海口八年级期末考试答案

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海口八年级期末考试答案(一)
海南省海口市2014-2015学年八年级英语上学期期末考试试题

海南省海口市2014-2015学年八年级英语上学期期末考试试题 时间：90分钟 满分：100分 得分：

听力部分（20分）

Ⅰ．听句子选图画（共5小题，每小题1分，满分5分）

看图听句子，选出与句子意思一致的图画。每个句子读一遍。

A B C D E

1. ________ 2. __________ 3. __________ 4. __________ 5. __________ Ⅱ．听句子选答语（共5小题，每小题1分，满分5分） 根据你所听到的句子，选出正确的答语。每个句子读两遍。

( ) 6. A. I’m sorry to hear that. B. Yes, I’d love to. C. Don’t worry.

( ) 7. A. That must be fun. B. That’s too bad. C. I agree with you.

( ) 8. A. For two hours. B. At 8:00. C. Every day.

( ) 9. A. Never mind! B. What a pity! C. Good idea!

( ) 10. A. Yes, I was. B. Yes, I am. C. Yes, I did.

Ⅲ．对话理解（共5小题，每小题1分，满分5分）

根据你所听到的对话内容，选出最佳选项。每段对话读两遍。

( ) 11. What’s Bruce’s hobby?

A. Playing basketball. B. Going cycling. C. Reciting poems.

( ) 12. Why did the houses fall down and people die?

A. Because of the typhoon. B. Because of the earthquake.

C. Because of the flood.

( ) 13. How many kinds of animals did Lily see on the farm?

A. 4. B. 5. C. 6.

( ) 14. How does Amy chat with her friends?

A. By QQ. B. By msn. C. By Wechat.

( ) 15. What time did John come back home last night?

A. At 9:00. B. At 9:45. C. At 10:15. Ⅳ．短文理解（共5小题，每小题1分，满分5分）

根据你所听到的短文内容，选出最佳选项。短文读两遍。

1

( ) 16. The accident happened ________ the writer’s house.

A. next to B. in front of C. at the back of

( ) 17. The writer’s father was ________ at that time.

A. doing housework B. reading a newspaper C. watching TV

( ) 18. ________ thought the noise(噪音) from the accident was terrible.

A. The writer B. The writer’s mother C. The writer’s sister

( ) 19. Kitty is the writer’s pet ________.

A. dog B. rabbit C. cat ( ) 20. The writer thought the accident happened because ________.

A. the drivers drove too fast

B. the drivers didn’t drive carefully

C. the drivers couldn’t see clearly

笔试部分 （80分）

Ⅴ．单项选择。（共20小题，每小题1分，满分20分）

A）单词辨音 找出画线部分与其他单词发音不同的选项。（5分） ( ) 21. A. hen B. check C. fever ( ) 22. A. cover B. solve C. doll ( ) 23. A. singer B. longer C. stronger ( ) 24. A. army B. quarter C. dark ( ) 25. A. search B. appear C. learn

B）选择填空 从A、B、C三个选项中选出一个能填入空白处的最佳选项。（15分）

( ) 26. Ann’s father often goes fishing ________ his free time.

A. in B. on C. at

( ) 27. Chinese tigers are ________ oldest type of tigers in the world.

A. a B. an C. the

( ) 28. —________ you use to swim in the sea?

—No. I usually swam in a pool.

A. Do B. Are C. Did

( ) 29. I want to write down the phone number. Do you have any ________?

A. glue B. paper C. scissors

( ) 30. Mr. Lee is very ________. Most of the students are afraid of him.

A. serious B. kind C. funny

( ) 31. Music can ________ people with happiness and comfort.

A. give B. provide C. bring

( ) 32. —What about walking to the hill?

—No way. It’s ________ far to go there on foot.

A. too B. so C. very

( ) 33. I study in a school with over two ________ students.

A. thousand B. thousands C. thousands of

( ) 34. —Were you at home at 10:00 yesterday morning?

—Yes. I ________ an English movie on TV.

2

A. watch B. watched C. was watching

( ) 35. The winter holidays are coming. Where did you decide ________ them?

A. spend B. spending C. to spend

( ) 36. My uncle came ________ we were having dinner.

A. while B. until C. after

( ) 37. —Which do you like better, rabbits or monkeys?

—________. I think both of them are lovely.

A. I think so B. It’s hard to say C. Just

so-so.

( ) 38. Let’s ________ the information about Mars on the Internet.

A. look for B. find out C. put up

( ) 39. Look! ________ carefully Li Ming is reading English!

A. How B. What C. What a

( ) 40. Hainan ________ Wenchang Chicken. Many people like eating it.

A. is famous for B. is good at C. is popular with

Ⅵ．完形填空（共10小题，每小题1分，满分10分）

阅读下面短文，掌握其大意，从每小题所给的A、B、C三个选项中选出最佳选项。 Dear Angela, I have a piece of good news to tell you. My cousin, Judy, is coming to 41 my family this weekend. She works at an aquarium(水族馆) and she is going to stay with us for two 42 . Would you like to join 43 ? I know you want to be a marine biologist(海洋生物学家) when you 44 . Judy is a fan of marine biology. She can tell you many stories about sharks and other sea life. I’m sure you will be 45 in them.

By the way, we are planning 46 for this weekend. If you come, I can pick you up on Friday afternoon and we’ll go home together. That evening we’re going to have a big dinner. Mother says she will 47 much delicious food for us. On Saturday afternoon, we will have a party for my cousin. On 48 morning we can go to the Sea World and then in the afternoon, we’ll have to say 49 to my cousin because she will go back.

Please come with us, you’ll enjoy meeting Judy, 50 she’ll enjoy meeting you, too. Please write back soon.

Yours,

Elizabeth

( ) 41. A. help B. visit C. call

( ) 42. A. days B. weeks C. months

( ) 43. A. them B. us C. him

( ) 44. A. stay up B. give up C. grow up

( ) 45. A. happy B. excited C. interested

( ) 46. A. a lot B. a little C. a few

( ) 47. A. send B. prepare C. feed

( ) 48. A. Sunday B. Monday C. Tuesday

( ) 49. A. hello B. thanks C. goodbye

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( ) 50. A. but B. and C. so

Ⅶ．阅读理解（共10小题，每小题2分，满分20分）

阅读下列两篇语言材料，根据语言材料的内容，从每小题所给的A、B、C三个选项中，选出能回答所提问题或完成所给句子的最佳选项。

A

Henry was from London and he came to New York for a holiday.【海口八年级期末考试答案】

One day he didn’t feel well. So he went to the waiter at the desk of his hotel and said, “I want to see a doctor. Can you give me the name of a good one?” The waiter looked in a book, and said, “Mr. Grey can help you.”

“Is he expensive?” Henry asked.

“Well,” the waiter answered, “he always asks for his patients(病人) two dollars for their first visit and one dollar for later visit.”

Henry decided to save one dollar. When he went to see the doctor, he said, “I come here again, doctor.” For a few seconds, the doctor looked at his face carefully but didn’t say anything. Then he said, “Oh, yes.” He looked him over and then said, “Everything is going well. Just go on with the medicine I gave you last time.”

( ) 51. Henry is in ________ now.

A. China B. England C. America ( ) 52. Mr. Grey is a ________.

A. waiter B. doctor C. patient

( ) 53. Henry paid Mr. Grey ________ dollar(s).

A. one B. two C. three

( ) 54. Henry told the doctor he came again because ________.

A. he was badly ill B. he wanted to save one dollar

C. he liked the doctor

( ) 55. From the passage we know Henry got ________ from the doctor.

A. the medicine B. some advice C. nothing

B

Please look at the photo on the Internet. They call it

the “great queue of China”. It was a picture showing a

visitor on the Great Wall near Beijing during the National Day. Behind him were thousands of heads of other visitors.

The famous travel spots(景点) in Beijing like the Great Wall,

the Palace Museum and Tian’anmen Square, welcomed more than

180,000 visitors in a single day.

In the desert at Dunhuang, Gansu, it is reported that at least two camels(骆驼) died from overwork because too

many visitors rode them. And the rode traffic was up by 13% on last year, causing terrible jams(堵塞). It seems that everyone was on the road or on the train during the seven-day vacation. Thousands of cars stopped on the highways. They couldn’t move for many hours. However, most of people weren’t surprised or annoyed. Instead, they had lots of ideas to kill the time on the road. They read books, played badminton, walked dogs and even had a picnic. People usually do these things at the park, at the gym or at home. But during the seven-day vacation, they could be seen on many

highways in China.

4

( ) 56. The visitor took the photo on the Great Wall in ________.

A. September B. October C. November

( ) 57. The camels at Dunhuang died because they were too ________.

A. tired B. old C. thin

( ) 58. People ________ when they couldn’t move on the highways.

A. played basketball B. dance to music C. had a picnic

( ) 59. The underlined word “annoyed” means “________” in Chinese.

A. 恼怒的 B. 伤心的 C. 害怕的

( ) 60. Which of the following is TRUE?

A. The visitor showed his photo on the Great Wall in a newspaper.

B. Tian’anmen Square welcomed more than 180,000 visitors in a day.

C. Most Chinese people spend the seven-day vacation traveling.

Ⅷ．情景对话（共5小题，每小题1分，满分5分）

根据对话内容，从方框内选出能填入空白处的最佳选项，其中有两项为多余项。

A：Helen, what are you doing there?

B： 61

A：A book? What is it about?

B： 62

A：What animals do you like best?

B： 63 But there are fewer pandas now.

A：Yes. So we must protect them.

B： 64

A：I think we should protect forests first because they are the homes of pandas. B：You’re right. 65

A：That’s a good idea. Li Ming is good at drawing. Let’s find him now.

61._________ 62. _________ 63. _________ 64. _________ 65. _________ Ⅸ．词汇（共10小题，每小题1分，满分10分）

A)

66. How many __________________ and sheep does the man have?

67. Jack’s room is much _________________ than Eric’s.

68. Kate is fond of ______________ stamps.

69. Mobile phones are more and more _______________ now.

70. Listen ! The children are singing in the classroom _____________.

B）根据句意及词首字母或汉语提示，补全单词。

5

海口八年级期末考试答案(二)
2013—2014第一学期海口市八年级数学期末检测题A(含答案)

2013—2014学年度第一学期

海口市八年级数学科期末检测题（A卷）

时间：100分钟 满分：100分 得分：

一、选择题（每小题2分，共28分）

在下列各题的四个备选答案中，只有一个是正确的，请把你认为正确的答案的字母代号填写在下表相应题号的方格内.

1．(-3)2的平方根是

A．3

B. ±3 C．±3 D．9

2．下列说法中，正确的是 A．=±4

B. -32的算术平方根是3

D. -是7的一个平方根

C. 1的立方根是±1

3．若a²2²23=28，则a等于 A. 4

B. 8 C. 16 D. 32

4．计算(-2xy)2÷xy2，正确的结果是 A. 2x B. 4x 5. 下列算式计算结果为x2-x-12的是

A. (x+3)(x-4) B. (x-3)(x+4) C. (x-3)(x-4) D. (x+3)(x+4) 6．等腰△ABC的周长为8cm，AB=2cm，则BC的长为 A．2 cm

B．3 cm

C．4 cm

D．2或3 cm

C. 2 D. 4【海口八年级期末考试答案】

7. 某人将一枚质量均匀的硬币连续抛10次，落地后正面朝上6次，反面朝上4次，下列说法正确的是

A．出现正面的频率是6 B．出现正面的频率是4 C．出现正面的频率是40% D．出现正面的频率是60%

八年级数学（A卷） 第1页（共6页）

8．下列条件中，不能判断一个三角形是直角三角形的是 ．．

A. 三条边的比为1:2:3 B. 三条边满足关系a2=b2-c2 C. 三条边的比为1:1:2 D. 三个角满足关系∠B+∠C=∠A 9．如图1，已知AD=CB，AB=CD，AC与BD交于点O，则图中全等三角形共有 A．1对 B．2对 C．3对

D．4对

10．如图2，在△ABC中，AB=AC，∠BAC=100°，AD是BC边上的中线，且BD=BE，

则∠ADE的大小为

A．10° B．20° C．40° D．70°

图1 B

B

D 图2

C

B

图3

C

11．如图3，在△ABC中，DE垂直平分BC，若AB=8，AC=6，则△ADC的周长等于

A．11 B．13 C．14 D．16

12. 如图4，OC平分∠AOB，CD⊥OB于D，点P是射线OA上的一个动点，若CD=8，

OD=6，则PC的最小值为 A. 6

B. 7

C. 8

D. 10

13. 如图5，在△ABC中，∠ABC=60°，∠C=45°，AD是BC边上的高，∠ABC的角平分

线BE交AD于点F，则图中共有等腰三角形

A. 2个 B. 3个 C. 4个 D. 5个

B

图4

D 图5

C

图6

14．如图6，在△ABC中，∠ACB=90°，AC=BC，顶点A、B、C恰好分别落在一组平行线中的三条直线上，若相邻两条平行线间的距离是2个单位长度，则△ABC的面积是 A. 24 B. 48 C. 50 D. 100

八年级数学（A卷） 第2页（共6页）

二、填空题（每小题3分，共12分） 15. .5 . 16. 若m2+6m=2，则(m+3)2= .

17．如图7，所有阴影部分的四边形都是正方形，所有三角形都是直角三角形，已知正方

形A、B、C的面积依次为2、4、3，则正方形D的面积为___________．

图7 图8

18. 如图8，在△ABC中，AB=AC=12，BC=8，D为AB的中点，点P在线段BC上以每

秒2个单位的速度由B点向C点运动，同时，点Q在线段CA上以每秒x个单位的速度由C点向A点运动．当△BPD与以C、Q、P为顶点的三角形全等时，x的值为 . 三、解答题（共60分）

19. 计算（第（1）、（2）小题每题4分，第（3）小题6分，共14分）

（1）(3x -1)(3x+2)-(-3x)2； （2）(2a-3b)2-2a(2a-3b)；

（3）先化简，再求值：(x-2y)(-2y-x)-(x-2y)2，其中x=3，y=y

八年级数学（A卷） 第3页（共6页）

2

. 3

20．把下列多项式分解因式(每小题4分，共8分).

（1）4x3-xy2； （2）4(x+y)2-16xy.

21．（6分）图9是我国古代数学家赵爽的“勾股方圆图”，它是由四个全等的直角三角形

与中间的一个小正方形拼成的一个大正方形. 如果大正方形的面积是12，小正方形的面积是2，直角三角形的两直角边分别是a和b，求(a+b)2的值.

22．（9分）某校为了了解本校八年级学生课外阅读的喜好，随机抽取该校八年级部分学生

进行问卷调查（每人只选一种书籍）．图10.1和图10.2是整理数据后绘制的两幅不完整的统计图，请你根据图中提供的信息，解答下列问题：

图9

人数 100 80

60 40 20 0

小说

漫画 科普常识 其他 种类 图10.1

（1）这次活动一共调查了 名学生；

（2）在图10.2中，“漫画”所在扇形圆心角为 度； （3）补全条形统计图.

图10.2

八年级数学（A卷） 第4页（共6页）

23．（10分）如图11，已知△ABC．利用直尺和圆规，根据要求作图，并解决后面的问题． （1）作△ABC的角平分线AD；

（2）作∠CBE=∠ADC，BE交CA的延长线于点E；

（要求：保留作图痕迹，不需写作法和证明） （3）图中线段AB与线段AE相等吗？证明你的结论． 八年级数学（A卷）A

B C

图11

第5页（共6页）

海口八年级期末考试答案(三)
海南省海口市2014-2015学年八年级上学期期末考试数学试题及答案

2014—2015学年度第一学期

海口市八年级数学科期末检测题

时间：100分钟 满分：100分 得分：

一、选择题（每小题2分，共28分）

在下列各题的四个备选答案中，只有一个是正确的，请把你认为正确的答案的字母代号填写在下表相应题号的方格内.

1．(-4)2的平方根是

A．16

B. 4

C．±4 D．±2

2．下列说法中，正确的是 A．9=±3

B. 64的立方根是±4

D. 0.01的算术平方根是0.1

C. 6平方根是 3．下列计算正确的是

A．a2·a3=a6

B．3a2-a2=2 C．a8÷a2=a6

D．(-2a)3=-2a3

4. 计算x2-(x-1)2，正确的结果是

A．1

B．2x-1 C．-2x+1 D．-2x-1

5. 下列算式计算结果为x2-4x-12的是

A.(x+2)(x-6) B.(x-2)(x+6) 6．比较22，3，7的大小，正确的是

A．7＜3＜22

B．2＜7＜3

C.(x+3)(x-4)

D.(x-3)(x+4)

C．＜22＜3 D．22＜3＜7 7．下列四个命题中，它的逆命题成立的是

A．如果x=y，那么x2=y2 B. 直角都相等

C. 全等三角形对应角相等 D. 等边三角形的每个角都等于60°

8．等腰三角形ABC的周长为20cm，AB=8cm，则该等腰三角形的腰长为

A．8cm B．6cm C．4cm

D．8cm或6cm

9. 如图1，在△ABC中，∠A=90°，∠ABC的平分线交AC于点D，若AB=4，AD=3， 则点D到BC的距离为 A．3

B．4 C．5 D．6

10．如图2，在△ABC中，AB=AC，∠BAC=108°，点D在BC上，且BD=AB，连接AD，

则∠CAD等于 A．30°

图1

B

D【海口八年级期末考试答案】

C

A

a

B．36° C．38° D．45°

A

图2

11．如图3，直线a、b相交于点O，∠1=50°，点A在直线a上，直线b上存在点B，使

以点O、A、B为顶点的三角形是等腰三角形，这样的B点有 A. 1个

B. 2个

C. 3个

D. 4个

12．用反证法证明命题：在一个三角形中，至少有一个内角不大于60°. 证明的第一步是

A. 假设三个内角都不大于60°

B. 假设三个内角都大于60°

C. 假设三个内角至多有一个大于60° D. 假设三个内角至多有两个大于60° 13．某校随机抽取了八年级50名男生立定跳远的测试成绩，根据如下统计表，可求得

A．n=8，x=0.4 B．n=8，x=0.16 C．n=8，x=0.5 D．n=8，x=0.8

C 图4

l3

l

1l2

14．直线l1∥l2∥l3，且l1与l2的距离为1，l2与l3 的距离为3．把一块含有45°角的直角三

角板如图4放置，顶点A、B、C恰好分别落在三条直线上，则△ABC的面积为 A．

25

4

B．

25 2

C．12 D．25

海口八年级期末考试答案(四)
海南省海口市2014-2015学年八年级上学期期末考试英语试题及答案

2014—2015学年度第一学期

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海口市八年级英语科期末检测题 时间：90分钟 满分：100分 得分： 听力部分（20分） Ⅰ．听句子选图画（共5小题，每小题1分，满分5分） 看图听句子，选出与句子意思一致的图画。每个句子读一遍。 A B C D E 1. ________ 2. __________ 3. __________ 4. __________ 5. __________ Ⅱ．听句子选答语（共5小题，每小题1分，满分5分） 根据你所听到的句子，选出正确的答语。每个句子读两遍。 ( ) 6. A. I’m sorry to hear that. B. Yes, I’d love to. C. Don’t worry. ( ) 7. A. That must be fun. B. That’s too bad. C. I agree with you. ( ) 8. A. For two hours. B. At 8:00. C. Every day. ( ) 9. A. Never mind! B. What a pity! C. Good idea! ( ) 10. A. Yes, I was. B. Yes, I am. C. Yes, I did. Ⅲ．对话理解（共5小题，每小题1分，满分5分） 根据你所听到的对话内容，选出最佳选项。每段对话读两遍。 ( ) 11. What’s Bruce’s hobby? A. Playing basketball. B. Going cycling. C. Reciting poems. ( ) 12. Why did the houses fall down and people die? A. Because of the typhoon. B. Because of the earthquake. C. Because of the flood. ( ) 13. How many kinds of animals did Lily see on the farm? A. 4. B. 5. C. 6. ( ) 14. How does Amy chat with her friends? A. By QQ. B. By msn. C. By Wechat. ( ) 15. What time did John come back home last night? A. At 9:00. B. At 9:45. C. At 10:15.

Ⅳ．短文理解（共5小题，每小题1分，满分5分）

根据你所听到的短文内容，选出最佳选项。短文读两遍。

( ) 16. The accident happened ________ the writer’s house.

A. next to B. in front of C. at the back of

( ) 17. The writer’s father was ________ at that time.

A. doing housework B. reading a newspaper C. watching TV

( ) 18. ________ thought the noise(噪音) from the accident was terrible.

A. The writer B. The writer’s mother C. The writer’s sister

( ) 19. Kitty is the writer’s pet ________.

A. dog B. rabbit C. cat

( ) 20. The writer thought the accident happened because ________.

A. the drivers drove too fast

B. the drivers didn’t drive carefully

C. the drivers couldn’t see clearly

笔试部分 （80分）

Ⅴ．单项选择。（共20小题，每小题1分，满分20分）

A）单词辨音 找出画线部分与其他单词发音不同的选项。（5分）

( ( ( ( ( B）选择填空 从A、B、C三个选项中选出一个能填入空白处的最佳选项。（15分）

( ) 26. Ann’s father often goes fishing ________ his free time.

A. in B. on C. at

( ) 27. Chinese tigers are ________ oldest type of tigers in the world.

A. a B. an C. the

( ) 28. —________ you use to swim in the sea?

—No. I usually swam in a pool.

A. Do B. Are C. Did

( ) 29. I want to write down the phone number. Do you have any ________?

A. glue B. paper C. scissors

( ) 30. Mr. Lee is very ________. Most of the students are afraid of him.

A. serious B. kind C. funny

( ) 31. Music can ________ people with happiness and comfort.

A. give B. provide C. bring

( ) 32. —What about walking to the hill?

—No way. It’s ________ far to go there on foot.

A. too B. so C. very

( ) 33. I study in a school with over two ________ students.

A. thousand B. thousands C. thousands of

( ) 34. —Were you at home at 10:00 yesterday morning?

—Yes. I ________ an English movie on TV.

A. watch B. watched C. was watching

( ) 35. The winter holidays are coming. Where did you decide ________ them?

A. spend B. spending C. to spend

( ) 36. My uncle came ________ we were having dinner.

A. while B. until C. after

海口八年级期末考试答案(五)
海南省海口市2014-2015学年八年级上学期期末考试数学试题及答案

2014—2015学年度第一学期

海口市八年级数学科期末检测题

时间：100分钟 满分：100分 得分：

一、选择题（每小题2分，共28分）

在下列各题的四个备选答案中，只有一个是正确的，请把你认为正确的答案的字母代号填写在下表相应题号的方格内.

1．(-4)2的平方根是

A．16

B. 4

C．±4 D．±2

2．下列说法中，正确的是 A．9=±3

B. 64的立方根是±4

D. 0.01的算术平方根是0.1

C. 6平方根是 3．下列计算正确的是

A．a2·a3=a6

B．3a2-a2=2 C．a8÷a2=a6

D．(-2a)3=-2a3

4. 计算x2-(x-1)2，正确的结果是

A．1

B．2x-1 C．-2x+1 D．-2x-1

5. 下列算式计算结果为x2-4x-12的是

A.(x+2)(x-6) B.(x-2)(x+6) 6．比较22，3，7的大小，正确的是

A．7＜3＜22

B．2＜7＜3

C.(x+3)(x-4)

D.(x-3)(x+4)

C．＜22＜3 D．22＜3＜7 7．下列四个命题中，它的逆命题成立的是

A．如果x=y，那么x2=y2 B. 直角都相等

C. 全等三角形对应角相等 D. 等边三角形的每个角都等于60°

8．等腰三角形ABC的周长为20cm，AB=8cm，则该等腰三角形的腰长为

A．8cm B．6cm C．4cm

D．8cm或6cm

9. 如图1，在△ABC中，∠A=90°，∠ABC的平分线交AC于点D，若AB=4，AD=3， 则点D到BC的距离为 A．3

B．4 C．5 D．6

10．如图2，在△ABC中，AB=AC，∠BAC=108°，点D在BC上，且BD=AB，连接AD，

则∠CAD等于 A．30°

图1

B

D

C

A

a

B．36° C．38° D．45°

A

图2

11．如图3，直线a、b相交于点O，∠1=50°，点A在直线a上，直线b上存在点B，使

以点O、A、B为顶点的三角形是等腰三角形，这样的B点有 A. 1个

B. 2个

C. 3个

D. 4个

12．用反证法证明命题：在一个三角形中，至少有一个内角不大于60°. 证明的第一步是

A. 假设三个内角都不大于60°

B. 假设三个内角都大于60°

C. 假设三个内角至多有一个大于60° D. 假设三个内角至多有两个大于60° 13．某校随机抽取了八年级50名男生立定跳远的测试成绩，根据如下统计表，可求得

A．n=8，x=0.4 B．n=8，x=0.16 C．n=8，x=0.5 D．n=8，x=0.8

C 图4

l3

l

1l2

14．直线l1∥l2∥l3，且l1与l2的距离为1，l2与l3 的距离为3．把一块含有45°角的直角三

角板如图4放置，顶点A、B、C恰好分别落在三条直线上，则△ABC的面积为 A．

25

4

B．

25 2

C．12 D．25

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