八年级（下）易错题
( ) . 1-- What happened to Jack?
-- He fell down and there is ______ his leg.
A. nothing with
B. wrong something with
C. something wrong with
D. anything wrong with
( ) 2. -- Daddy, I can’t walk any more. I’m tired.
-- Let’s ______.
A. go off
B. go to bed
C. get a break
D. take breaks
( ) 3. -- Furious 7 (激情7) became a ______ 3D film in the first half of 2015.
-- I think so. Millions of people have seen it.
A. heat
B. hit
C. recorder
D. hot
( ) 4. -- How can I open the door?
-- Just ______ the button and it will open.
A. beat
B. hit
C. step
D. press
( ) 5. Her parents have always made her ______ about herself, even when she was fourteen.
A. feeling good
B. feeling well
C. to feel well
D. feel good
( ) 6. -- Did you see the accident?
-- Yes, the car ______ the road and hit a tree.
A. run off
B. run out
C. run away
D. run down
( ) 7. It’s easy to ______ bad habits, such as smoking.
A. fall down
B. fall off
C. fall into
D. fall behind
( ) 8. -- The man did a lot of things to ______ for president(总统).
-- I think most of people will support him and vote (投票) for him.
A. get
B. run
C. fight
D. catch
( ) 9. -- What’s the result of the war?
-- The two ______ agreed to stop fighting.
A. sides
B. teams
C. directions
D. matches
( ) 10. The police ______ their search for the missing child because three days went by.
A. put up
B. looked up
C. picked up
D. gave up
( ) 11. -- Do n’t ______ what others said. Just be ______.
-- Thanks for believing me.
A. care, you
B. care, yourself
C. mind, you
D. think, yourself
( ) 12. Mother is sleeping, please ______ the children quiet.
A. ask
B. let
C. make
D. keep
( ) 13. -- Why didn’t you attend the meeting? It’s very important.
-- I ______ to, but I have a high fever.
A. hoped
B. wished
C. meant
D. expected
( ) 14. Dick ______ in America, but he has been ______ Chinese food since he moved to China.
A. used to live , used to eating
B. is used to live, used to eat
C. is used to live, used to eating
D. used to living, used to eat
( ) 15. -- A group of volunteers go to Green Lake Park to ______ litter every week.
-- Shall we join them?
A. stay up
B. pick up
C. set up
D. cheer up
( ) 16. Many social workers went to Qinghai to help ______ clean water and food to the people to reduce(减少) their pain from the earthquake.
A. put out
B. try out
C. work out
D. give out
( ) 17. -- I believe this is the best movie of the year.
-- Well, ______. Anyway, the ending is OK.
A. that’s a good idea
B. that may not be a good idea
C. I’m not sure if you’re right
D. I think you’re right
( ) 18. He ______ plenty of money to the people in the earthquake areas ______.
A. gave away, to help them out
B. put out, to work out well
C. handed out, help them out
D. gave out, work out well
( ) 19. In the poor village, villagers have to walk two kilometers to ______ clean water.
A. fetch
B. take
C. bring
D. carry
( ) 20. -- What can you see on the wall?
-- The ______ on the wall ______ “please wash you hands.”
A. sign, writes
B. sign, says
C. note, understands
D. notice, write ( ) 21. -- Could you see each other at 9:00 tomorrow morning?
-- Sorry, let’s ______ another time.
A, make it B. think of C. talk about D. come out
( ) 22. When you don’t know a word, you can ______ in a dictionary.
A. look it up
B. see it up
C. give it up
D. pick it up
( ) 23. -- All the students must ______ your homework before ten o’clock, or you will be punished.
A. hand out
B. hand in
C. hand over
D. hand on
( ) 24. Would you please ______ the music a little, Lily? I am learning English.
A. turn up
B. turn down
C. turn off
D. turn on
( ) 25. Attention, please! The plane will ______ in a minute. Every passenger please fasten your safety belt.
A. take up
B. take off
C. take over
D. take down
( ) 26. Again and again the doctor ______ the crying baby girl, but he couldn’t find out what was wrong with her.
A. looked over
B. looked after
C. looked for
D. looked out
( ) 27. -- So many problems! I’m tired.
-- You should try to ______ them by yourself. You are not a child any longer.
A. get into
B. get off
C. get on
D. get over
( ) 28. -- It’s everyone’s duty to join the Clean Your Plate Campaign.
-- Sure. We should try to ______ all the food that we ordered.
A. give up
B. eat up
C. turn up
D. show up
( ) 29. -- What smells terrible?
-- Sorry, I’ll ______ my shoes and wash them at once.
A, put away B. take away C. move away D. get away
( ) 30. If you want to buy this dress, you’d better ______ first to make sure it fits you.
A. pay for it
B. take if off
C. tidy it up
D. try it on
( ) 31. -- Who’s the most modest boy in your class?
-- Daniel. He never ______ in public.
A. gets off
B. takes off B. shows off D. turns off
( ) 32. Here is the book. First ______ it and then tell me what you think of it.
A. look into
B. look through
C. look up
D. look after
( ) 33. -- Would you ______ your bike to me?
-- Here you are.
A. borrow
B. lend
C. use
D. keep
( ) 34. When I’m in trouble, my best friends always ______ me ______.
A. get, out
B. give, out
C. take, out
D. help, out
( ) 35. -- Mom, look at the kite. I made it alone.
-- Good job, Charlie. I’m ______ of you.
A. ill
B. proud
C. sure
D. sick
( ) 36. It took the firemen several days to ______ the fire in Tianjin.
A. put out
B. put up
C. put on
D. put away
( ) 37. The rescuers looked around the hole, but found nor ______ of life.
A. symbol
B. signal
C. message
D. sign
( ) 38. After the war, they ______ to build their new home.
A. set up
B. set out
C. set off
D. set down
( ) 39. The restaurant is very famous. You’d better ______ seats right now.
A. book
B. take
C. order
D. get
( ) 40. -- It’s too hot. Would you mind my ______ the door?
-- ______. Please do it now.
A. to open, OK.
B. opening, Certainly not
C. opening, Of course
D. to open, Good idea
( ) 41. -- Why do you often go to this restaurant?
-- I like that restaurant because it ______ both delicious food and good service for us.
A. uses
B. gives
C. shares
D. provides
( ) 42. -- Shall we meet at 8o’clock next Sunday morning?
-- I won’t be free then. Let’s make it ______ day.
A. other
B. another
C. the other
D. others
( ) 43. -- Have a good rest. You need to ______ your energy for the football game this afternoon.
-- I will.
A. leave
B. save
C. hold
D. get
( ) 44. -- Do you ______ your son after school?
-- No. He comes back home on the school bus.
A. pick up
B. look after
C. drop in
D. send for
( ) 45. -- Could I use your dictionary, Sandy?
-- ______. But you have to return it to me this afternoon.
A. No problem
B. Yes, you could
C. I hope not
D. I’m sorry
( ) 46. Last Sunday I met John and he ______ me a ride.
A. took
B. asked
C. gave
D. had
( ) 47. -- Why were you late for the meeting this morning?
-- I ______ my way, so I ______ the first bus.
A. lost, lost
B. lost, missed
C. missed, missed
D. missed, lost
( ) 48. The mountain I visited last Sunday isn’t very famous. Few ______ go sightseeing there.
A. tourists
B. adults
C. researchers
D. passengers
( ) 49. Last Thursday when I got to the station, I ______ I had left my ticket at home.
A. understood
B. realized
C. believed
D. seemed
( ) 50. -- Could you tell ______?
-- At 9:30 tomorrow morning.
A. what time you arrived
B. who you are coming withe
C. when will you be here
D. what time you are arriving
( ) 51. -- What are the worker talking about?
-- They’re talking about how to ______ the wall.
A. put down
B. cut down
C. take down
D. fall down
( ) 52. -- Could you please tell me where we should have our picnic?
-- Well, that’s the ______.
A. matter
B. point
C. idea
D. feeling
( ) 53. I will do some cleaning as soon as I ______ my homework.
A. finish
B. will finish
C. has finish
D. finished
( ) 54. -- What smells terrible, Ted?
-- I’m sorry. I’ll ______ my shoes and wash them at once.
A. put away
B. take away
C. throw away
D. keep away
( ) 55. -- How much is the ticket to Central Park?
-- A one-way ticket ______ $40, and you can ______ another $20 for a round-trip.
A. costs, pay
B. costs, spend
C. pays, spend
D. spends, pay
( ) 56. Catherine got married ______ a policeman twenty years ago.
A. with C. for C. to D. about
( ) 57. -- You must always hide medicine ______ children, or they will take it by mistake.
-- Ok. I will remember.
A. from
B. of
C. about
D. behind
( ) 58. -- Do you have enough money to ______ all your daily expenses?
-- Oh, yes, enough to spare.
A. cover
B. spend
C. complete
D. offer
( ) 59. The trousers are too small and old. I need to buy a new______.
A. one
B. piece
C. couple
D. pair
( ) 60. The new couple ______ so happy that they couldn’t stop ______ when they got married.
A. was, smiling
B. were, smelling
C. was, to smell
D. were, to smell ( ) 61. -- Nobody knows which team will win the World Cup?
-- Yes. That’s the ______ of the beautiful game.
A. hope
B. magic
C. luck
D. question
( ) 62. -- Shall I give you a ride as you look so tired?
-- Thank you. ______.
A. It’s your duty
B. Don’t mention it
C. Do as you like
D. It couldn’t be better
( ) 63. -- What a day! It’s raining again.
-- Don’t worry. This weather won’t ______ long.
A. continue
B. keep
C. last
D. remain
( ) 64. -- I made a good mistake. That’s too bad.
-- Better make it up ______ it goes worse.
A. before
B. after
C. when
D. until
( ) 65. -- Chinese women’s volleyball team won the champion in the Olympic games.
-- Yeah, I watched the game and my spirit ______ at the news.
A. rose
B. calmed
C. turned
D. shook
( ) 66. You look nice in green. Green ______ you.
A. suits
B. fits
C. matched
D. be fit for
( ) 67. -- Whose advice should I take, Madam?
-- ______.
A. see yourself
B. That depends
C. OK
D. It’s up to you
( ) 68. -- What do you think of your school, Linda?
-- It’s a good place for us to ______ ourselves for the future.
A. promise
B. prove
C. prepare
D. prevent
( ) 69. -- There is still a copy of this book in the library. Will you go and borrow ______?
-- No, I will buy ______ in the bookstore.
A. one, it
B. one, one
C. it, one
D. it, it
( ) 70. There are many trees and flowers on ______ side of Yanjiang Road.
A. both
B. each
C. every
D. all
( ) 71. -- Do you have enough students to clean the hall?
-- No, I think we need ______ students.
A. another
B. two others
C. more two
D. two more
( ) 72. -- I’m sure Cindy has passed the interview.
-- Sure, her______ is heard everywhere today.
A. voice
B. laughter
C. sound
D. kindness
( ) 73. We all hope the space rocket will ______ safely on the stars.
A. land
B. send
C. meet
D. get
( ) 74. -- I’m very worried about tomorrow’s math test. I’m afraid I won’t pass this time.
-- Cheer up! I’m sure you’ll ______.
A. make well
B. successful
C. do it
D. make it
( ) 75. -- How did you know his meaning?
-- I knew it by reading between the ______ in his letters.
A. words
B. lines
C. meanings
D. records
( ) 76. -- Is Kate serious?
-- I ______. She never means it.
A. suppose
B. agree
C. believe
D. wonder
( ) 77. ______ is possible but hardly probably ______ his illness will get worse.
A. That, that
B. It, that
C. It. Whether
D. That, whether
( ) 78. -- Have you ever ______ late for school?
-- Yes. I ______ late yesterday.
A. been, come
B. gone, came
C. been, came
D. gone, come
( ) 79. It’s rather hot in the room. You’d better ______ the window or the door.
A. close
B. not to close
C. don’t close
D. not close
( ) 80. -- Have you heard the song Stay Here Forever?
-- Yes. It sounds ______.
A. well
B. loudly
C. sweet
D. beautifully
( ) 81. -- My computer doesn’t work. It needs ______ at once.
A. to repair
B. repair
C. repaired
D. repairing
( ) 82. -- How kind you are! You always do what you can ______ others.
A. help
B. helping
C. helps
D. to help
( ) .83 -- I don’t know where to go this summer vacation.
-- Why not ______ visiting Huanggang? There are many place of interest here.
A. suggest
B. wonder
C. consider
D. regard
( ) .84 -- Exercise me, I want to buy some stamps. Where can I find a post office?
-- I know ______ nor far from here. You can easily find ______.
A. that, it
B. it. One
C. one, it
D. it, it
( ) 85. -- The sweater is not ______ for me.
-- Well, shall I get you a bigger one.
A. expensive
B. bright
C. fit
D. small
( ) 86. -- Could you help me clean the classroom?
-- ______.
A. Yes, I could
B. It doesn’t matter
C. With pleasure
D. Don’t mention it ( ) 87. -- Does the price ______ everything?
-- Of course, it’s enough.
A. include
B. including
C. pay
D. reach
( ) 88. -- Both of us like reading very much.
-- Good habit. It can ______ your mind.
A. lose
B. rise
C. feel
D. feed
( ) 89. -- Let me carry that for you. It looks very heavy.
-- ______. I’m quite out of breath.
A. No, thanks
B. It’s very nice of you
C. Yes, of course
D. I’m afraid I can
( ) 90. -- The toy car ______ to my brother.
-- I think so. His name is on it.
A. owns
B. comes
C. belongs
D. has
( ) 91. -- Do you enjoy your trip to countryside?
-- Of course. The food is ______ but perfectly cooked.
A. single
B. simple
C. similar
D. simply
( ) 92. -- Would you like to climb the mountain this Sunday?
-- Yes, I’d live to. But if you don’t, ______.
A. so do I
B. so I will
C. neither do I
D. neither will I
( ) 93. -- What a heavy rain! I’m afraid it will last long.
-- ______. We’re getting into the rainy season now.
A. That’s possible
B. I’m afraid not
C. That’s impossible
D. I’m not sure
1—5 CCBDD 6—10 ACCAD 11—15 BDCAB 16—20 DCAAB 21—25 AABBB 26—30 ADBBD 31—35 BBBDB 36—40 ADBAB 41—45 DBBAA 46—50 CBABD 51—55 CBABA 56—60 CAADB 61—65 BDCAA 66—70 ADCCB 71—75 DBADB 76—80 D C CDC 81—85 DDCCC 86—90 CADBC 91—93 BDA
初二上英语易错题O(∩_∩)O~ Unit1 1.-The new restaurant is for500people。 -Great，let’s have a big party there. A.enough big B.big enough C.enough small D.small enough 正确答案：B 笔记：Enough修饰形容词和名词时的位置：名词前形容词副词后面 2.Money is important in my life.But it isn’t to me. A.something B.everything C.anything D.nothing 正确答案：B 3.--There are dark clouds,and the wind is blowing strongly. --It_____that a typhoon is coming. A.feels B.looks C.seems 正确答案：C go and buy some. 4.There is_____milk left,let’ｓ A.a little B.little C.few 正确答案：B 笔记：milk为不可数名词，使用little修饰，a little为“一些”，little为“很
少，一点点”，表否定 5.We went to the beach and had fun____in the sea on vacation. A.swimming B.swam C.swim 正确答案：A 解析：had fun/have a good time后跟动词ing 6.--How was the food there? --It tasted_____but I was so hungry the I ate a lot. A.awful B.enjoyable C.delicious 正确答案：A 7.--Can you make salad? a piece of cake.__________canmake it. --Sure.It’ｓ A.someone B.Anyone C.Noone 正确答案：B 8.--What do you think of your vacation,Cathy? --Oh,it was great!We had a(n)_________time in Sydney. A.wonderful B.enough C.tired 正确答案：A
八年级下易错题集（一） 一．选择题（共16小题） 1．代数式中，分式的个数是（） 2．已知对任意实数x，式子都有意义，则实数m的取值范围是（） 3．（龙岩模拟）当式子的值为零时，x等于（） 4．若分式的值为正，则x的取值范围是（） ＞﹣﹣且5．分式中的x，y同时扩大3倍，则分式的值（） 是原来的6．下面各分式：，其中最简分式有（）个． ． 分钟分钟C 分钟 D． 分钟 8．计算的结果为（） C D． 9．计算的结果是（） D．10．（鸡西）若关于x的分式方程无解，则m的值为（） 11．（扬州）若方程=1有增根，则它的增根是（）
．C D． 13．（金华）小明在一直道上骑自行车，经过起步、加速、匀速、减速之后停车．设小明骑车的时间为t（秒），骑．C D． ﹣0.5x﹣1中，一次函数有（） 14．下列函数：①y=﹣8x、②、③y=8、④y=﹣8x2+6、⑤y= ） 16．已知点（﹣4，y1），（2，y2）都在直线y=﹣x+2上，则y1，y2大小关系是（ 18．（清远）计算：（π﹣3）0+2﹣1=_________． 19．等腰三角形的周长是16，写出底边长y与一腰长x的函数关系式____，自变量x的取值范围是________．20．（贵州模拟）在函数y=中，自变量的取值范围是_________． 21．已知函数y=（k﹣1）x+k2﹣1，当k_________时，它是一次函数，当k=_______时，它是正比例函数．22．（包头）若一次函数y=ax+1﹣a中，y随x的增大而增大，且它的图象与y轴交于正半轴，则|a﹣1|+= _________． 23．（襄阳）若一次函数y=2（1﹣k）x+k﹣1的图象不过第一象限，则k的取值范围是_________． 24．将直线y=2x沿x轴的正方向平移1个长度单位，得到直线_________． 25．直角坐标系中，直线y=2x+3关于原点对称的解析式为_________． 三．解答题（共5小题） 26．通分：，．
“ 八年级下册第二章微粒的模型与符号易错题整理 一、选择题 1．下列图片中，不属于模型的是（ ） 2．若用“ ”表示氢原子，用 ”表示氧原子，保持水的化学性质的最小粒子可表示为 （ ） A ． B ． C ． D ． 3．氩气是一种惰性气体，若 以●表示氩原子，则氩气是以下列（ ）形式存在。 4．请你分析下列事实，其中能证明分子是可分的是（ ） A ．冷却热饱和硝酸钾溶液有硝酸钾晶体析出 B ．海水晒干得到食盐 C ．水通电得到氢气和氧气 D ．水受热变成水蒸气 5．用 分别表示质子、中子和电子，如图表示四种原 子结构模型，有关说法正确的是（ ） A ．甲、丁互为同位素 B ．乙、丁为同一种元素 C ．甲、丙的核电荷数不同 D ．甲、丙为同一种原子 6 ． 核内有 n 个质子，核外有（ n － 3 ）个电 子的微粒是 甲 乙 丙 （ ） A ．原子 B ．分子 C ．阳离子 D ．阴离子 7．贝克勒尔首先发现原子具有放射性，即原子能自动放射出一些粒子。一种元素的原子经过放射变成 了另一种元素的原子，则此原子放射出的粒子一定是（ ） A ．电子 B ．中子 C ．质子 D ．原子核 8．某元素原子 A 的质子数为 12，已知 B 2-和 A 2+具有相同的电子层结构，则 B 元素原子的质子数为（ ） A ．8 B ．9 C ．10 D ．11 9．据科学家预测，月球的土壤中吸附着数百万吨的 前人类一年消耗的能量。在地球上氦元素主要以 ，每百吨 核聚变所释放出的能量相当于目 的形式存在。下列说法正确的是（ ） A ． C ． 原子核内含有 4 个质子 B ． 原子核内含有 3 个中子 D ． 和 是两种不同的元素 的最外层电子数为 2 10．以下概念错误的是（ ） A ． 同种元素的原子构成的分子是单质分子 B ．同位元素原子构成的分子不是化合物分子 C ．同种元素组成的物质一定是单质 D ．不同的分子混合物的物质中可以只有一种元素 11．图为元素周期表中氟元素的相关信息，下列说法错误的是（ ） A ．氟原子核内质子数为 19 B ．氟元素为金属元素 C ．氟元素的相对原子质量为 19.00g D ．氟原子内所有粒子的总和约为 28 12．某种电池的正极材料由锂（Li ）、钴（Co ）和氧元素组成，三种元素的化合价分 别是+1、+3、-2，则该物质的化学式为（ ） A ．LiCoO B ．LiCoO 2 C ．LiCoO 3 D ．LiCoO 4 13．元素 X 的原子最外层上有 1 个电子，元素 Y 的原子外层上有 6 个电子，则 X 、Y 两元素可形成的
2018年初三二模易错题强化训化1 1、下列运用相同科学方法研究的是 （1）同一直线上力的合成 （2）用水流比作电流 （3）用磁感线描述磁场 （4）串联电路的总电阻 A （1）与（3） B （2）与（4） C （2）与（3） D （1）与（4） 2．甲、乙两物体同时同地沿同一直线做匀速运动，它们的s -t 图象如图1所示。由图象可知 A 甲通过的路程一定比乙大 B 甲的速度一定比乙小 C 经过6秒，甲乙一定相距3米 D 甲乙间距离一定随着时间的增加而增大 3．如图2所示，行李托运时，行李箱随水平传送带一起做匀速直线运动。以下说法中属于一对平衡力的是 A 传送带对行李箱的推力与行李箱所受的摩擦力 B 行李箱对传送带的压力与传送带对行李箱的支持力 C 传送带对行李箱的支持力与行李箱所受的重力 D 行李箱所受的重力与行李箱对传送带的压力 4．在如图3所示电路中，电源电压保持不变。将滑动变阻器的滑片向右移动，电压表V 与电流表A 的比值变大。关于电键的通断，下列说法中正确的是 ①电键S 1闭合，S 2断开 ②电键S 1闭合，S 2闭合 ③电键S 1断开，S 2断开 ④电键S 1断开，S 2闭合 A ①② B ②③ C ①②④ D ①②③ 图1 图2 图 3
5.甲、乙两个正方体放置在水平地面上，如图4（a ）、（b ）所示，它们对地面的压强分别为P 甲和P 乙。将它们沿竖直方向切下相同比例的部分后，再把甲切下部分放在甲剩余部分的下方，把乙切下部分放在乙剩余部分的上方，如图4（c ）、（d ）所示，此时它们对地面的压强变为P 甲'、P 乙'。若P 甲'=P 乙'，则下列判断中正确的是 A P 甲一定小于P 乙' B P 甲'一定大于P 乙 C P 甲可能大于P 乙 D P 甲'可能等于P 乙 4. D 5.D 6.C 7.C 8.B 6.小敏用橡皮筋系着体积为2×10-3米3的金属球先后浸没在水中、某液体中，手提橡皮筋上端，待球静止后现象如图6所示。金属球在水中受到的浮力为 （13） 牛。金属球在水中、某液体中所受合力分别为F 1和F 2，则F 1 （14） F 2；若某液体的密度为ρ液，则ρ水 （15） ρ液。（后两空均选填“大于”、“等于”或“小于”） 7.在如图7所示的电路中，电源电压为4.5伏，若电路中仅有一处故障，且只发生在电阻R 、灯L 上。电键S 闭合前后，电压表指针的位置不变，且灯不亮，请根据相关信息写出电压表的示数及相应的故障 （16） 。 13.（13）19.6； （14）等于； （15）大于。 14.（16）电压表示数为4.5伏，灯短路或电阻断路； （2分） 电压表示数为0伏，灯断路。 （2分） 图4 (a) (b) (c) (d) 图6 液 水 某液体 图7 图8
1、Every year many c came to the Himalayas. 2、She r her own life to help a disabled woman. 3、The football match has to be put off next week because of the s . 4、Did you know that China is oneof （old）countries in the world？ 5、Qomolangma is higher than any other （mountain）in the world. 6、There are many (difficult) in the world.It’s a lot bigger than the population of the US. 7、China is larger than in Aria. A、any countries B、any country C、any other country D、all the countries 8、You speak English as as Tom . A、good；does B、good；is C、well ；does D、well；is 9、The math problem is to work out.A、much difficult B、more difficult C、difficult enough D、too difficult 10、The Pacific Ocean is 155.6 million square kilometers in 11、It’s not so as yesterday，so there are people sitting in the square。A、colder；fewer B、warmer；fewer C、cold；more D、warm；more 12、Which of the two girls is Jack’s sister? A、The tallest B、T aller one C、The taller one D、Taller 13、Usually Xiao Li spends time doing homework than Xiao Chen does . A、little B、less C、few D、fewer 14、He has a lot of work every day. A、do B、to do C、doing D、done 15、He always lies in bed and helps his wife to do anything A、ever B、always C、never D、usually
八年级下册易错题 第一章 三角形的证明 1.已知等腰三角形的两边长分别为5㎝、2㎝，则该等腰三角形的周长是（D ） A ．7㎝ B ．9㎝ C ．12㎝或者9㎝ D ．12㎝ 考查知识点：三角形的基本知识及等腰三角形边的关系：任意两边之和大于第三边，等腰三角形两腰相等， 因此只能是：5cm ，5cm,2cm. 2.一个等腰三角形的一个角是40°，则它的底角是（D ） A ．40° B ．50° C ．60° D ．40°或70° 考查知识点：三角形的内角和及等腰三角形两底角相等：①当40°是顶角时，底角就是70°；②40°就是一个底角. 3.已知△ABC 的三边长分别是6cm 、8cm 、10cm ，则最长边上的高是（D ） A.2.4cm B.3cm C.4cm D. 4.8cm 提示：设最长边上的高为h,由题意可得△ABC 是直角三角形，利用面积相等求，即 h .10.2 1 8.6.21 解得h=4.8 4.等腰三角形一腰上的高与另一腰的夹角为300 ，腰长为6，则其底边上的高是3或33. 解：①三角形是钝角三角形时，如图1，∵∠ABD=30° ∴AD= 21AB=2 1 36=3， ∵AB=AC ， ∴∠ABC=∠ACB= 21∠BAD=2 1 (90°-30°)=30°， ∴∠ABD=∠ABC ， ∴底边上的高AE=AD=3； ②三角形是锐角三角形时，如图2，∵∠ABD=30° ∴∠A=90°-30°=60°， ∴△ABC 是等边三角形， ∴底边上的高为 2 3 36=33 综上所述，底边上的高是3或33 5.到三角形三个顶点的距离相等的点是三角形（B ）的交点. A.三个内角平分线 B.三边垂直平分线 C.三条中线 D.三条高 考查的知识点：三角形三边垂直平分线的交点到到三角形三个顶点的距离相等【归纳为：点到点距离相等，为垂直平分线上的点】还有一个：三角形三个内角平分线的交点到三角形三
八年级上科学好题、易错题精选推荐（二） 1．某研究性学习课题小组，在教师的指导下，完成了“水的体积随温度变化”的研究，得到如右图的图线。根据这个图线，说明水的温度从8℃降低至2℃的过程中，等体积的水的质量（ c ） A、先变小后变大 B、保持不变 C、先变大后变小 D、一直变大 2．下列关于水的性质的叙述中，属于化学性质的是（ D ） A、降温到0℃，水结成冰 B、加热到100℃，水变成水蒸气 C、水蒸气遇冷，凝结成水 D、给水通电，生成氢气和氧气 2．对密度定义式ρ=m/V的下列几种理解中，正确的是（D ） A、密度与物体的质量成正比 B、密度与物体质量成正比，与其体积成反比 C、密度与物体的体积成反比 D、密度是物质本身的一种特性与物体的质量和体积无关 4．人们常说“铁比木头重”，这句话的实际含义是（C ）A、铁的质量比大头大 B、铁的重力为比木头大 C、铁的密度比木头大 D、木头的体积比铁大 5．人的密度跟水的密度差不多，请估算一个中学生的体积最接近下列哪一个值（ B ） A、50m3 B、50dm3 C、50cm3 D、50mm3 6．古人称黄河是“一石水，六斗泥”，经测定黄河水每立方米的平均含沙量约为35kg，合每立方厘米含沙量约为 （ D ）
A、1 g B、1 g C、3.5×10-1g D、3.5×10-2g 7．一只最多能装下500克水的瓶子，也能装下500克的（ D ）物质柴油酒精汽油浓硫酸密度（千克/米3）0.85×1030.80×1030.71×103 1.84×103 A、柴油 B、酒精 C、汽油 D、浓硫酸 8．天平两端各放一块铝块和铁块，天平平衡，则铝块和铁块的质量之比是 1:1 ，密度之比是 27:79 ，体积之比是 79:27 。 9．有四个容量都为500毫升的瓶子，分别装满海水、纯水、酒精和汽油，那么装的质量最多的是（ρ海水＞ρ纯水＞ρ酒精＞ρ汽油） （ A ） A、海水 B、纯水 C、酒精 D、汽油10．一支正在燃烧的蜡烛，它的（ A ） A、质量不断减少，密度不变 B、质量不断减少，密度也减小 C、质量不变，密度也不变 D、质量不变，密度减小 11．医院里有一人氧气瓶，它的容积是10dm3，里面装有密度为2.5kg/m3的氧气，某次抢救病人里去了5g氧气，则瓶内剩余氧气的密度为（ B ） A、1 kg/m3 B、2 kg/m3 C、2.2 kg/m3 D、2.5 kg/m3 12．关于压力，下列说法正确的是（ C ） A、压在物体表面上的力叫压力 B、压力的大小一定等于物体的重力 C、压力的方向一定垂直于受压物体表面 D、压力的方向一定垂直于水平地面 13．书包带宽5cm，与肩部接触部分长度为35cm，总质量为7kg，小红选择这种书包的理由及她肩部所受压强大小正确的是（ A ）书包带有两条 A、减小压强；2×103Pa B、增大压强；2×102Pa C、减小压强；2×104Pa D、减小压力；2.45Pa
2018年新人教版二年级下册易错题整理 1、想一想，算一算。 （1）☆+☆+☆=18 △+☆=14 ☆=（）△= （） （2）●×■=18 ■÷●=2 ●=（）■=（） （3）○+○+○=6 △+△+△=12 ○+△=（） 2、下列哪些图形是轴对称的（）？ A B C 3、从食堂买回30棵白菜，吃了15棵，还剩多少棵？剩下的白菜5天吃完，平均每天吃几棵？ 4、判断：把18个苹果分成9份，每份有2个苹果。（） 5、解决问题：学校有一条30米长的小路，平均每隔5米载一棵树，这条小路能载多少棵树？（两端都要载） 6、（第三单元）下列属于旋转现象的是（）。 A、踢毽子 B、玩碰碰车 C、捉迷藏 D、荡秋千
7、（同步训练）一堆糖果比40块多，比50块少，平均分给张丽和她的7位同学，正好分完。这堆糖果共有多少块？ 8、（第四单元）在（）里面最大能填几？÷ （）×7<55 45÷5>（）26>（）×6 7<40÷（）30÷（）<7 9、口算 32-4= 18+9= 10、在（）里填上适当的数。 4×2=16÷（）36÷4=27÷（） 11、小明和小兰比赛写毛笔字，小明3分钟写27个字，小兰5分钟写35个字，他们俩谁写的快？ 12、从35里面减去（）个5，结果是5。 13、判断：把18个苹果分成9份，每份有两个苹果。（） 14、看谁算的又对又快。 54÷9×7= 34+6×8= 70-3×6= 6×7-32= 56÷8+29= 6×6÷4= 48-19-19= 78-26-22= （）÷8=8 15、小明串珠子，按两个红珠子，3个黄珠子，4个绿珠子的顺序，一共串了81颗。 ①第81颗珠子是什么颜色的？
2013版新目标英语八年级上册1---5单元易错题复习：一、单项选择 ( )1.---How were the people in that country ? --- ___________. A It was pretty good. B They went to the beach. C They were friendly. D They were friends. ( )2.The cakes ________ good . Can I have some more ? A sound B taste C feel D smell ( )3. ----Frank, you look worried. Anything wrong ? ---Well, I _________ a test and I’m waiting for the result. A will take B took C am taking D take ( )4.---Jim, please help______ to some bread. --- Thank you. A himself B yourself C herself D myself ( )5. This TV play can be very interesting ,but ___________ can be enjoyable unless you like it. A anything B something C everything D nothing ( )6.Can I ask you _________ questions ? A any B a C some D an ( )7.We took __________ photos yesterday . A quiet a few B quite few C quite a little D quite a few ( )8.We didn’t go to the movies_________ the weather. A because of B because C so D because in ( )9.I felt ________ when I heard the __________ news. A exciting , excited B excited , exciting C exciting , exciting D excited , excited ( )10. Yesterday was as__________ as today. A hot B hotter C very hot ( )11.----Where did you go on vacation? ----_________. I could hear birds sing. It was very interesting. A I went to a bookstore. B I visited the museum. C I learned to play the violin. D I went to the mountains. ( )12.I had_________ useful umbrella when it rained. A a B an C / D the ( )13. -----___________Nancy at home last weekend? ---- No, she _________. She was in the library with her friends. ( )14.----Did you visit your grandma on Friday evening ? ---- No, I_______ to a wonderful movie with my mother. A didn’t go B go C went D did went ( )15.I never feel________ when I say with him because he is such a ___________ man. A boring , bored B boring , funny C bored, boring D bored , funny
初二英语易错题 1._______ (take) an online tour, you need a computer connected to the internet. 2. _______ (take) exercise every day keeps us strong and healthy. 3._______ (take) care of yourself when traveling abroad. 4.You’d better _________ (not take) photos here. 5..He ran as fast as he could ______ (catch) the bus. 6.He spent as much money as he could ______ (help) us. 7.Plan to visit some _______ (island) countries this summer holiday. 8. --Must I finish the job today? --No, you ________ 或_______ . 9. --May I use your computer? --No, you ________ 或_______ . 10.Can I ______ (借) your book? 11. Can you ______ (借) your bike to me? 12. How long can I ______ (借) the book? 13. My pen is broken. I want to buy _____ ( 一支). 14. The beaches in Qingdao are more beautiful than _____ (that) in Shanghai. 15. The beaches in Qingdao are more beautiful than the _____ (one) in Shanghai. 16. The weather in Changzhou is much warmer than ______ (that) in Beijing. 17.--Look! I _______ (buy) a new camera.
浙教版八下科学生物易错题(有答案)
1、下列几组植物中，与大豆根系相同的一组是（） A.大麦、洋葱、甘蔗 B.玉米、红萝卜、韭菜 C．苹果、大白菜、樟树 D.狗尾草、水稻、高粱 2、水体发生富营养化污染时，鱼类等水生动物大量死亡的因是 （） A.水体中的氮、磷营养元素过多 B.藻类植物大量死亡 C．.水体中的溶解氧急剧减少 D.水体中的微生物大量繁殖 3、下列使用盐水情况和盐水所起的主要作用不能对应的是 （） A、在制泡菜时，用盐水浸泡蔬菜，维持细胞正常形态 B、感冒时用盐水漱口，消毒杀菌 C、人在高温作业后，要喝些淡盐水，维持体内水、盐代谢平衡 D、用0.9g％生理盐水制作口腔上皮细胞装片，维持细胞正常形态 4、拆列工厂排出的废水最有可能造成土壤生物性污染的是（） A.屠宰场 B.化工厂 C.电镀厂 D.造纸厂 5、木本植物的茎，从外到内依次是（） A.树皮、韧皮部．形成层、木质部、髓
B.树皮、木质部、形成层、韧皮部、髓 C.树皮、木质部、形成层、髓、 D.树皮、形成层、木质部、髓 6、收集橡胶胶乳时往往要割橡胶树，为使胶乳顺利流出，正确 的割胶方式是应该割到橡胶树的哪个部位（） A.木质部 B.内树皮的韧皮部 C.形成层 D.外树皮的韧皮部 7、物体进行的下列活动中受到气孔开闭影响的是（） ①水分的吸收和运输；②无机盐的运输作用；③光合作用；④ 呼吸作用；⑤蒸腾作用 A．①②④⑤ B.②③④⑤ C．①②③④D．①②③④⑤ 8、王芳在采集的野外生长的植物的茎的横切面上，发现有5个年 轮，而中间的年轮特狭小。访问当地人得知，该地年降水量丰富，气温比较高，导致植物年轮特窄最可能的原因是（）A．干旱 B.气温 C.蝗灾 D.缺植物生长的无机盐 9、对于绿色植物而言，光照增强，光合作用就会随之增强，但在
2018年小学科学毕业考易错题专项掌握情况（选择题）测试班级学号姓名得分 1.妈妈买了一包标注为350克的食盐，程欣想用弹簧测力计称一下这包盐是否足重，下面哪种量程的测力计最合适（） A.0—0.5N B.0—1N C.0—5N 2.下列垃圾中可以自然分解的是（） A.塑料袋和菜叶 B.可乐瓶和食品包装袋 C.蛋壳和纸屑 3.下图中，把同一物体提高到相同高度，最省力的是（） A沿着斜面 B直接提起 C用定滑轮 4.为了探究横梁的抗弯曲能力和横梁厚度的关系，实验时需要改变的条件是（） A.横梁的跨度 B.横梁的厚度 C.横梁的宽度 5.我们每天所看到的月亮升落方向是（） A.东升西落 B.西升东落 6.被取消为大行星资格的是（） A.金星 B.海王星 C.冥王星 7.大气中的（）浓度增加，使得地球表面温度升高。 A.二氧化硫 B.二氧化碳 C.一氧化碳 8.下图的装置，哪一个是定滑轮？（）
9.不倒翁不倒的原因是（） A.形状是球形 B.下部特别大 C.底部特别重 10.电茶壶烧水的过程中，电能转化成（） A.热能 B.动能 C.光能 11.下列能源中，属于可再生能源的是（） A.石油 B.风能 C.煤 12.下列植物中，属于草本植物的是（） A.葱兰 B.雪松 C.杜鹃花 13.昆虫的身上都长有（） A.二对足 B.三对足 C.二对翅膀 14.科学探究小组设计完成了一组对比实验，如下图所示。请判断他们是在研究（） A.电磁铁的磁力大小与哪些因素有关 B. 电磁铁的磁力大小南北极与哪些因素有关 C. 电磁铁与磁铁的相同点和不同点。 15.生活中，往锁孔中加一点铅笔芯的粉末，是为了（） A.减少摩擦力 B.增大摩擦力 C.预防生锈 16.锅铲柄往往是用塑料或者木头制作的，这是因为塑料和木头都是（） A.热的良导体 B.热的不良导体 C.重量轻，价格便宜 17. 图中的三个摆，哪个摆摆动的快（） 18. 下列几种情况可能平衡的是（）。
重庆育才中学 八年级上Units1-6易错基础题 班级_________ 姓名_________ 一、用所给单词的适当形式填空。 1.I’m spending time ____________(visit) my friends in China. 2.____________(cook) is fun, so I like ____________(cook). 3.Don’t make so much noise, my grandpa ____________(sleep). 4.Her father ____________ (leave) for Beijing in three days. 5.It’s December now, the New Year ____________(come). 6.Lisa decides ____________ (pay) 100 for that beautiful coat. 7.Annie finished ____________ (do) her homework just now. 8.Do you need ____________ (watch) your son when he is playing? 9.We felt ____________ (excite) because of the _____________ (excite) movie. 10.The sad end of the movie made us ____________ (cry). 11.It takes about 30 minutes ____________ (get) from my home to school. 12.Is it difficult ____________ (do) the math exercises? https://www.doczj.com/doc/b017998394.html,st year, Eric always ____________ (ride) to school. 14.Do you know if they are ____________ (plan) for their vacation? 15.David, why not ____________ (go) out to play football? 16.Oh, I am so sorry ____________ (tell) that you got an F in the test. 17.Tomorrow is April ____________ (twelve). 18.Are there any ____________ (man) clothes selling in the store? 19.With ____________ (who) will you go? 20.I am ____________ (bad) at math than last year. 21.You are too serious, can you be ____________(friendly). 22.Mike is ____________ (funny), and Jack is ____________ (funny), too. 23.This picture is far ____________ (beautiful) than that one. 24.Maria is ____________ (later) of the two girls. 25.Her mother is ____________ (busy) of her parents. 26.It’s winter now; the weather is getting ____________ (cold and cold). 27.The ____________ (few) exercises you do, the ____________ (difficult) you may feel. 28.She got ____________ (little) water than I ____________ (do). 29.My dictionary is ____________ (new) than ____________ (he). 30.Alicia, who do you think is ____________ (lazy) of the two ____________ (woman doctor)? 31.My father ____________(exercise) every day last year. 32.I went to the park ____________ (two) a week. 33.Sometimes we went ____________ (swim) in the river when we were young. 34.My favorite sport is ____________ (play) table tennis. 35.____________ (drink) a lot of water is good for you. 36.He’d like _____________ (skate) today because he likes ___________ (skate). 37.Tom is often ill, I think he is kind of ____________ (health).
【最新北师大版】数学八下易错题(含答案)
八年级下册易错题
第一章 三角形的证明
1.已知等腰三角形的两边长分别为 5 ㎝、2 ㎝，则该等腰三角形的周长是（D ）
A．7 ㎝
B．9 ㎝
C．12 ㎝或者 9 ㎝
D．12 ㎝
考查知识点：三角形的基本知识及等腰三角形边的关系：任意两边之和大于第三边，等腰三
角形两腰相等，
因此只能是：5cm，5cm,2cm.
2.一个等腰三角形的一个角是 40°，则它的底角是（D）
A．40° B．50°
C．60°
D．40°或 70°
考查知识点：三角形的内角和及等腰三角形两底角相等：①当 40°是顶角时，底角就是 70°；
②40°就是一个底角.
3.已知△ABC 的三边长分别是 6cm、8cm、10cm，则最长边上的高是（D）
A.2.4cm
B.3cm
C.4cm
D. 4.8cm
提示：设最长边上的高为
1 .6.8 1 .10.h
2
2
h,由题意可得△ ABC 是直角三角形，利用面积相等求，即
解得 h=4.8
3 4.等腰三角形一腰上的高与另一腰的夹角为 30 ，腰长为 6，则其底边上的高是3 或
3.
0
解：①三角形是钝角三角形时，如图 1，∵∠ABD=30°
11 ∴AD= 2 AB= 2 ×6=3，
∵AB=AC，
1
1
∴∠ABC=∠ACB= 2 ∠BAD= 2 (90°-30°)=30°，
∴∠ABD=∠ABC，
∴底边上的高 AE=AD=3；
②三角形是锐角三角形时，如图 2，∵∠ABD=30°
∴∠A=90°-30°=60°，
∴△ABC 是等边三角形，
∴底边上的高为
3 ×6=3 2
3
综上所述，底边上的高是
3
3 或
3
5.到三角形三个顶点的距离相等的点是三角形（B）的交点. A.三个内角平分线 B.三边垂直平分线 C.三条中线 D.三条高 考查的知识点：三角形三边垂直平分线的交点到到三角形三个顶点的距离相等【归纳为：点 到点距离相等，为垂直平分线上的点】还有一个：三角形三个内角平分线的交点到三角形三
第三章第一至三节易错题 14．科学课上做“用红磷燃烧测定空气中氧气的体积分数”的实验时，由于红磷燃烧生成的P2O5对人体有一定危害，小明改用氢气燃烧来测定空气中氧气的体积分数，设计的实验装置如 图。实验时用夹子b夹住橡胶管，打开夹子a，点燃纯净的氢气并迅速插入集气瓶中， 使氢气在集气瓶中燃烧。 （1）当氢气燃烧的火焰刚好熄灭时，对夹子的操作应是_ __。 （2）实验测得集气瓶中氧气的体积远小于瓶中空气体积的1/5，写出一种可能的原因：。 （3）有同学提出，若用CO取代H2，进行如上操作也能完成氧气体积分数的测定。你是否认同？并简要说明理由：。 15 （1） A．检查装置的气密性 B．燃烧匙中的红磷足量 C．点燃红磷后缓慢将燃烧匙插入瓶中，塞紧瓶塞 D．红磷熄灭，广口瓶冷却后打开弹簧夹 （2）小明同学用足量的木炭代替红磷、氢氧化钠溶液代替水来做此实验。小明操作正确，但是测得的数据小于用红磷测得的数据，其原因是木炭燃烧除生成二氧化碳外还可能生成____。 （3）市售“暖宝宝”中发热剂主要成分是：铁粉、碳粉、水和食盐等，反应原理可简化为铁生锈。小明用配制的发热剂按图乙装置进行实验。他不是将足量的发热剂堆在瓶底，而是将其涂抹在广口瓶内壁的四周，这样做的目的是__ __。 （4）在上述三个实验操作都正确的情况下，与另两个实验的测量结果相比，第三个实验的测量结果与空气中的氧气含量更接近。推测其主要原因，最合理的是。 19．某研究小组在学习氧气的化学性质时发现：铁丝燃烧没有火焰，蜡烛燃烧却有明亮的火焰。该小组同学进行了如下探究。 （1）探究一：蜡烛燃烧产生火焰的原因是什么？ 点燃蜡烛，将金属导管一端伸入内焰，导出其中物质，在另一端管口点燃，也有火焰产生。由此可知：蜡烛燃烧产生的火焰是由__ __（选填“固态”或“气态”）物质燃烧形成的。 （2）探究二：物质燃烧产生火焰的根本原因是什么？ __ _ 度有关。由此推测：钠在燃烧时，_ _（选填“有”或“没有”）火焰产生。 （3）木炭在氧气中燃烧没有火焰，但生活中木炭燃烧时会产生火焰，其原因可能是__ _。 10．质量相等的两份药品a和b，a是混有少量高锰酸钾的氯酸钾，b是纯净的氯酸钾，将两药品分别同时加热，则收集到氧气的质量随反应时间变化图像如下，正确的是（）
科学七年级(上)各章易错题集 衢江区莲花初中黄紫仙 第一章 1.一罐普通的可口可乐或雪碧易拉罐的体积最接近（） Ａ.３５０升Ｂ.３５０毫升Ｃ.３５升Ｄ３.５毫升 ２.关于质量，下列说法中正确的是（） Ａ.体积大的物体质量也大Ｂ.物体从地球送上月球质量不变 Ｃ.物体的温度升高时质量会增大Ｄ.水结成冰后质量会增大 3、下图所示的四个图中,能正确测出圆柱体截面直径的方法是（） 4．某同学要称取50克水，操作方法曾经做过以下几步：(1)称量一只100ML的烧杯质量为m (2)加水到天平平衡(3)调节天平平衡(4)再在右盘加50克砝码(5)拿下烧杯整理天平。其中正确的操作顺序是( ) A．（1）（2）（3）（4）（5）B．（3）（2）（1）（4）（5）C．（3）（1）（4）（2）（5）D．（1）（5）（3）（2）（4）5．托盘天平在称量时若右盘稍上翘，则表示（） A．砝码的质量比物体的质量大，应向左移动游码。 B．砝码的质量比物体的质量大，应向右移动游码。 C．砝码的质量比物体的质量小，应向左移动游码。 D．砝码的质量比物体的质量小，应向右移动游码。 6．感受身边的物理——质量为1.5×106mg的物体最可能的是（） A．一只母鸡B．一头大象C．一头奶牛D．一只蚊子 7．用托盘天平称量物体的质量时，将被称物体和砝码放错了位置，若天平平衡时，左盘放有100克和50克的砝码各1个，游码所对的刻度值是6克，则物体的质量为（）A．156克B．150克C．144克D．154克 8. 用皮尺测量长度是，如果皮尺没有充分拉直来测量，那么测量结果将( ) A．偏大B．偏小C．不受影响D．不能确定 9．有一支温度计刻度不准，将温度计放在冰水混合物中示数是-3℃，放在一标准气压下的沸腾的水中的示数为97℃，若放在室内空气中示数是20℃，则室内空气的实际温度是（）A．17℃B．20℃C．23℃D．19.2℃ 10、一只温度计刻度均匀但示数不准，在一个标准大气压下，将它放入沸水中示数为 95℃；放入冰水混合物中，示数为5℃；把该温度计悬挂在教室的墙壁上，其示数为32℃。教室的实际温度是（） A、27℃ B、30℃ C、32℃ D、37℃ 11、小明有一支特殊的温度计，它的刻度是均匀的，但读数不够正确，在冰水混合物中的读数是40C，放在1标准大气压下的沸水里的读数是960C，用这支温度计测一杯水的读数为200C，你能帮他算算这杯水的实际温度吗？（） A、160C B、17.40C C、18.40C D、240C 12、某同学用体温计给一位生病的同学量体温,结果读数为38.４℃,该同学在未甩的情况下, 又用该温度计分别给生病的甲．乙．丙三位同学量体温，测得结果：甲为38.４℃,乙为 39.6℃,丙为39.6℃,则( ) A．只有甲的正确B．.只有乙的正确 C．只有丙的正确D．.乙肯定正确,甲和丙也可能正确