㈠ (2013奉賢區二模)如圖所示的電路,當開關S1斷開,S2與2接通時,燈泡L1最亮,燈泡L2與L4的亮度相同,且
A、B由題,當復開關S1斷開,制S2與2接通時,四個燈泡串聯,電流都相同,由燈泡L1最亮,燈泡L2與L4的亮度相同,且最暗,可知,L1電阻最大,L2與L4的電阻相同,且最小;當開關S2與3接通、S1閉合時,L2與L1並聯後另外兩燈串聯,L2與L1並聯電壓小於另外兩個燈泡的電壓,而L1電阻最大,由公式P=
U2 |
R |
UI |
EI |
U |
E |
㈡ (2013奉賢區二模)如圖所示,一絕緣輕繩繞過無摩擦的兩輕質小定滑輪O1、O2,一端與質量m=0.2kg的帶正電
(1)設環受到重力為Gp,電場力為F,繩子拉力為T,對環受力分析如圖,其中F=qE=4×10-5C×5×104N/C=2N.
由平衡條件得:Tcos37°+N1=(Gp+F)cos53°
代入數據得:N1=0.8N
㈢ (2013奉賢區二模)在圖(a)所示的電路中,電阻R1的阻值為20歐,變阻器R2標有「20Ω 2A」字樣,閉合電
(1)電阻R1的電壓U1=I1R1=0.3A×20Ω=6V,
電阻R1與R2並聯,接在電源兩端,所以電源電壓U=U2=U1=6V;
答:電源電壓是回6V.
(2)由電路圖知,電流表A1測支路R1電流,電流表A2測幹路電流,
由題意可判斷得出:圖b所示電流表是串聯在幹路上的電流表A2,
且示數為I=0.7A,所以流過電阻R2的電流I2=I-I1=0.7A-0.3A=0.4A,
滑動變阻器接入電路的阻值R2=
U2 |
I2 |
6伏 |
0.4安 |
㈣ (2013奉賢區二模)我國北方某鹽湖生產的純鹼(Na2CO3)產品中常含有少量的氯化鈉(其它雜質忽略不計)
(1)設6克試樣中含碳酸鈉的物質的量為x
Na2CO3+CaCl2=CaCO3↓+2NaCl
11
x 0.05mol
1 |
x |
1 |
0.05mol |
0.05mol×106g/mol |
6g |
㈤ (2013奉賢區二模)為了探究二氧化硫的漂白作用到底是二氧化硫本身還是二氧化硫與水作用的產物,某學習
(1)該實驗是探究乾燥的SO2能不能使品紅褪色,所以二氧化硫通入品紅溶液前要進行乾燥;二氧化硫有毒,所以多餘氣體不能直接排空,故要有尾氣處理裝置,
故答案為:①二氧化硫沒有乾燥(或缺少二氧化硫的乾燥裝置);②沒有尾氣吸收裝置;
(2)二氧化硫和水反應生成亞硫酸,SO2+H2O?H2SO3,亞硫酸是二元弱酸,所以能發生兩步電離,第一步生成氫離子和亞硫酸氫根離子,亞硫酸氫根離子電離生成亞硫酸根離子和氫離子,H2SO3?H++HSO3-,HSO3-?H++SO32-,以上反應都是可逆反應,所以存在的含有硫元素的微粒有(除二氧化硫外)H2SO3、HSO3-、SO3 2-,
故答案為:H2SO3、HSO3-、SO3 2-;
(3)亞硫酸鈉和亞硫酸氫鈉都是強鹼弱酸鹽,都能發生水解,水解反應方程式為:亞硫酸鈉的水解,SO32-+H2O=HSO3-+OH-、HSO3-+H2O=H2SO3+OH-;亞硫酸氫鈉的水解,HSO3-+H2O=H2SO3+OH-;通過水解方程式看出,無論亞硫酸鈉還是亞硫酸氫鈉都能水解生成亞硫酸,故該說法錯誤,
故答案為:不正確,因亞硫酸根離子和亞硫酸氫根離子都會水解生成亞硫酸;
(4)①亞硫酸鈉和亞硫酸氫鈉都能電離和水解,但水解是微弱的,電離程度大於水解程度;亞硫酸氫根離子能電離出亞硫酸根離子,但較弱,所以亞硫酸氫鈉溶液中的亞硫酸根離子比亞硫酸鈉溶液中的小;亞硫酸氫鈉溶液中的亞硫酸氫根離子比亞硫酸鈉溶液中的大;亞硫酸根離子的水解程度大於亞硫酸氫根離子的水解程度,且亞硫酸根離子的第二步水解更弱,所以亞硫酸氫鈉溶液中的亞硫酸比亞硫酸鈉溶液中的大,
故答案為:小;大;大;
②根據實驗和分析,得出的結論是使品紅褪色的微粒是亞硫酸根離子,
故答案為:使品紅褪色的微粒是亞硫酸根離子.
㈥ (2013奉賢區二模)三根繩a、b、c長度都為l,a、b懸掛在天花板上,c的下端與質量為m=2kg物體相連,它們
解答:
㈦ 奉賢區中考語文二模卷(2012)答案
一、文言文(42分)
(一)(18分)
1.芳草萋萋鸚鵡洲2.星漢燦爛3.道是無晴卻有晴.
4;向來枉費推移力5.率妻子邑人來此絕境6.意將隧入以攻其後也
(每空3分,一個錯別字扣1分,扣完為止).
(二)(4.分)
7.飄忽繚繞的雲靄霧氣。(2分)8.,C(2分)
(三)(8分).
9.清(1分)姚鼐(1分)
10.天邊雲彩上有一線奇異的顏色,一會兒又變成五顏六色。(3分)
誓
11.D(3分)、
(四)(12分)
12,n)離開(2分)(2)對....。,感到奇怪(2分)
,13.(戴原禮)聽說有一個醫生醫術非常離明,治病立即見效,於是親自去察看情況.。
(3分):-
14.分不清醫書的「錫」和「餳」兩個字,指導病人煎葯時將「加糖」說成「加錫」。(2分)
15.我們在工作和學習中不能自以為是、一知半解、不懂裝懂,否則就會造成工作和學習
的失誤。
我們不能不辨是非、聽信傳言、盲目從眾,否則會給自己帶來重大損失。(3分)
二、,現代文(48分).
(一)(20分)
16.(1)司馬遷(1分),《陳涉世家》(1分)
(2)B(2分)
17.對比論證突出了對於讀經典只有探索體味,才能讀出經典的不同凡響之處
(4分)
18.為「仁」、「義」的道德理想而獻身(的精神)(2分)例:略(2分)
.19.專一(1分)玩味(1分)致用(1分)層進(2分).
20.C(3分)
(二)(28分)
r
21.繚(2分)
22.交代了其他師傅都查不出漏水的原因,突出修理的難度大,也表現出「我」對這個水電師傅修理技術的懷疑;與下文水電師傅找出漏水症結並修理好水管形成對比,突出水電師傅修理技術的高超。(3分)
23.第一處:希望「我」能留他下來修理漏水問題而討好「我」(2分)
.第二處:終於找到了漏水的原因而高興(2分),,
三處:修理過程中不知不覺把「我」當徒弟使喚而感到不好意思(2分)
24..(1)木訥的水電師傅在修理水管時變得干練和自如(
3分)
(3)內向的小吃店老闆做拉麵時一招一式充滿了陽剛之氣(3分)
25.C(3分)
26.略。要點:感點明確,表述清晰,語言流暢(8分)
㈧ 2015高三二模化學奉賢區試卷答案
1-ABABD CDCAAC DB
16-20CABCB
21-25 DCBDC 26-30CBCDC
31-35 ADDBB 36-40DEFAC
41-45 ADBBC 46-50ACADB
51-55 BCCDA 56-60DDCBB
61. it 62.of
63. is 64.overlooking
65. became 66.which
67. the 68.geographical
69. equipped 70. that
短文改錯:
71. Look back to ... Look → Looking
72. ... several days before ...
before → ago
73. ... I think reason ... reason前加the
74. But I believe ... But → And
75. ... make friends with ...
make → made
76. ... from other city ... city → cities
77. Most important ...
important → importantly
78. ... I shouldn't have ...
shouldn't → couldn't
79. ... wish everyone for ... 掉for
80. ... we take count. count → counts
One possible version:
Hi everyone! I'm Li Hua from Senior Three.Today I am glad to be running for chairman of the English Club. I think I'msuitable for the position. As monitor of my class, I have been thought highlyof by my classmates and teachers. I'm a good communicator and good atorganising activities. Most importantly, I can speak fluent English and oftencommunicate with foreigners.
If I'm lucky enough to be elected aschairman, I will try my best to arrange more activities and create a strongerEnglish atmosphere for us. I sincerely hope you will give me a chance and votefor me.
Thank you.
部解析
閱讀理解:
A篇(藝術)
本文記敘文文章講述樂隊指揮Andersson音樂帶入故事
21. D細節理解題由第二段末 I bought many recordings of the world's great orchestras andconctors and listened to them for hours on end知
22. C推理判斷題由第三段What audiences do not see is all the work ... with the orchestra推斷樂隊指揮式表演前需要做准備工作
23. B推理判斷題由第四段reads about the composer's life ... Her goal is to recreate themusic as the composer intended推斷Andersson所解作曲家更再現音樂
24. D細節理解題由倒數第二段To help young musicians understand how to play the music, Anderssonmight tell them to ... 知
B篇(家庭、朋友與周圍)
本文議論文作者認家注重孩賦忽略品格
25. C推理判斷題由第段I'm having a lot of conflicting emotions第二段Maybe I'd be out therebragging with some moms if she was ... 及第三段But that's a lie. I prayed for better than normal. Maybe that's whyI feel terrible when ... 推斷作者智力平平;聽別媽媽誇耀自孩賦作者羞愧
26. C詞義猜測題由第二段if she was reading on an eighth grade level instead of ... beingsome kind of combination of Gandhi and Mozart推斷劃線詞意思奇才
27. B推理判斷題由第四段she also cares about other people's feelings及文所舉兩例推斷Violet善良孩
28. C細節理解題由段But no one brags about how nice their kid is ... stories of kindness知作者喜歡聽關於孩品格故事
C篇(健康)
本文說明文文章介紹季節性敏加劇原緩解辦
29. D推理判斷題由第段The long winter with bitter cold temperatures delayed some trees ...the biggest cause of spring allergies推斷氣候變化即較冬季導致些樹木延期授粉進導致量樹木同段間授粉使季節性敏加劇
30. C細節理解題由第點建議So by peeling or cooking fruit, you can lessen or completely avoidany reaction知
31. A推理判斷題由第二點建議Hair pastes cause the hair to become a pollen magnet推斷美發產品吸引花粉
32. D細節理解題由第三點建議make sure you at least wash your face at night知
D篇(購物)
本文應用文文章則座椅電梯廣告
33. D細節理解題由文A simple clear LED display shows the status of the stairlift知顯示屏顯示座椅電梯狀況
34. B細節理解題由文章末EXPIRES October 31, 2015知201510月31前購買才能享受優惠
35. B文章處題通讀全文知本文則關於座椅電梯廣告
七選五:
題:情
本文議論文文章論述錢與快樂比
36. DD項與文oftenlong hours away from home ... richer financially相呼應
37. EE項針第段所提問題答;文People who earn a good living are often happier than people who livein poverty進步說明E項內容
38. FF項與文comfortablestandard相呼應;文Here inthe U.S., the standard falls around $75,000F項舉例說明
39. AA項起承啟作用引關於金錢快樂錯誤觀念
40. CC項與文the ideathat life would be happier ... measurable happiness及文People who earned $50,000 wereonly 9 percent more content than those making $25,000相呼應
完形填空:
題:現代技術
本文說明文文章介紹款能接電手機
41. A42. D智能手機我已經變普遍(common)至於難(hard)想起前網路覆蓋范圍
43. B由第三段people to live in the moment及the minimum amount of connectedness推斷Light Phone設計宗旨使使用盡能少(little)
44. B智能手機能給提供各種信息便利使用率高;Light Phone則使少用手機故款手機設計理念與主流趨勢(trend)相反
45. C由文make a proct推斷兩位創辦見面快決定要創造(create)種產品
46. A由文people to live in the moment推斷兩位創辦想創造種幫助與外界斷聯系(disconnect)產品使受太外界干擾
47. C由第段末go against the ... 推斷款新研發產品功能與智能手機功能相反(opposite)
48. A由文知新型產品使(allows)
49. D由第四段receive forwarded calls from your phone, which you leave at home知創辦者始考慮手機留(leave)家
50. B由文doesn't have a screen at all推斷款沒屏幕裝置應該(small)
51. B款裝置(just)數字鍵盤
52. C手機留家使獲片刻休息盡情享受(enjoy)周圍世界
53. C由段your phone, which you leave at home in order to ... 及文for certain ... we don't really... 推斷創辦者說應該(shouldn't)使用智能手機
54. D由文like when taking your kid to the park or having dinner with yourwife推斷處說某些刻(moments)
55. A文提某些刻手機留家說實際並需要(need)自臉譜網等通知
56. D由文wondering if someone's trying to ... in an emergency推斷Light Phone使休息同用擔(anxiety)別急事與自聯系
57. D由第四段the ability to receive forwarded calls from your phone推斷Light Phone使使用者轉接打給智能手機電使用者必擔需要緊急聯系(reach)
58. C(if)享受機夠吸引使用者隨看智能手機所通知等
59. B由文and notifications推斷處指自智能手機太緊急或重要信息故選emails
60. B由文isn't attractive enough推斷使用者隨能夠看自智能手機電郵件通知像給使用者款待(treat)
語填空:
61. it考查代詞設空處指代文the closest U.S. port city to Europe故填it
62. of考查介詞consist of固定短語意由……組
63. is考查般現由前句知設空處描述客觀事實故填is
64. overlooking考查詞-ing形式作定語用peninsulas與overlook(俯瞰)間邏輯主謂關系且overlook所表示作進行故填overlooking
65. became考查般由in the 18th century知become所表示作發故填became
66. which考查關系詞設空處引導非限制性定語句指代前面整主句內容故填which
67. the考查定冠詞序數詞前要加定冠詞the
68. geographical考查形容詞作定語用設空處修飾名詞position故填形容詞geographical
69. equipped考查詞作定語用equip與ships間邏輯賓關系且equip所表示作已完故填equipped
70. that考查連接詞設空處引導賓語句且句缺故填that
㈨ 2013學年奉賢區初三語文二模卷答案
(一)
1、空山新雨後,天氣晚來秋。
2、錦帽貂裘,千騎卷平岡。
稍等,正在回答中