ men have learned much from the behavior of animals is

19、barely new.A. Those B. That C. What D. Whether第二節(jié)：完形填空（共20小題； 每小題1.5分，滿分30分）閱讀下面短文，掌握其大意，然后從36-55各題所給的四個選項（A、B、C和D）中，選出最佳選項。Just before Christmas 1978, Kenneth was a passenger in a car as it drove through the Navajo Nation. The night was dark, and the driver, an elderly woman, 36 and killed an eight

20、-year-old boy.Later, when he saw how sad the boys family were, Kenneth made a(n) 37 . He would “do 38 it takes to make 39 happy at Christmastime.”A year later, at the age of 18, he was living with his mother and younger brother. They were 40 making ends meet on his low wages, but Kenneth bought a us

21、ed Santa suit and went around 41 people as poor as himself to give candy and fruit for families even more needy.Just before midnight on Christmas Eve, he went knocking on doors of 42 houses in the poorest section of the Navajo Nation. Many of the darkened homes didnt have 43 .Some families were 44 t

22、o open their doors so late at night. “Its a man! He has a big bag!” he 45 a boy, holding up a lantern (燈籠) and watching 46 the curtains, tell his parents. Kenneth convinced them he was 47 .At every opened door, he 48 candies, oranges, toys and so on. Many Navajo kids had never seen 49 before, so his

23、 old costume and store-bought beard didnt 50 them. It touched Kenneth that the kids were excited by so 51 .He 52 it up year after year, gathering more “elves (精靈)” to help him. His Christmas Eve 53 have grown into an annual Navajo feast with gifts of clothing, tools and toys for over 700 people. Kid

24、s who cant 54 it to the event because theyre sick or lack transportation get a 55 visit from Kenneth or one of his elves.“My grandfather taught me that you learn to be a man by sharing and by keeping promises,” he says.36. A. struck B. touchedC. foundD. stopped37. A. conclusion B. excuseC. promiseD.

25、 effort38. A. whichever B. whereverC. however D. whatever39. A. the family B. children C. brothers D. his mother40. A. probably B. almost C. hardly D. nearly41. A. suggesting B. persuadingC. requiring D. calling42. A. old B. bigC. bright D. lonely43. A. electricityB. foodC. doors D. windows44. A. ha

26、ppy B. angryC. afraid D. eager 45. A. thought B. hopedC. let D. heard46. A. out for B. from behindC. from under D. out of 47. A. gentle B. generous C. harmless D. helpful 48. A. reached for B. put down C. picked out D. handed out49. A. Kenneth B. candiesC. elves D. Santa Claus 50. A. disappoint B. s

27、atisfy C. attract D. please 51. A. much B. bigC. little D. many 52. A. held B. kept C. gave D. took 53. A. gifts B. experiencesC. excitements D. visits 54. A. make B. do C. get D. have 55. A. usual B. personal C. normal D. formal 第三部分： 閱讀理解 （共20小題; 每小題2分, 滿分40分）閱讀下列短文，從每題所給的四個選項（A、B、C和D）中，選出最佳選項。AIb

28、rahim became disabled after contracting polio （小兒麻痹癥） when he was three years old. At first his parents, like many other parents of disabled children in Niger, did not want to send him to school. They were worried he would be laughed at by his classmates. Despite his disability, and his parents doub

29、ts, Ibrahim was determined to go to school. “When I was eight,” Ibrahim says, “other kids of my age were going to school while I stayed at home. I did not like that. So, I pestered（纏著） my parents until they finally let me go to school.” Ibrahims parents sent him to a private school nearby. Although

30、the journey to and from school was a short one, it still wasnt easy for Ibrahim. He had to use his hands to help him move along, protecting them with plastic slippers. But at least he was getting an education.However, after only a year in school, Ibrahims education was interrupted when his parents s

31、eparated. His mother did not have the means to continue paying for his tuition （學(xué)費）.In 2007, Ibrahim received some money to be fitted with a leg brace (支架), corrective shoes and his first pair of crutches (拐杖). Now that he was more mobile than before, the most important thing for him was to find a w

32、ay to go back to school. “I wanted to start school again last October,” Ibrahim says. “After my mother told me she could not afford it, I went to visit some of my relatives for support. And I collected 5,000 francs CFA (US $8) to pay my tuition for half a year. I will find the rest of the money some

33、how.”Ibrahim attends a school in which he is the only disabled student. According to his teacher, he is among the top five students in a class of 55. 56. Why did Ibrahims parents prefer Ibrahim to stay at home? A. There was a lot of housework for him to do. B. They had no money to pay for his tuitio

34、n. C. There were not enough schools in the country. D. They were afraid the students would make fun of him. 57. How did Ibrahim go to school before his parents separated? A. He went to school on his wheelchair. B. He went to school on his parents bicycle. C. He walked to school with the support of h

35、is hands.D. He walked to school using a pair of crutches.58. Ibrahims education was interrupted because of his _. A. parents doubts B. lack of tuition C. physical disabilityD. terrible mood 59. The best title for the passage might be _.A. A long way to goB. Determined to learnC. The only disabled st

36、udent D. I did not like thatB A huge shire horse (夏爾馬) in Australia has been declared the biggest horse in the world by its owner, beating the current Guinness World Record by several inches. The giant five-year-old, from Pakenham, S.E. Australia, measures an amazing 20.1 hands, or 2.057m tall. He w

37、eighs over 1.3 tons (1,300kg) about the same as a small car and is still growing.His owner, horse trainer Jane Greenman, 47, says the only time the horse runs is when there is food on offer. “He eats an incredible amount. I would hate to run a team of eight horses his size it would send you broke (破

38、產(chǎn)的),” she says.The massive horse, whose name is Noddy, was born in Australia with parents imported from England. Noddys grandfather, Ladbrooke Edward (UK) was the worlds tallest horse during the 1980s. But Jane had no idea that the horse she raised from the age of six months would grow this big. Nod

39、dy immediately began to rocket and soon overtook (超過) both his parents in size. Although she says that she is not interested in the Guinness Book of World Records, Jane has carried out her own research and is sure that Noddy comes top. “The nearest is a horse in Texas, at 20 hands,” says Jane. “Nodd

40、y is already an inch taller than that. The scary thing is he still hasnt finished shire horses arent fully grown until theyre about six or seven.”Jane has said that Noddy could be sold overseas, possibly even fetching a record price to match his height. She is unwilling to sell, but to cover the hig

41、h cost of keeping him, she needs to put him to work. “He needs a job. Its very hard to find jobs for such a big horse in Australia. I wish he could stay here but Ive tried everywhere,” she says regretfully. “I just want people to enjoy this beautiful animal as much as I do.”60. The underlined word “

42、rocket” in Paragraph 4 probably means _.A. walk aroundB. eat a lotC. grow fastD. look strong61. Which of the following is a big problem for the horses owner?A. She doesnt know how to apply for the Guinness World Record.B. She has to support eight big horses at the same time.C. Another horse in Texas

43、 is growing even faster than hers.D. There is not enough money to cover the cost of raising her horse.62. It can be inferred from the passage that _.A. Noddy must be as powerful as a small carB. Noddys growth can be genetically explainedC. many people are willing to buy NoddyD. no job will be availa

44、ble for Noddy at all63. What would be the best title for this passage?A. New world record for the biggest horseB. Jane Greenman becomes famous for her horseC. Large size means no job for a big horseD. Shire horses tend to grow bigger than othersCNO PLANS FOR THE HOLIDAYS?Special Story Time for All L

45、ower Primary PupilsNO PLANS FOR THE HOLIDAYS?Special Story Time for All Lower Primary PupilsSCHOOL LIBRARYREADING ROOM2 pm - 3 pmJune 6Mr. Stephen Keene will impress you with stories from his famous New Kids Next Block series.FREE ADMISSIONLEARN HOW TO PLAY THELEARN HOW TO PLAY THEGUITAR IN 4 EASY L

46、ESSONS!Venue: Music RoomTime: 9 am - 12 pmDates: June 6, 13, 20, 27Instructor: Miss S Katsumi from JapanFees: $40 for 4 lessons*($20 for members of the school band and school choir)Register with Mrs. Mary Mi, the Choir Mistress, NOW.It is compulsory for students who sign up to attend ALL four lesson

47、s.JOIN THE GEOGRAPHYCLUBS TWILIGHT CRUISE (黃昏巡游)JOIN THE GEOGRAPHYCLUBS TWILIGHT CRUISE (黃昏巡游)June 19, 5 pm - 8 pmView Singapores wonderful skyline by night.Cruise past Kusu Island and Pulau Tekukor (Dove Island).Enjoy a great dinner under the starlit sky.HURRY! VACANCIES (空缺) ONLY FOR THE 1ST 20 PU

48、PILS WHO SIGN UP.*Get your consent forms (同意書) from Miss Yu and return the forms with your payment ($20) by 30 May.*If there are more than 20 pupils interested in the cruise, priority (優(yōu)先權(quán)) will be given to Geography Club members.64. A pupil who prefers not to spend any money can go for _.A. the cru

49、ise B. story timeC. the school choirD. the guitar lessons65. Who will conduct the guitar lessons?A. The band instructor.B. The choir mistress.C. An invited guest.D. Mr. Stephen Keene.66. To go for the cruise, pupils need to _.A. be Geography Club membersB. pay $30C. know how to swimD. have some form

50、s filled67. If a pupil is going away for the holidays with his / her family from June 1 to June 7, he / she can still go for _.A. the cruise B. story timeC. the school bandD. the guitar lessonsDRecently, online high schools in America have sparked （激發(fā)） a debate about whether or not taxpayers money s

51、hould be used to support online education. Online schools receive the same amount of funding as all other public schools, even though they dont have to pay for rent or school equipment. States should use their educational funds to improve education at real schools, not to support online programs.Som

52、e students only use online classes to supplement their school work. They benefit from the social experience of a traditional high school, while still taking online courses. However, about 90 thousand students in America receive their education only from online schools. 50 thousand of these students

53、take courses at Florida Virtual School, the largest online school in the country. While this method of schooling helps students who live in remote regions, most school systems are upset that they are losing more students each year to these online programs. Although online learning allows children to

54、 work at their own pace, these online schools have only one teacher per several hundred students. Often, teachers cant give struggling students the help they need as they are unable to talk face-to-face with them, to find exactly what theyre having difficulty with. Additionally, even though online s

55、chooling accommodates（顧及） students who live in more remote states, students in online programs may suffer in social situations because they will not learn valuable communication skills from their schooling. Similar to students who are home schooled, those who take only online classes wont learn soci

56、al etiquette（禮節(jié)）, and will be treated differently by their peers （同齡人）. Online schooling might be useful for places where there are not enough students for a real school, such as agricultural regions, but states should only spend taxpayers money on online schools in extreme cases.68. What is the pas

57、sage mainly about? A. Whether students should study at online schools. B. Whether online schools should be allowed to exist.C. Whether taxpayers should pay for online schools.D. Whether traditional schools should be replaced.69. According to the passage, online schooling _.A. is helpful to students

58、living in remote regionsB. allows students to work togetherC. makes it possible for students to get immediate helpD. develops students critical thinking70. According to Paragraph 5, the author worries that students at online schools _.A. might lose interest in learning B. would play online games C.

59、could not receive teachers help D. could not become fully developed 71. What is the authors attitude? A. Taxpayers should not pay for online schools at all.B. Taxpayers should pay more for online schools than real schools. C. Taxpayers money should be spent on online schools conditionally. D. Taxpay

60、ers should support online schools in different ways.EMost schools forbid chewing gum, but in a few years they might consider changing that rule. Why? Scientists are finding evidence that gum chewing may be good for your health. It may even help improve your test scores. This exciting research is jus