A)Tìm  điều kiện của x để A có nghĩa

B)Rút Gọn A

C)Tìm Giá Trị Nhỏ Nhất Của A

Theo bạn, nguyên nhân nào có tính chất cơ bản nhất góp phần vào sự phát triển “thần kỳ” của nền kinh tế Nhật Bản ? Vì sao ?

Nêu những nguyên nhân dẫn đến sự phát triển “thần kỳ” trong nền kinh tế Nhật Bản trong những năm 1960 – 1990?

11. They pay designers a lot of money. ​Designers_________________________________________________________ 12. When did they decorate your kitchen ? ​When ____________________________________________________________ 13. We have to test these products. These ____________________________________________________________ 14. How do people pronounce this word ? ​How______________________________________________________________ 15. The police will tow away cars left here. ​Cars ________________________________________________________________ 16. They have postpone the concert. The concert _________________________________________________________ 17. They are going to build a new supermarket next year. ​A new supermarket ____________________________________________________ 18. Has your father repaired the car ? ​Has_______________________________________________________________ 19. They export bananas to Europe . ​Bananas___________________________________________________________ 20. People advised us not to go out alone. ​We___________________________________________________________ 21. My parents never make me work hard. ​I _____________________________________________________________ 22. One of my neighbors has stolen my bike. ​My bike _______________________________________________________ 23. My brother will give me a cat for my birthday. ​A cat_____________________________________________________

1.The mechanic has repaired the machines. 

​The machines________________________________________________ 

2. Susan has just finished the work.

 ​The work____________________________________________________

3.The librarian put the reference books on the shelf. 

 ​The reference books____________________________________________

4. He read that novel last night. 

  ​That novel__________________________________________________

5. Binh finds a lot of money on the table. 

  ​A lot of money_______________________________________________

6. They are going to build a new hospital next month. 

  ​A new hospital________________________________________________

7 Ba said:” Why don’t we stop eating chicken to avoid being infected with bird flu?”

  ​Ba suggested that chicken shouldn’t________________________________

8. You can make payment at any post office.

 ​Payment________________________________________________________

9. They cancelled all flights because of fog.

 ​All fights_________________________________________________________

10. Bill is using the computer at the moment.

​ The computer______________________________________________________

18. When did you start working in that factory ?
​How long________________________________________________________

19. She started to give up smoking last year.

She____________________________________________________________

20. They have learnt English for ten years .

​They started _______________________________________________________

21. An and Ba have worked in that factory since 1990. ​

An and Ba started __________________________________________________

22. I haven’t written to you for a month. ​

I last____________________________________________________________
23. How long have you learned French ? ​

How long ago_____________________________________________________ 24. When did you start to listen to Pop music ?

How long__________________________________________________
25. The last time I ate fish was ten years ago. ​

I haven’t___________________________________________________
26. The last time I played football was in 1970.
I haven’t_____________________________________________________
27. The last time Lucy wore that dress was at Mary’s wedding.

​Lucy hasn’t__________________________________________________

khi cho lai đậu hà lan thuần chủng hạt vàng với hạt xanh thu được F1 100% cây cho hạt vàng.Nếu cho các cây F1 lai với nhau dựa theo cơ sở nghiên cứu của Menden em cho biết F2 sẽ cho ra cây đậu hà lan màu hạt như thế nào và tỉ lệ bao nhiêu?

Một dây nhôm có điện trở 10  và có tiết diện 1,4 mm2 . Tính chiều dài của dây nhôm này. Biết điện trở suất của nhôm là 2,8.10-8 Ω.m

2.Một dây điện trở bằng constantan có điện trở suất 0,50.10-6 Ω.m, tiết diện 0,1 mm2 , dài 2 m. Tính điện trở của dây.