1. a,b,c > 0. Thỏa mãn ab+bc+ca=9abc

Tìm GTNN

A=\(\frac{1}{2a+3b-c}+\frac{1}{2b+3c-a}+\frac{1}{2c+3a-b}\)

(Nhớ áp dụng BĐT B.C.S(Bunhiacopxki) dạng phân thức nha mọi người)

Theo em ngày nay các nước trên thế giới cần làm gì để không xảy ra chiến tranh thế giói thứ ba?

Relationships in Vietnamese family are more complicated than those of Western countries. The majority of families in Vietnam are extended families as many generations co-live to take care of each other. Family in Vietnam looks similar to a system of mini society with the most elderly having the strongest voice and taking charge of most activities in house. Each family has its own rules and values that members are supposed to conform with. The younger generation shows respect for the older generation and vice versa, the old generation tolerates the young. In the relationships between parents and children, and between husband and wife as well, traditional Vietnamese retain much of their long established customs and values. Traditional Vietnamese meal - dining on the floor with the whole extended family Although influenced by Chinese culture and Confucianism, in the eyes of children, Vietnamese mothers still have the same status as their counterparts. They are the embodiments of love, of self-denial and of sacrifice. For Vietnamese parents, their children are their most valuable assets; therefore, within their financial capacity, most of them are eager to have as many children as they can.

1 Why are families in Vietnam extended families?

2 What happens between generations inVietnamese families?

3 How was a woman demanded before?

4 By what were Vietnamese woman affected?

5 Why now can we say "Men make houses and women make home"?

1..........dance is my favourite traditional dance, because it shows the beauty of vietnam

a. roses b lotus c daisy d lys

2I don't want to live in the countryside. Everything is very slow and....

A. busy B. narrow c. boring d. tired

3Everyone in both cars....injured in the accident last night,.....?

A were-weren't they B. was-weren't they

c was-wasn't he? D were-were they

4So Dua, Tam Cam are the.....folk tales in VN

A most popular

B more popular

c better

d worst

5She .......water the flowers in the garden

a has to

b shouldn't

c have to

d must to

11 Each peoples inVN has their own traditional....

A clothing b cloths c costumes d dress

12 my mother is used to.....my sister fairy tales or folk tales every night

a tell

b telling

c told

d having told

13 Lan explained to us....get to the library

a how b how could c how we could d how could we

14 he's always trying .......me

a to avoid to meet

b avoiding meeting

c to avoid meeting

d avoiding to meet

15 mr phong ........at TL secondary school from 1910 ti 2010

a had taught

b has taught

c had been teaching

d taught

I. Mẫu câu: so…… that……; such…….. that…..; too…… to……

1. The furniture was so expensive that I didn’t buy it.

-> The furniture was too …….

2. The lesson was very difficult. No one could understand it.

-> It was such ………

3. Nobody could move the piano. It was too heavy.

-> The piano was so ……

4. The boy couldn’t eat the cake because it was very hot.

-> the cake ……….

5. The question was so difficult that we couldn’t answer it .

-> The …………..

6. The street are so crowded that he can’t drive quickly

.->The streets ………..

7. He was driving very fast, so he couldn’t stop.

-> he was driving so ……….

8. The test was so easy that every student could finish it

.-> It was ………….

9. Most of the students couldn’t finish the test because it was so difficult.

-> it was ………..

10. The coffee was too hot for him to drink.

-> The coffee……………..

I’m too weak to carry this box.

-> this box …………..

The test was so difficult that no pupil could finish it

. -> It was …………

They are lazy boys. They are always punished.

-> The boys are so ………..

The news is so wonderful that we decided to have a party.

-> It’s ………..

It is very cold. We can’t go out.

-> It is too ………….

My fiend is too sick. He can’t go to school.

-> My friend is so ……………

Lan was very busy.. she couldn’t go to the movies with us .

-> Lan was so …….

Mr. Pike drank too much wine. He got sick

.-> Mr. pike ………….

She is quite poor. She can’t buy a bicycle.

-> she is ………..

Jim was too young to go to school alone.

-> Jim was so ………

The children are too noisy for me to work.

-> The children are so ………….

Thì hiện tại hoàn thành; khoảng thời gian; mốc thời gian; câu bình phẩm
The last time I saw John was in 1999.-> I haven’t …………..
I’ve never met a more intelligent boy than Peter. -> Peter is …….
We last met our old teacher 10 years ago.-> We haven’t …………
I started learning French 6 moths ago. -> I’ve……….
I’ve never been to London before.-> It’s the first …………..
The last time I played football was in July.-> I haven’t …………
He has collected stamps for five years. -> He started ………….
He is the most famous actor I’ve ever seen. -> I’ve ……..
He started working for this factory a year ago. ->He’s ……….
She left university two years ago. ->He’s ………………..
I haven’t heard him since August. -> The last time ……………
My father hasn’t been to Dalat for three years. ->The last time ……
My grand father hasn’t been to hospital before.-> This is the first time ….
They last visited me 5 years ago. -> They haven’t ……………
Jim will be 18 next week. -> It is Jim’s …………..
This is the most delicious cake I’ve ever tasted. -> I’ve …………
I haven’t seen my grand parents for one month.-> It’s ……….
I haven’t eaten this kind of food for two years. -> It is ………….
This story is more interesting than any story that I’ve ever read. -> This is ….
Peter began playing tennis three years ago. -> Peter has ……….
I’ve never read a more interesting novel than this. -> This is …….
We’ve never met a prettier than Lan. -> Lan is ……………..
We haven’t seen her for two years.-> We last ……….
We started cooking for the party 4 hours ago. -> We have ……….

Mât bao lâu để làm viêc gì
She typed the letter in 20 minutes. -> It ……………..
He had breakfast in about ten minutes. -> It ………..
Nam spends two hours a day doing his home work. -> it ………
He read the book in two weeks.-> It ……………
The students will do this test in 45 minutes. -> It ……………
We learn this after a long time. -> It’s …………………..
The flight to HCM city lasted two hours. -> It ……………..
She found the bill in several seconds. -> It …………
I had to spend two hours to finish my home work. -> It…………..
The doctor examined the patient in over 20minuter.

tam giác ABC có góc A = 60 , góc B>A vẽ tam giác đều MBC sao cho M,A cùng thuộc một nửa mặt phẳng bờ bc trên cạnh AC lấy N sao cho AN=AB

chứng minh : a, ^ABM=^MBC

b, AC là tia phân giác của goc BAM