Chữ viết của người Chăm thế kỉ IV bắt nguồn từ loại chữ nào?

A. chữ Hán.

B. chữ Phạn.

C. chữ La tinh.

D. chữ Nôm.

Biết số liên kết hidro của một gen và số nuclêôtit loại A, công thức nào sau đây có thể tính được số nuclêôtit loại G?

A. G = (H – 2A)/2 

B. G = (H – A)/2 

C. G = (H – 3A)/2 

D. G = (H – 2A)/3

Cho hai số phức z 1 = 1 + 3 i , z 2 ¯ = − 3 + 2 i . Tính  z 1 + z 2

A. 11 − 4 3

B.  11 + 4 3

C.  11 − 2 3

D.  11 + 2 3

Rearrange the sentences to make meaningful sentences

At/ moment/ the, we/ a/ reading/ novel/ are.

A. At the moment, we are reading a novel.

B. At the moment, we are a novel reading

C. At moment the, we are reading a novel.

D. At the moment, we reading are a novel.

Choose the letter A, B, C or D to complete the passage below

Home is place where I feel heaven and my parents are the reason __________ (11) it. We, as a family have spent the best times of life. Only when we are at home, we feel happy. Both my father __________ (12) mother are working. __________ (13), we find time to share our daily experiences. My mother __________ (14) extra care to prepare the most delicious food I like and she is my best friend. My father has always been my best companion and I would say he is my mentor. Without my parents, I __________ (15) what I am today. I love my parents very much and we always wish to be the lovable family as we are now, ever.

Question 15:

A. would have not been

B. would not have been

C. would been have not

D. would been not have

Choose the best answer to complete the sentence. (Em hãy lựa chọn đáp án đúng nhất để hoàn thành câu)

Mount Everest is the highest mountain _______ the world.

A. under 

B. in 

C. at 

D. of