cho tam giác ABC các đường cao h\(_a\), h\(_{_{ }b}\), h\(_c\) thoa man he thuc 3h\(_a\) = 2h\(_b\) + h\(_c\) . Tim he thuc giua a, b, c
A.\(\dfrac{3}{a}=\dfrac{2}{b}-\dfrac{1}{c}\) B. \(3a=2b+c\) C.\(3a=2b-c\) D.\(\dfrac{3}{a}=\dfrac{2}{b}+\dfrac{1}{c}\)
III.Use the suggested words to make a complete sentences.
1. The last time / I / play / football / in 1998.
2. My parents / encourage / me / take part in / outdoor activities.
3. Two / different / teacher / mark / exams.
4. She / behave / as if / she / more important / everyone else.
5. He / describe / as / best player / the world.
6. They / decide / find out / who / can / run / fastest.
7. The room / not be / dirty / so / they / not need / clean it.
8. I / not take /my passport / me / because / an identity card / enough.
9. The price / the holiday / depend / when you /want / travel.
10. Those mountains / can / see / from / a great distance.
II. Finish the second sentences so that it has the same meaning as the first
1. I'm pleased to attend your \(^{25^{ }th}\) wedding anniversary.
I'm looking ...............................................................
2. Eating with chopsticks feels strange to Mr. Pitt
Mr. Pitt is not used ....................................................
3. We are on the point of organizing a surprise party for Paul.
We'er about.................................................................
4. He made an effort to reach the station on time.
He tried ....................................................................
5. I don't intend to invite Tom to my birthday party.
I have no ..............................................................
6. "You stole the jewels" the inspector said to him.
The inspector accused ............................................
7. Nga was sure there was no wistake in her homwork.
Nha was sure ...........................................................
8. I would do any thing for you.
There's .....................................................................
9. That girl's father used to work with mine.
That's the girl ...................................................
10. his sister is living in hanoi and his cousin is, too.
Not only ..........................................................
I. complete the following sentences by giving the correct form of the words in the blanks.
1 What a ........boy ! (DESTROY)
2. How .........this man is (DANGER)
3. There are many people living in ........(POOR)
4. He feels a great deal of .......for the way he behaved (ASHAMED)
5. We are selling these toys at a very ......price (COMPETE)
6. Iam just a beginner in ......... with you. (COMPARE)