Sụn đầu xương có tác dụng

A. làm cho xương lớn lên về bề ngang.

B. sinh hồng cầu.

C. giảm ma sát.

D. chịu áp lực.

86+14=100

100+357=457 

tick mk nha

Phương trình 2x – 3 = 12 – 3x có bao nhiêu nghiệm?

A. 0                      

B. 1                                           

C. 2 

D. Vô số nghiệm

ak mà tớ quên chưa chia cho 2 đó 24 : 2 =12 (đvdt)

và bài của Minh điểm B(4;-6)

Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.

He became successful as a professional writer at the age of 20.

A. He did not succeed as a professional writer until he was 20.

B. He did not write professionally until he succeeded at the age of 20.

C. He succeeded as a professional writer until he was 20.

D. He wrote professionally until he became successful at the age of 20.