27

Câu 4: Biết rằng y tỉ lệ thuận với x theo hệ số tỉ lệ là  2 và x tỉ lệ thuận với z theo

hệ số tỉ lệ là \(\dfrac{1}{3}\). Viết công thức liên hệ giữa y và z, y có tỉ lệ thuận với z không ? hệ số tỉ lệ ?

Đặt câu với các đại từ Thế, sao, bao nhiêu dùng để trỏ chung.

Câu 1.Write the correct tense or form of the verbs in brackets.

1. I ................ (already/ read) that book. It’s fantastic.

2. We ................ (not do) any volunteer work five years ago.

3. James ................ (do) lots of volunteer work when he was in high school.

4. I think people ................ (eat) more healthy food in the future.

5. People ................ (need) about 2,000 calories a day to stay in shape.

6. ................ (Mary/ ever/ be) to England ?

- Yes, She ................ (be) to Seattle once.

7. Margaret usually ................ (have) a shower after school.

8. Be a Buddy ................ (establish) in 2011.

9. We love (listen) ................to pop music.

10. My mother enjoys ................ (do) charitable work.

Câu 1. Complete the sentences with too or either.

1. I don’t really like tomatoes. My brother .................

2. My sister enjoys Korean movies, and she .................

3. He didn’t say anything, and I .................

4. I don’t speak French and Sarah .................

5. Danny is really tired and I .................

6. They don’t like Rock and Roll music, and we .................

7. French is a difficult language to learn. Latin .................

8.Helen’s got a lovely voice, and she .................

3^x+3^x+1=108

chứng minh rằng "nếu hai góc nhọn xOy và x'O'y'có Ox//O'x'; Oy//O'y' thì xOy = x'O'y' (O' nằm trong góc xOy )