hel
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Help mik v
Gọi `D` là trung điểm của `BH`
Kẻ `DF` vuông góc `AB` tại `D;DF=AB`
Xét `\triangleFDB` và `\triangleBAC`:
`DF=AB`
`\hat{FDB}=\hat{BAC}=90^o`
`DB=AC`
`=>\triangleFDB=\triangleBAC{c.g.c)`
`=>FB=BC;\hat{FBD}=\hat{BCA}`
`=>\hat{FBD}=90^o - \hat{ABC}=15^o`
`=>\hat{FBC}=\hat{ABC} - \hat{FBD} = 60^o`
Xét `\triangleBFC`, có: `FB=BC=>\triangleBFC` cân tại `B`
Mà `\hat{FBC}=60^o =>\triangleBFC` đều
`=>FC=FB=BC` (*)
Ta có: `F\in` trung trực `BH=>FH=FB` (**)
Từ (*)(**)`=>FH=FC=FB`
Xét `\triangleHFB`, có: `FH=FB=>\triangleHFB` cân tại `F`
Mà `\hat{HBF}=15^o =>\hat{HFB}=180^o -2\hat{HBF}=150^o`
Ta có: `\hat{HFC} + \hat{HFB} + \hat{BFC} = 360^o`
`=>\hat{HFC}=360^o - 150^o - 60^o`
`=>\hat{HFC}=\hat{HFB}=150^o`
Xét `\triangleHFC` và `\triangleHFB`:
`HF` chung
`FC=FB`
`\hat{HFC}=\hat{HFB}`
`=>\triangleHFC=\hat{HFB}(c.g.c)`
`=>\hat{FHC}=\hat{FHB}`
`=>\hat{BHC}=2\hat{FHB}=2\hat{FBH}=30^o`
`=>\hat{BHC}=30^o`
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Hel
p
a) xét tam giác ABD và tam giác ACE có:
góc A:chung (gt)
góc AEC = góc BDA =90 độ (gt)
suy ra tam giác ABD = tam giác ACE ( g.g )
tù đó suy ra: AE trên AD = AC trên AB và = AE . AB = AC . AD
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Hel
p me!!!
V.
1. D.was --> did
2. B.to --> bỏ to
3. D.careless --> carelessly
4. B.brings --> bring
VI.
1. C.up
2. A.breakfast
3. drink
6. A.in
7. C.does
8. B.watches
9. B.at
10. D.favourite
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Hel
p Me !!!
my hobby is collecting comics. I started my hobby 2 years ago. My mother took me to the bookstore and bought some comics for me.I like reading comics for me. I like reading comics in my freetime because it helps me relax. I spend all lucky money to buy comics. I find this hobby interesting because comics make me funny and excited.
I hope that in the future, i'll have a big bookshelf of comics to read them.
Hơi ngắn, xin lỗi nhé !
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I have many hobbies, but I like reading most. Books are always a good friend to me. It is a good way to improve my vocabularies by exposing many new words.I star to reading book when i in grade 3.my brother inspired me to do that.I usualy share my hobby with my friend and my english teacher.By reading, I get better at concentration because it requires me to focus on what I am reading for long periods. It also opens up the knowledge door for me. Reading books tell me about the world's history, let me see the structure of the brain, or bring me a story of Sherlock Holmes. I think reading is one of the most interesting indoors activity and I will keep this hobby forever.
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_____________ you (get) _____________ up late this morning?Hoang (not come) ___________________ home late yesterday evening.What _____________ you (have)_____________ for lunch yesterday?Where _____________ Nam (go) _____________ last summer?Liz (help) _____________ me a lot with my housework last week.He (buy) ___________________ me some flowers last night.I (get) ___________________ a terrible headache last night.He (knew) ___________________ him long time ago.We (eat) ___________________ some...
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_____________ you (get) _____________ up late this morning?
Hoang (not come) ___________________ home late yesterday evening.
What _____________ you (have)_____________ for lunch yesterday?
Where _____________ Nam (go) _____________ last summer?
Liz (help) _____________ me a lot with my housework last week.
He (buy) ___________________ me some flowers last night.
I (get) ___________________ a terrible headache last night.
He (knew) ___________________ him long time ago.
We (eat) ___________________ some fish for dinner tomorrow.
My friends (travel) _______________ to Da Nang next week.
Last night, we (not watch) _____________________ TV.
My teacher (return) _____________________ here soon
He (teach) _____________________ us last year.
Her father (take) _______________ her daughter to the dentist.
Mai (make) _____________________ a big cake yesterday.
There (be) _____________________ a storm here soon.
She (drink) _____________________ a lot of beer last night.
My mother (cook) _____________________ dinner tonight.
Hai (not arrive) _____________________ here soon.
_______________ you (give) _______________ her a present?
Loan (help) __________________ me do housework yesterday.
I (not have) _____________________ any close friends last year.
They (not obey) __________________ their teacher last time.
____Do________ you (get) ___get__________ up late this morning?
Hoang (not come) ________didn't come___________ home late yesterday evening.
What ___did__________ you (have)___have__________ for lunch yesterday?
Where _______did______ Nam (go) ______go_______ last summer?
Liz (help) ______helped_______ me a lot with my housework last week.
He (buy) ________bought___________ me some flowers last night.
I (get) __________got_________ a terrible headache last night.
He (knew) ________knew___________ him long time ago.
We (eat) _______will eat____________ some fish for dinner tomorrow.
My friends (travel) ______will travel_________ to Da Nang next week.
Last night, we (not watch) ______didn't watch_______________ TV.
My teacher (return) _______have returned______________ here soon
He (teach) ________taught_____________ us last year.
Her father (take) _____takes__________ her daughter to the dentist.
Mai (make) ______made_______________ a big cake yesterday.
There (be) _______has been______________ a storm here soon.
She (drink) _________drank____________ a lot of beer last night.
My mother (cook) _______will cook______________ dinner tonight.
Hai (not arrive) ___________hasn't arived__________ here soon.
______Are_________ you (give) _____giving__________ her a present?
Loan (help) ________helped__________ me do housework yesterday.
I (not have) ________didn't have_____________ any close friends last year.
They (not obey) _______didn't obey___________ their teacher last time.
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So sánh đặc điểm dân cư khu vực Bắc Mĩ với dân cư khu vực Trung và Nam Mĩ
HEL ME !!!
Sự phân bố dân cư :
- Dân cư Bắc Mỹ phân bố không đồng đều giửa phía tây và phía đông, miền bắc và miền nam.
- Mật độ dân số thấp nhất là phía bắc Canada và bán đảo A-la-xca dưới 1 người/km2 kế đó là miền núi Coóc-đi-e Hoa Kỳ.
- Mật độ dân số cao nhất là vùng đông bắc Hoa Kỳ: từ dải đất phía nam Hồ Lớn đến duyên hải Đại Tây Dương. Mật độ dân số trên 100 người/km2
- ¾ dân số Bắc Mỹ sống ở thành thị.
- Trong các năm gần đây, phân bố dân cư Bắc Mỹ có sự thay đổi nhất là trên lãnh thổ Hoa Kỳ, có sự chuyển dịch dân cư trên lãnh thổ Hoa Kỳ từ các vùng công nghiệp phía nam Hồ Lớn và Đông Bắc ven Đại Tây Dương hướng về phía nam và vùng duyên hải phía tây ven Thái Bình Dương do sự phát triển mạnh các ngành công nghiệp mới.
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*Giống nhau :
Cấu trúc điạ hình tương tự nhau đều chia làm ba phần: núi trẻ phía Tây, đồng bằng ở giữa, núi già ở phiá Đông.Địa hình kéo dài theo chiều kinh tuyến.
*Khác nhau:
-Bắc Mĩ:
+Phía Đông:núi già Apalat và sơn nguyên trên bán đảo Labrađa.
+Ở giữa: Đồng bằng trung tâm cao ở phía Bắc, thấp dần về phía Nam.
+Phía Tây:Hệ thống Cooc-đi-e cao trung bình (3000-4000m) và đồ sộ chiếm một nửa lục địa Bắc Mĩ.
-Trung và Nam Mĩ:
+Phía Đông sơn nguyên Guy-a-na và sơn nguyên Brazin.
+Ở giữa: là chuỗi đồng bằng nối liền nhau: Ô-ri-nô-cô-> Amadôn-> Laplata-> Pama. Các đồng bằng đều thấp, trừ đồng bằng Pama có điạ hình cao ở phía Nam.
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IV.Choose the best answer A, B, C or D. 21. If you spend …………… time on music, you will forget the stress. A. less B. little C. most D. more 22. People can help the homeless and the poor in many …………… A. streets B. food C. things D. ways 23. The neighbourhood was cleaned up this morning, …………… there is no rubbish now. ...
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IV.Choose the best answer A, B, C or D.
21. If you spend …………… time on music, you will forget the stress.
A. less B. little C. most D. more
22. People can help the homeless and the poor in many ……………
A. streets B. food C. things D. ways
23. The neighbourhood was cleaned up this morning, …………… there is no rubbish now.
A. although B. so C. but D. and
24. …………… a new hobby and you will have more friends.
A. Take care of B. Take after C.Take up D. Take over
25. My village is not …………… it was twenty years ago.
A. the same B. same as C. the same as D. the same like
26. Nowadays people hours sitting in front of computers.
A. spend B. last C. set D. take
27. I think you should take up swimming it is suitable for your health condition.
A. so B. because C. although D. but
28. My family enjoys because we can sell vegetables and flowers money.
A. garden - to B. gardening - for C. gardening - with D. garden - of
29. If your hobby is greeting card making, you can give your to your friends as presents.
A. hobby B. money C. greetings D. products
30. My sister’s hobby is sewing, and she can get the sewing patterns from the magazines.
A. fashion B. cooking C. sports D. science
31. After working in computer for long hours, you should your eyes and relax.
A. wake B. rest C. sleep D. sleep in
32. Eat less high-fat foods to keep you from fat.
A. gaining B. reducing C. getting D. rising
33. We should follow the advice from doctors and health in order to keep fit.
A. managers B. experts C. people D. workers
34. Have a healthy and you can enjoy your life.
A. lifeline B. lively C. lives D. lifestyle
35. They go swims outside even when it’s cold.
A. swim B. swiming C. swimming D. swam
36. He ate a lot of fried food so he fat quickly.
A. get B. got C. gets D. will get
37. The Japanese eat a lot offish and healthy food, they live for a long time.
A. so B. because C. or D. but
38. Lan English for more than a year but she can speak it very well.
A. learns B. learn C. learned D. has learned
39. You should watch less TV because looking at screens in a long time your eyes.
A. hurt B. hurts C. is hurting D. to hurt
40. Go Green people to recycle rubbish, such as glass, cans and paper.
A. to encourage B. encourage C. encouraged D. has encouraged
41. Water puppetry in the 11th century in the villages of the Red River Delta of North Viet Nam.
A. originated B. formed C. started D. began
42. The puppet shows present themes of Vietnamese villages.
A. city B. urban C. village D. rural
43. No one in my class is beautiful her.
A. as – as B. more - as C. as - than D. the - more
44. The group is for their albums and tours around the world.
A. well-knows B. know-how C. well-prepared D. well-known
45. Going by train isn’t convenient as going by car.
A. so B. as C. more D. A & B are correct.
46. ? - There’s some meat and some rice.
A. What’s for lunch? B. What’s lunch?
C. What’s lunch for? D. Where’s lunch for?
47. Coffee is .
A. favourite my drink B. my favourite drink
C. drink my favourite D. my drink favourite
48. What would you like? - .
A. I like some apple juice. B. I’d like any apple juice.
C. I’d like some apple juice. D. I’d like an apple juice.
49. My hobby is .
A. cooking B. cook C. to cooking D. cooked
50. We hate the dishes.
A. wash B. to washing C. washed D. washing
51. There isn’t for dinner, so I have to go to the market.
A. any left B. any leaving C. some leaving D. some left
52. A is a small meal that you eat when you are in a hurry.
A. snack B. fast food C. breakfast D. lunch
53. is hot food that is quick to cook, and is served very quickly in a restaurant.
A. Hot food B. Fast food C. Sandwiches D. Roasted duck
54. water should I put into the glass?
A. How B. How much C. How many D. What
55. tomatoes do you need to make the sauce?
A. How much B. How long C. How many D. How often
56. bottles of milk does your family need for a week?
A. How much B. How many C. How D. How often
57. How many do you want?
A. orange juice B. bottle of orange juice
C. jar of orange juice D. cartons of orange juice
58. Is there any butter in the refrigerator?
A. leave B. to leave C. leaving D. left
59. There is tofu, but there aren’t sandwiches.
ơA. some-some B. any-any C. some-any D. any-some
60. How many do you need?
A. cartons of yogurt B. packet of yogurt
C. carton of yogurt D. yogurt
61. Can you tell me this dish?
A. to cook B. how to cook C. cooking D. how to cooking
62. What do I need to cook an omelette?
A. food B. material C. menu D. ingredients
63. In Viet Nam, spring rolls are served at a family gathering or anniversary dinner.
A. most B. almost C. most of D. mostly
64. “What is your dish for breakfast? - “It’s beef noodle soup”
A. favourite B. most C. best D. liking
65. How many do you eat every day?
A. orange B. milk C. apple D. apples
66. Her hobbies are……………….photos and making pottery.
A. making B. taking C. doing D. drawing
67. A……………….is the person who is so funny and makes people laugh happily.
A. writer B. singer C. comedian D. artist
68. The play will start at the……………….time as yesterday.
A. same B. too C. either D. like
69. I can’t play any musical instruments. – I can’t,……………….
A. too B. either C. so D. neither
70. He has been famous for 3 years,……………….he can earn lots of money.
A. so B. because C. and D. but
71.He has written so many pieces of music. He is a well-known……………….
A. writer B. poet C. comedian D. musician
72. My younger sister has a very……………….character from me.
A. different B. as C. same D. like
73. You can eat………………. much……………….you like.
A. as/from B. as/ as C. the same/as D. different/from
74. We will go to the theatre, and they will go there……………….
A. so B. too C. either D. neither
75. Mozart was one of the most famous……………….of classical music.
A. makers B. workers C. composers D. actors
Choose the letter A, B, C or D to complete the sentencesQuestion 1. Look! He ________ football now.A. is playing B. plays C. played D. was playing Question 2. It’s very ________ of you to help me.A. talkative B. active C. nice D. confident Question 3. Nam and Ba ________ ice cream at the moment.A. eating B. is eating C. was eating ...
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Choose the letter A, B, C or D to complete the sentences
Question 1. Look! He ________ football now.
A. is playing B. plays C. played D. was playing
Question 2. It’s very ________ of you to help me.
A. talkative B. active C. nice D. confident
Question 3. Nam and Ba ________ ice cream at the moment.
A. eating B. is eating C. was eating D. are eating
Question 4. Steve can deal with difficult exercises. He’s a __________ boy.
A. creative B. intelligent C. sporty D. kind
Question 5. Please be ___________ when you have to use fire to cook.
A. handsome B. clever C. careful D. reliable
Question 6. She is so ___________ that she doesn’t talk much to strangers.
A. reserved B. clever C. active D. smart
Question 7. The part between the head and the body is the _________.
A. leg B. neck C. knee D. shoulder
Question 8. My friend, Lan is a ________ student. She always finishes homework on time.
A. hard-working B. confident C. shy D. reliable
Question 9. What does your best friend look like?
A. He is funny B. He is kind C. He is clever D. He is handsome
Question 10. What’s your classmate like?
A. She’s patient B. She’s beautiful C. She’s tall D. She’s thin
Question 11. Peter __________ a straight nose and fair skin.
A. goes B. comes C. does D. has
Question 12. Would you like _________ to the hospital to visit my mother?
A. to go B. going C. go D. will go
Question 13. _______ you _______ an English class tomorrow?
A. Do – have B. Are – having C. Will – having D. Is – have
Question 14. That girl has yellow hair. She has _______ hair.
A. black B. wavy C. blonde D. curly
Question 15. We should brush our ____________ twice a day.
A. feet B. teeth C. hair D. toe
Question 1. Look! He ________ football now.
A. is playing B. plays C. played D. was playing
Question 2. It’s very ________ of you to help me.
A. talkative B. active C. nice D. confident
Question 3. Nam and Ba ________ ice cream at the moment.
A. eating B. is eating C. was eating D. are eating
Question 4. Steve can deal with difficult exercises. He’s a __________ boy.
A. creative B. intelligent C. sporty D. kind
Question 5. Please be ___________ when you have to use fire to cook.
A. handsome B. clever C. careful D. reliable
Question 6. She is so ___________ that she doesn’t talk much to strangers.
A. reserved B. clever C. active D. smart
Question 7. The part between the head and the body is the _________.
A. leg B. neck C. knee D. shoulder
Question 8. My friend, Lan is a ________ student. She always finishes homework on time.
A. hard-working B. confident C. shy D. reliable
Question 9. What does your best friend look like?
A. He is funny B. He is kind C. He is clever D. He is handsome
Question 10. What’s your classmate like?
A. She’s patient B. She’s beautiful C. She’s tall D. She’s thin
Question 11. Peter __________ a straight nose and fair skin.
A. goes B. comes C. does D. has
Question 12. Would you like _________ to the hospital to visit my mother?
A. to go B. going C. go D. will go
Question 13. _______ you _______ an English class tomorrow?
A. Do – have B. Are – having C. Will – having D. Is – have
Question 14. That girl has yellow hair. She has _______ hair.
A. black B. wavy C. blonde D. curly
Question 15. We should brush our ____________ twice a day.
A. feet B. teeth C. hair D. toe
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Choose the letter A, B, C or D to complete the sentences
Question 1. Look! He ________ football now.
A. is playing B. plays C. played D. was playing
Question 2. It’s very ________ of you to help me.
A. talkative B. active C. nice D. confident
Question 3. Nam and Ba ________ ice cream at the moment.
A. eating B. is eating C. was eating D. are eating
Question 4. Steve can deal with difficult exercises. He’s a __________ boy.
A. creative B. intelligent C. sporty D. kind
Question 5. Please be ___________ when you have to use fire to cook.
A. handsome B. clever C. careful D. reliable
Question 6. She is so ___________ that she doesn’t talk much to strangers.
A. reserved B. clever C. active D. smart
Question 7. The part between the head and the body is the _________.
A. leg B. neck C. knee D. shoulder
Question 8. My friend, Lan is a ________ student. She always finishes homework on time.
A. hard-working B. confident C. shy D. reliable
Question 9. What does your best friend look like?
A. He is funny B. He is kind C. He is clever D. He is handsome
Question 10. What’s your classmate like?
A. She’s patient B. She’s beautiful C. She’s tall D. She’s thin
Question 11. Peter __________ a straight nose and fair skin.
A. goes B. comes C. does D. has
Question 12. Would you like _________ to the hospital to visit my mother?
A. to go B. going C. go D. will go
Question 13. _______ you _______ an English class tomorrow?
A. Do – have B. Are – having C. Will – having D. Is – have
Question 14. That girl has yellow hair. She has _______ hair.
A. black B. wavy C. blonde D. curly
Question 15. We should brush our ____________ twice a day.
A. feet B. teeth C. hair D. toe
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Choose the letter A, B, C or D to complete the sentences
Question 1. Look! He ________ football now.
A. is playing B. plays C. played D. was playing
Question 2. It’s very ________ of you to help me.
A. talkative B. active C. nice D. confident
Question 3. Nam and Ba ________ ice cream at the moment.
A. eating B. is eating C. was eating D. are eating
Question 4. Steve can deal with difficult exercises. He’s a __________ boy.
A. creative B. intelligent C. sporty D. kind
Question 5. Please be ___________ when you have to use fire to cook.
A. handsome B. clever C. careful D. reliable
Question 6. She is so ___________ that she doesn’t talk much to strangers.
A. reserved B. clever C. active D. smart
Question 7. The part between the head and the body is the _________.
A. leg B. neck C. knee D. shoulder
Question 8. My friend, Lan is a ________ student. She always finishes homework on time.
A. hard-working B. confident C. shy D. reliable
Question 9. What does your best friend look like?
A. He is funny B. He is kind C. He is clever D. He is handsome
Question 10. What’s your classmate like?
A. She’s patient B. She’s beautiful C. She’s tall D. She’s thin
Question 11. Peter __________ a straight nose and fair skin.
A. goes B. comes C. does D. has
Question 12. Would you like _________ to the hospital to visit my mother?
A. to go B. going C. go D. will go
Question 13. _______ you _______ an English class tomorrow?
A. Do – have B. Are – having C. Will – having D. Is – have
Question 14. That girl has yellow hair. She has _______ hair.
A. black B. wavy C. blonde D. curly
Question 15. We should brush our ____________ twice a day.
A. feet B. teeth C. hair D. toe
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REWRITE:1. My brother and I dont like playing video games.- I dont like _____________________________2. Drinking lots of water and fruit juices everyday is good for you- Its ______________________________________________3.Did Lan help her parents on the farm- Lan__________________________4.Hoa and Minh will go to the zoo next week- Hoa will___________________________5.Noone helped us do the math homework-We did___________________________6. Eating habits in Japan are different from France- Eating...
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REWRITE:
1. My brother and I don't like playing video games.
-> I don't like _____________________________
2. Drinking lots of water and fruit juices everyday is good for you
-> It's ______________________________________________
3.Did Lan help her parents on the farm
-> Lan__________________________
4.Hoa and Minh will go to the zoo next week
-> Hoa will___________________________
5.Noone helped us do the math homework
->We did___________________________
6. Eating habits in Japan are different from France
-> Eating habits in France are not _____________
1. My brother and I don't like playing video games.
-> I don't like __playing video games and neither does my brother__
2. Drinking lots of water and fruit juices everyday is good for you
-> It's ____good for you to drink lots of water and fruit juices everyday___
3.Did Lan help her parents on the farm
-> Lan_____helped her parents on the farm, didn't she?___
4.Hoa and Minh will go to the zoo next week
-> Hoa will____go to the zoo next week and so does Minh___
5.Noone helped us do the math homework
->We did___the math homework by ourselves
6. Eating habits in Japan are different from France
-> Eating habits in France are not __the same as in Japan_
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1 I don't likeplaying video games and neither does my brothe
2 It's good for you to drink lots of water and fruit juices everyday
3 Lanhelped her parents on the farm, didn't she?
4 Hoa willgo to the zoo next week and so does Minh
5 We didthe math homework by ourselves
6 Eating habits in France are not the same as in Japan
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Exercise 1: Use the right form of the verbs with each adverb of frequency: 1. Mr Tung, our English teacher (never/ be)____________________ late for lessons. 2. He (often/ clean)____________________ his bedroom at the weekend. 3. My sister (never/ help)____________________ me with my homework. 4. I (sometimes/ be)____________________ bored in the Maths lessons. 5. We (rarely/ watch)____________________ football on TV. 6. Tony (never/ play)____________________ computer games with me. 7. We (usuall...
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Exercise 1: Use the right form of the verbs with each adverb of frequency: 1. Mr Tung, our English teacher (never/ be)____________________ late for lessons. 2. He (often/ clean)____________________ his bedroom at the weekend. 3. My sister (never/ help)____________________ me with my homework. 4. I (sometimes/ be)____________________ bored in the Maths lessons. 5. We (rarely/ watch)____________________ football on TV. 6. Tony (never/ play)____________________ computer games with me. 7. We (usually/ be)____________________ at the sports centre on Sunday. 8. The school bus (always/ arrive)____________________ at half past eight.
1. Mr Tung, our English teacher (never/ be)________is never____________ late for lessons.
2. He (often/ clean)_________often cleans___________ his bedroom at the weekend.
3. My sister (never/ help)_____________never helps_______ me with my homework.
4. I (sometimes/ be)__________am sometimes__________ bored in the Maths lessons.
5. We (rarely/ watch)___________rarely wath_________ football on TV.
6. Tony (never/ play)______never plays______________ computer games with me.
7. We (usually/ be)_________are usually___________ at the sports centre on Sunday.
8. The school bus (always/ arrive)_________always arrives___________ at half past eight.
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