Mát-xcơ-va là trung tâm kinh tế, chính trị, khoa học, du lịch của vùng

A. U-ran.

B. Viễn Đông. 

C. Trung tâm đất đen.

D. Trung ương.

Choose the letter A, B, C or D to answer these following questions

Machu Picchu is one of the seven wonders of the world. It is located in the Cusco Region of Machupicchu District, Peru. The Inca emperor Pachacuti built Machu Picchu as an estate around the year 1450. In the beginning, the site developed as a city. But then it was abandoned a century during the Spanish Conquest. The American explorer Hiram Bingham discovered it in 1911. Machu Picchu is a great representation of the Incan way of life. It attracts explorers all over the world every year.

Question:When was Machu Picchu built?

A. 1450

B. 1800

C. 1911

D. 2000

Nồng độ phần trăm của dung dịch NaOH và H 2 S O 4 để thay đổi độ pH?

A. 0,1%

B. 0,2%

C. 0,3%

D. 0,4%

Kim ngưu. 12 tuổi

Rearrange the sentences to make meaningful sentences

Question : Joey sings beautifully so a lot of friends admire and love her.

A. Joey is an beautiful singer so a lot of friends admire and love her.

B. Because Joey sings beautifully so a lot of friends admire and love her.

C. Joey is admired and loved by a lot of friends because of she sings beautifully.

D. Joey is a beautiful singer so a lot of friends admire and love her.

Cho phản ứng hạt nhân 0 1 n + 92 235 U → 39 95 Y + 53 138 I + 3 0 1 n .  Đây là

A. phản ứng nhiệt hạch

B. phóng xạ γ

C. phóng xạ α

D. phản ứng phân hạch