phân số ứng với số hs nam là

   1/3=1x5/3x5=5/15

phân số ứng với hs nữ là

   2/5=2x3/5x3=6/15

vậy 5/15 hs nam=6/15 hs nữ nên nam 5 phần, nữ 6 phần

ta có sơ đồ

nam l-----l-----l-----l-----l-----l

nữ   l-----l-----l-----l-----l-----l-----l

tổng số phần bằng nhau là:

     5+6=11 (phần)

Số hs nam là:

     33 : 11 x 5 = 15 ( hs )

Số hs nữ là 

     33 - 15 = 18 ( hs )

             Đáp số : nam : 15 hs

                          nữ    : 18 hs

My school is in Thai Binh city. It is located in the center of the city. Its name is Luong The Vinh school.

My school is very comfortable. It has three floors. There are many classes. In each class, there are a lot of things. The classroom is full of tables and benches, books, tables. There are 30-40 students in each class.

My school has many trees. There are twenty trees in front of my school. Behind my school, there is Red river. At recess, students are under the tree play many games. Their favourite games is hide-and-seek. It is very interesting.

My school is very amazing. I love it so much.

tự dưng bị lq :v

1.

(-) Thu doesn't have any bread for breakfast.

(?) Does Thu have any bread for breakfast?

2.

(-) They don't like apples and oranges.

(?) Do they like apples and oranges?

3.

(-) My mother doesn't want a hot drink.

(?) Does your mother want a hot drink?

4.

(-) There isn't any milk in the bottle.

(?) Is there any milk in the bottle?

5.

(-) There aren't any onions in the fridge.

(?) Are there any onions in the fridge?

6.

(-) I wouldn't like noodles

(?) Would you like some noodles?

11. friendly

12. police man - teacher

13. comfortable

14. information

15. different

16. nationality

17. activities

18. useful

19. player

20. sporty

Cơ thể bình thường có gen tiền ung thư, nhưng gen này không phiên mã nên cơ thể không bị bệnh này. Khi gen tiền ung thư bị đột biến thành gen ung thư thì cơ thể sẽ bị bệnh. Gen tiền ung thư bị đột biến ở vùng nào sau đây?

A. vùng mã hóa.

B. vùng bất kì.

C. vùng kết thúc.

D. vùng điều hòa.

vào cái này :  http://olm.vn/hoi-dap/tag/Ph%C6%B0%C6%A1ng-tr%C3%ACnh.htm

tick mot ngay mot cai nhe

Và đây là bài làm của t, @Đức Minh thấy sai câu nào thì nói nhé:

A - TRẮC NGHIỆM

Câu 1: B

Câu 2: A

Câu 3: B

Câu 4: C

Câu 5: D

Câu 6: D

Câu 7: C

Câu 8: A

Câu 9: C

Câu 10: A

B - TỰ LUẬN

Câu 1: What is the content of the passage?

Câu 2: I'm possible to lift that box.

Câu 3: Tell me why you are so sad.

Câu 4: My father is a fifty - year old doctor.

Câu 5: After having done his homework, he went to bed.

Câu 6: She promised that she would visit me the next day.

Câu 7: I'm accu stomed to going to school early.

Câu 8: If you had taken your advice in the first place, I wouldn't have been sorry.

Câu 9: We can't afford to buy that house.

Câu 10: I haven't visited that city for ten years.