中學練習題
其實卷子都是大同小異的，沒什麼本質區別，主要在於側重點的不同。例如金榜側重於講解和練習，練與測側重於刷題等，無非都是知識點總結，然後題海戰術，重復練習。不過做卷子真正的意義應該是鞏固和提升對學習內容的理解。不過有的卷子內容與實際不符，做起來沒什麼意義，所以國內的好卷子其實並不多。
在此強力推薦五三，多做五三的卷就會發現它的答案給得乎完整，這就可以很好的幫助你的學習，對於成績不理想的同學可以輔助了解，對於優等生來說後面的大題給的又貼近實際考試，可以幫你做到拔尖。推薦可以買五三的長卷子，前面扉頁還附帶知識點，可以幫助復習知識。最主要的是五三側重於開放試題，可以見到許多巧妙的解題手法和技巧，這有利於日後的學習之路。總之五三真的不錯，比較適用於各學習階層的同學，希望對你有所幫助，祝你的成績越來越好！！！
❷ 初中習題
電功和電功率測試題
(時間:60分鍾 滿分:100分)
一.填空題(24分)
1.加在阻值為12歐的電阻器兩端的電壓是伏，5分內電流通過這個電阻做了 焦的功。
2.標有「12V 9W」字樣的小燈泡，它的燈絲在正常工作時的電阻是 歐，接到電路中通過它的電流是0.5安，則這盞燈的功率是 瓦。
3.一隻額定電壓是220伏的燈泡，把它接在電壓是110伏的電路上時，實際功率是25瓦，則此燈泡的額定功率是 瓦。
4.某電熱器的電阻是50歐，當它的電阻絲通過的電流是4安時，100秒可產生的熱量是 焦。
5.1千瓦時的電可供「P2 220—40」的電燈正常工作 小時。
6. 圖1，電源電壓保持不變，當開關S閉合時，電流表示數為3安，當S斷開時，電壓表的示數為4伏，R2消耗的功率為8瓦，則電阻R2 = 歐。
7.將電阻為R1的電熱器與阻值R2 = 24歐的電阻串聯後接在電壓一定的電源兩端。通電後電熱器的實際功率為它額定功率的 ，電路中的電流為1安。若將電熱器直接接到電源兩端，電熱器的功率恰為額定功率，則電源電壓等於 伏。
8.電燈L跟電阻R串聯後接到電壓為10伏的電源上，電路接通後，100秒內電阻R上電流做的功是10焦。已知電燈L的額定功率是10瓦，電阻R的阻值是10歐，電燈的電阻不變，則電燈的額定電壓是 伏。
二.選擇題(28分)
9.如圖2所示的電路中，當滑動變阻器滑片P向右滑動過程中（ ）
A.電流表示數變小，電壓表V1示數變大
B.電壓表V1示數不變，燈L亮暗不變
C.電壓表V2示數不變，燈L亮暗不變
D.電壓表V2示數變大，電流表示數變小
10.把標有「P2 220—40」的甲燈和標有「P2 220——25」的乙燈串聯在家庭電路中，則 （ ）
A.甲.乙兩盞燈的額定電壓都變小
B.甲.乙兩盞燈均不能正常發光，甲燈比乙燈亮些
C.甲.乙兩盞燈均不能正常發光，乙燈比甲燈亮些
D.甲.乙兩盞燈均不能正常發光，乙燈的實際電壓比甲的大
11.分別標有「6V，2W」和「12V，8W」的兩個燈泡，串聯後接在電路中，為使其中一個恰能正常發光，加在電路兩端的電壓應是（ ）
A.6V B.12V C.18V D.24V
12.額定電壓相同的甲.乙兩燈，串聯後接在某電路中，甲燈比乙燈亮，正列說法正確的是（ ）
A.甲燈的額定功率和實際功率都大 B.乙燈的額定功率和實際功率都大
C.甲燈的額定功率小，實際功率大 D.乙燈的額定功率小，實際功率大
13.某電路兩端電壓保持不變，若電路中只接一個電阻R1，電路中的電流為I，消耗的功率為P1，若在R1上並聯一個電阻R2時，幹路中的電流為2I，電路消耗的功率為P2，測P1:P2（ ）
A.1:2 B.2:1 C.3:1 D.1:3
14.將定值電阻R1單獨接在電壓不變的電源上，消耗的功率是20瓦，另一個定值電阻R2單獨接在這個電源上消耗的功率是R1消耗功率的1.5倍，若將R1和R2串聯接在這個電源上，則這個電阻消耗的總功率是（ ）
A.50瓦 B.25瓦 C.12瓦 D.10瓦
15.如圖3，電源電壓保持不變，當S1閉合，S2打開時，電流表的示數是I1，電阻R1的功率是P1，R1和R3消耗的功率之比是2:1；當S1打開，S2閉合時，電流表示數是I2，電阻R2的功率是P2，已知I1 : I2 = 2:3，則：（ ）
A.R2 : R3 = 2:1 B.R2 : R3 = 1:2
C.P1 : P2 = 8:9 D.P1 : P2 = 4:9
選擇題答案卡
題號 9 10 11 12 13 14 15
答案
三.作圖、實驗題(用伏安法測電阻)：（共24分）
16．將圖4中的電壓表、電流表接入電路（5分）
17．在下面的方框內畫出電路圖（5分）
18．閉合開關時，滑片P應置於變阻器的 端。（填「左」或「右」）（3分）
19．開關閉合後，電流表、電壓表示數如圖5所示，由此可知，電路中的電流I = 安，電阻R = 歐。（6分）
電路圖
20．請設計一個紀錄該實驗數據的表格(5分)
四.計算題(24分)
21.一個標有」220V 100W」字樣的燈泡,
(1) 接在220V電壓的電路上,它的電阻是多少?（4分）
(2) 接在110V的電路上時,它的實際功率是多少? （4分）
22.一個標有「6V 3W」字樣的燈泡與滑動變阻器串聯，若接在電源電壓為12V的電路里，滑動變阻器調至多大時，才能使小燈泡正常發光？（6分）
23.如圖6所示，當開關S接到a處時，電壓為4伏，電流表示數為0.5安，燈泡正常發光。當開關S接到b處時，電壓表示數為6.4伏，電流表示數為0.4安。設電源電壓不變，求：
(1) 燈泡L的額定電功率？（5分）
(2)開關接到b處時，燈泡L的實際電功率？（5分）
英語試卷
（考試時間為100分鍾，試卷滿分為100分）
班級________ 學號_________ 姓名________ 分數________
第二部分 筆 試（40分）
五、語言知識運用（1）
（一）單項填空（共15分，每小題1分）
從下列各題中所給的四個選項中選擇可以填入空白處的最佳選項。
21. Happy Teachers』 Day! Here is _______ card with our best wishes.
A. a
B. an
C. the
D. /
22. I』m sorry I』m late，because the traffic _______ bad.
A. is
B. are
C. am
D. be
23. –Do you like mooncakes?
–Yes. And I think the ________ with nuts are the nicest of all.
A. these
B. those
C. them
D. ones
24. Dolphins are ________ to people. If you fall into water，they may help you.
A. friendship
B. friendly
C. friends
D. friend
25. He is good at English and he can speak English very ________.
A. good
B. nice
C. well
D. fine
26. John』s family live ________ the countryside.
A. for
B. in
C. on
D. by
27. ________ people walk，Cody likes to follow them.
A. Because
B. Before
C. When
D. After
28. I think living in a town _______ quite interesting.
A. sounds
B. sound
C. sounded
D. is sounded
29. What is Tommy going to ________ about next time?
A. talks
B. talking
C. talk
D. talked
30. Keep your heart ________，you will find all the people are lovely and kind.
A. open
B. opened
C. opening
D. to open
31. Listen! Someone ________ next door.
A. sing
B. is singing
C. sings
D. is gong to sing
32. His name is Jack Black. What do you call him?
A. Mr Jack.
B. Mr Black.
C. Mrs Jack.
D. Mrs Black.
33. –What do you usually do on Saturday morning?
–I usually ________.
A. do lessons
B. begin lessons
C. study lessons
D. have lessons
34. He often gets ________ at 7:00 p.m. each day.
A. to home
B. at home
C. home
D. in home
35. They find it difficult to _________the difference between English and Chinese.
A. tell
B. speak
C. say
D. talk
（二）完形填空（共10分，每小題1分）
通讀下面的短文，掌握其大意，然而從短文後各題所給的四個選項中選擇能填入相應空白處的最佳選項。
Most people go to school 36 ecation. They learn many subjects just like English，maths，history. 37 go to school to learn a skill so that they can make a 38 . School ecation is very important and 39 . Yet， 40 one can learn 41 from school. A teacher can』t teach his students everything. The teacher』s job is to 42 his students 43 to learn. The teacher teaches them how to read and how to think. So the students 44 should learn much 45 outside school.
36. A. in B. of C. at D. for
37. A. Other B. The others C. Others D. The other
38. A. live B. living C. life D. lives
39. A. useful B. use C. uses D. use of
40. A. some B. any C. no D. only
41. A. something B. anything C. nothing D. everything
42. A. give B. tell C. show D. say
43. A. where B. how C. when D. why
44. A. they B. them C. themselves D. their
45. A. many B. much C. some D. more
六、閱讀理解（共15分，每小題1分）
閱讀下面A、B、C、D四篇短文。根據短文內容從每題所給的四個選項中選擇最佳選項。
(A)
Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. We need water to drink，to cook our food and clean ourselves. Water is needed in offices，factories，and schools. Water is needed everywhere.
There is water in seas，rivers and lakes. Water is found almost everywhere. Even in the driest part of the world，there is some water in the air. You cannot see or feel it when it is a part of the air. The water in the seas，rivers and lakes is liquid(液體). The water in the air is a gas，and we call it water vapour(蒸汽).
Clouds are made of water. They may be made of very small drops of water. They may also be made of crystals(結晶體). Snow crystals are very，very small crystals of ice. Ice is frozen water. It is a solid(固體). There can be snow and ice everywhere in winter.
46. Where can we find water?
A. We can find water when it turns into vapour.
B. Water can be found almost everywhere.
C. We can see water in deserts here and there.
D. Water is only in seas and rivers.
47. We can drink water when it is _________.
A. liquid
B. a solid
C. in the air
D. turned into ice
48. Clouds are made of _________.
A. seas，rivers and lakes
B. blocks of ice
C. very small drops of water or snow crystals
D. water in its solid state
(B)
Mrs Jones gave music lessons at a school. She had a good voice and enjoyed singing，except that some of her high notes sounded like a gate that had been forgotten to oil. Mrs Jones knew that so well that she tried to practice these high notes if she was free. As she lived in a small house，she usually had to go for long walks along the country roads and practised high notes there. Every time she heard a car or a person coming along the road，she stopped and waited until she could no longer be heard before she started practicing again.
One afternoon，a car came up behind her so fast that she didn』t hear it until it was only few meters from her. She was singing some of her highest and most difficult notes at that time when the car passed. The driver stopped his car in front of her suddenly，jumped out and began to look at his car carefully. To his great surprise，he couldn』t find anything wrong with his car. He got back into the car and drove off.
49. Mrs Jones was __________.
A. a music teacher
B. an office worker
C. a school bus driver
D. a singer
50. If she heard a car or a person coming，she would __________.
A. go for a walk along the country road
B. stop singing and wait
C. keep on practicing those high notes
D. make a sound like a gate that had been forgotten to oil
51. It was difficult for the woman _________.
A. to sing lowest notes
B. to sing the highest notes
C. to have a good voice
D. enjoy singing
52. Why did the driver stop his car suddenly?
A. Because he drove too fast.
B. Because he wanted to say hello to Mrs Jones.
C. Because he enjoyed Mrs Jones』 voice.
D. Because he thought that his car was in trouble.
(C)
When you are reading something in English，you may often come across a new word. What』s the best way to know it?
You may look it up in the English-Chinese Dictionary. It will tell you a lot about the word: the pronunciation，the part of speech，the Chinese meaning and also how to use this word. But how can you know where the word is in thousands of English words? How to find it in the dictionary both quickly and correctly?
First，all the English words are arranged in the alphabetical order. In the dictionary you can first see the words beginning with the letter A，B，C，D，E…That means，if there are two words 「desert」 and 「pull」，「desert」 will be certainly before 「pull」. Then if there are two words both beginning with the same letter，you may look at the second letter，then the third，the fourth，… For example，「pardon」 is before 「plough」，「judge」 before 「just」 etc.
53. When you don』t know a word，the best way is _______.
A. to ask your teacher
B. to look it up in a dictionary
C. to think hard
D. to do nothing
54. When you look up a word in the English-Chinese Dictionary，you should understand not only its Chinese meaning，but also ______.
A. its pronunciation
B. its part of speech
C. the use of it
D. A，B and C
55. Here are four words，「blind」，「murder」，「monument」 and 「boyhood」. Their right order in the English-Chinese Dictionary is ________.
A. blind，boyhood，murder，monument
B. blind，boyhood，monument，murder
C. boyhood，blind，monument，murder
D. monument，murder，blind，boyhood
56. The English-Chinese Dictionary is ________.
A. useful in learning Chinese
B. our good friend in learning Chinese
C. our good friend in learning English
D. not useful in learning English
(D)
Some people like to fish. Some like to build things. Others like to paint. George Washington Carver liked to grow things. He was happy when he was with flowers and plants. He liked farming.
Farmers of the south were glad that George Washington Carver felt this way. Thanks to Mr Carver，they grew good crops. Once southern farmers only planted cotton. But George Washington Carver said to them，「Plant peanuts. They will make your land rich. Your other crops will grow better.」 The farmers listened to him. They planted peanuts. Then they came to him again. Where could they sell thousands of peanuts?
Once again，George Washington Carver helped them. He found hundreds of ways for using peanuts. Butter and candy could be made from peanuts. Soap，oil，paint，and many other things would be made form peanuts，too. George Washington Carver was a black man. Today his work is known all over the world.
57. George Washington Carver liked to ________.
A. plant things
B. paint
C. fish
D. build things
58. Southern farmers liked Mr Carver because Mr Carver ________.
A. was a black man
B. was a farmer
C. helped them in farming
D. was happy when he was with flowers
59. From the story we can tell that _________.
A. Mr Carver is not well known now
B. southern farmers thanked Carver for cotton
C. southern farmers sold peanuts to Carver
D. George Washington Carver was a great scientist
60. The main idea of the whole story is that _________.
A. George Washington Carver helped the southern farmers
B. George Washington Carver is known as a black man
C. many things can be made from peanuts
D. planting peanuts can make land rich
第 II 卷
（非機讀卷 共35分）
一、根據句意及首字母，補全單詞。（共4分，每小題1分）
1. Her job is to sell clothes in the shopping center，she is a s_________.
2. English people』s family names come l__________.
3. All the students are out. N________ is at school.
4. They』re walking home after p________ oranges.
二、選用方框中詞或片語的適當形式填空。（其中有兩個是多餘的）（共3分，每小題1分）
exciting，careful，top，celebrate，taste
1. The ______ of the mountain is a good place for seeing the sun rising.
2. The soup _________ so delicious! Would you like some?
3. He writes much _____________ than me.
三、語言知識運用（2）（共10分，每小題2分）
根據中文意思完成句子。
1．我很高興你能來。
I』m __________________________________________.
2．謝謝你的卡片。
_____________________________________________your card.
3．火車站距離這條街有五公里遠。
______________________________________ from the street.
4．對你來說按時到校很容易做到。
It is easy_____________________________________________.
5．同學們都認為他不會彈鋼琴。
___________________________________________play the piano.
四、口語交際（共10分，每小題2分）
根據上下文的意思補全對話。在橫線上寫出所缺少的內容。
A: Hello. ____1____
B: Speaking.
A: Hi，David! This is John.
B: Hi，John. ____2____
A: We』re going to have a picnic this Saturday. ____3____
B: I』d love to. But I have to help mum with the housework.
A: What a pity! Are you free this Sunday?
B: Yes.
A: ____4____
B: That』s a good idea. I hear there is a good movie on show now.
A: ____5____
B: How about 6:00 p.m. at the gate of the cinema?
A: OK. See you then.
B. See you.
五、書面表達（共8分）
根據中文意思，寫出意思連貫、符合邏輯、50字左右的短文。
金秋是收獲的季節。進入初二以來你有了什麼收獲，對自己的下半學期和下半年以後有什麼打算？請你用英語來談一談你的收獲和打算。
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
❸ 初中計算題100道
38×99＋38 75× 299＋75 102×99＋102 39＋9×39
99×128 ＋128 27＋99×27 34＋199×34 35×99＋35
6.乘法分配律（三）：
125×（8＋80 ） （80＋4）×25 8×（125＋9） （20＋4）×25 32 ×（200＋3） （125＋17）×8
(100＋2)×99 102×（100－1） 25×(40＋4) （25＋100）×4 99×（100＋1） （125＋40）×8
（125＋25）×8 99 ×（100＋7） 8 ×(125＋7) (30＋25) ×4
7.乘法分配律（四）：
46×102 48×101 99×46 102×42 103×31 107×16 108×15 125×88
88×102 102×99 39×101 25×41 48×101 201 ×24 302×43 102×13
8.商不變的規律：
300÷25 4000÷125 240÷5 600÷25 3200÷50
400÷25 150÷25 800÷25 2000÷125 9000÷125
四、混合運算
672－672÷12×7 987÷（345－298）×65 210×[520÷(240－227)] 340－240÷20×5
30×(320－170)÷90 [458－(85＋28)]÷23 630×[840÷(240－212)] 408÷[512－(178＋283)]
864÷[(27－23)×12] (105×12－635)÷25 240－140÷5×3 360－260÷20×5
104×48＋272÷16 35＋65÷5－20 240＋180÷30×2 450÷30＋20×3
146－(34＋420÷70) 624÷[(27－14)×4] (77－21÷7)×691 (165－65÷5)×5
840÷[(120＋195)÷15] [557－(186＋26)]÷23 375÷（25－10）×15 （659－34）´（280¸40）
720¸［（12+24）´20］ 15×27-200÷8 （324-285）×12 ÷26 （160－48÷12）×4
336÷[（36－29）×6] 62×（300－145÷5） 35×（320－170）÷50 （36×54－984）÷24
150÷[90÷（67－52）] 659－34´（280¸40） 182÷[36÷（12＋6）] 640÷[（96-80）×4]
❹ 初中生練習題
關於啟東中學作業本和典中點我用過，啟東中學作業本題的難度主要在於教材中很多公式定理沒有學，可以作為定理補充，學習新知識的一個抓手，典中點在於整體思想上和一些具體方法上的練習，以及熱點題型的訓練，建議你根據自身情況，兩本都可以選，每一本上自己選擇生僻的題型多練習。純手打，望採納。
❺ 求初中全冊的練習題的書
我也讀初中，成績不錯，你說的我都有所了解。輕巧奪冠太簡單，《中學教材全解》和《教材完全解讀》，《點撥》，《倍速學習法》都是很基礎的，如果你成績很好，就應該給自己一些挑戰，建議《尖子生題庫》很不錯。如果你成績不是非常拔尖 ，建議《經典學法頻道》，也許能有所提高。
希望我的回答對你有所幫助，一起加油！
❻ 中學練習題~
1、-3KXY+1/3XY=0
K=1/9
2、解：設有X位成人觀眾。
50X+（200-X）*20=5770
X=59
答：有59位成人觀眾。
3、合作時間：（1-1/7.5*2）/（1/7.5+1/6）=22/9（小時）
前後共有多少小時是指一斑吧。
2+22/9=4又4/9（時）
答：略。
4、解：設一隊速度為X千米/小時。
（2+2）*X+2（X+1）=230
X=38
38+1=39（千米/時）
答：一隊速度38千米/時。二隊速度39千米/時。
5、解：設十位數為X。
X+5+X=（10X+X+5）*1/7+6
14X+35=11X+47
X=4
個位數字：5+4=9
兩位數：4*10+9=49
❼ 初中數學70,80分的學生做什麼練習題比較合適
現在很多的同學數學的分數都不是很高,這拉低的整體的平均分,所以很多的學生都會是做很多的練習題來改善這種問題,那麼初中數學練習題做的越多分數就會越高嗎?
數學習題
在做初中數學練習題的時候,家長不可以讓孩子做的過於多,需要給孩子一定的休息時間,以防止孩子出現過度勞累的情況,這樣只會讓分數出現下降並不會有上升的情況,所以只有詳細的制定計劃之後才可以在一定的程度上改善孩子的分數問題,還可以改善孩子的學習習慣,這對於孩子的以後有非常大的影響.
❽ 高中練習題有哪些
《典中點》，《高考題庫》，《世紀金榜》。