Tại sao nước Nga dành độc lập vào tháng 11 năm 1917 mà sao lại gọi là cách mạng tháng 10 Nga?????

Change these sentences into the active voice: (Chuyển các câu sau sang câu chủ động)

1. Oil is obtained from under the ocean by workers.

-> Workers obtain oil from under the ocean.

2. A big house is being built in this garden by the family.

-> The family are building a big house in this garden.

3. The cart was drawn by horses.

-> House drew the cart .

4. They will be helped by that kind woman.

-> That kind woman will help them.

5. Grass is eaten by cows and buffaloes.

-> Cows and buffaloes eat grass.

6. The lesson was explained by the teacher.

-> The teacher explained the lesson.

7. Grammar is taught by Mr. Brown.

-> Mr. Brown taught grammar.

8. A hole was being dug in the garden by him.

-> He was dugging a hole in the garden.

9. Coffee is being made by the maid.

-> The maid is making coffee.

10. The box will be moved away from the window by us.

-> We will move the box away from the window.

11. This tree was plainted by my grandfather.

-> My grandfather planted this tree.

Để khẳng định rằng những người hút thuốc lá rất thờ ơ, vô trách nhiệm.

ab=6 suy ra a=6/b

a+b=b+6/b=(b^2+6)/b=5

suy ra b^2+6=5b

b^2-5b+6=0

suy ra (b-2)(b-3)=0

suy ra b=2; b=3

suy ra a=3; a=2

suy ra a^5+b^5=275

Complete the following sentences with the correct form of the verbs in brackets.

1. Are you free now?-No, I'm busy to tidy the room.

2. It is interesting to join. in the Y&Y group.

3. The youth can participate in different programs such as raising for the poor and planting trees and flowers in the parks.

4. We invited Ann to party, but she didn't want to come

5. I'm trying to finish my work.Please stop talking

6. They were very angry and refused to talk to us

Diễn biến của hệ tuần hoàn kín diễn ra theo trật tự nào

A. Tim – Động mạch – Tĩnh mạch – Mao mạch – Tim 

B. Tim – Tĩnh mạch – Mao mạch – Động mạch – Tim

C. Tim – Động mạch – Mao mạch – Tĩnh mạch – Tim

D. Tim – Tĩnh mạch – Động mạch – Mao mạch– Tim