Câu 13: Câu nào đúng khi nói về không khí trong các câu sau? A. Không khí là một nguyên tố hoá học B. Không khí là một đơn chất C. Không khí là một hỗn hợp của 2 nguyên tố là oxi và nitơ D. Không khí là hỗn hợp gồm chủ yếu 2 khí là oxi và nitơ

Các câu hỏi liên quan

1. Sarah is ..........................at chemistry than Susan. A. good B. well C. better D. best 2. I don’t work so hard .......................my father. A. so B. as C. than D. more 3. Sam is the ..........................student in my class. A. tall B. most all C. taller D. tallest 4. No one in my class is ..........................beautiful..........................her. A. as/as B. more/as C. as/than D. the/more 5. Going by train isn’t ..........................convenient as going by car. A. so B. as C. more D. A & B are correct 6. The test is not ..........................difficult ..........................it was last month. A. as/as B. so/as C. more/as D. A&B are correct 7. Peter usually drives ..........................Mary A. more fast B. fast than C. faster than D. B&C are correct 8. This film is ..........................interesting than that film. A. most B. less C. as D. so 9. He works ..........................we do. A. harder B. as hard as C. more harder D. so hard as 10. No one in this class is ..........................Jimmy. A. so tall as B. tall than C. the tallest D. more tall than 11. Marie is not ..........................intelligent..........................her sister. A. more/as B. so/so C. so/as D. the/of 12. Janet is ..........................tennis player in the club. A. good B. best C. well D. the best 13. She can speak English ..........................I can. A. more well B. best than C. better than D. better 14. Ann is 18 years old. Sue is 20 years old. Ann is ..........................Sue .A. older than B. younger than C. older D. younger 15. Nobody can cook as ..........................as my mother. A. well B. best C. good D. better làm hộ mình nha