Ông đang khuyên cháu là:

Có công mài sắt có ngày nên kim.

Bạn xem có đúng ko nhé.

Hiện tượng rỉ nhựa và ứ giọt bị ngừng trong trường hợp nào sau đây?

A. Trời quá nóng

B. Trời quá lạnh

C. Trong đất có clorofooc, KCN hoặc đất bị giảm độ thoáng

D. Đất bị thiếu nito

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

Perry had a rough childhood. He was physically and sexually abused growing up, got kicked out of high school, and tried to commit suicide ___(31)___ once as a preteen and again at 22. At 23 he move to Atlanta and took ___(32)___ odd jobs as he started working on his stage career.

In 1992 he wrote, produced, and starred in his first theater ___(33)___, I Know I’ve Been Changed, somewhat informed by his difficult upbringing. Perry put all his savings into the show and it failed miserably; the run lasted just one weekend and only 30 people came to watch. He kept up with the production, working more odd jobs and often slept in his car to get by. Six years later, Perry finally ___(34)___ through when, on its seventh run, the show became a success. He‘s since gone on to have an extremely successful career ___(35)___ a director, writer, and actor. In fact, Perry was named Forbes’ highest paid man in the field

Điền ô số 31

A. up

B. off

C. in  

D. to

vì 3 và 7 là số nguyên tố => k=1

Trong số các chất: Na, Ca, CaO, CuO, CH₃COOH, HCl, số chất tác dụng được với ancol etylic là:

A. 5

B. 4

C. 3

D. 2