Many more students tend to ________ in vocational school than in senior secondary schools.

A. endow B. ensure C. enlist D. enroll

Nhập số nguyên dương n, tạo mảng a gồm n phần tử có giá trị tăng dần lần lượt a[1]=1, a[2]=2,…,a[n]=n.

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

Miss. Mai is a famous singer. She is small and thin. She has long black hair and an oval face. She has brown eyes, a small nose and full lips. She is young and beautiful. Because of her busy work, she often leaves home for work very early and comes back home very late. She is willing to work hard to contribute to her fans all over the world.

Which color are her eyes?

A. Black

B. Brown

C. Blue

D. Yellow

Vôi sống có công thức hóa học là

A.  C a

B.  C a ( O H ) 2

C.  C a C O 3

D.  C a O