Tập xác định của hàm số  y = 1 1 log 1 3 x 2 - 4 x + 6 + 1 2

A.  D = - ∞ ; 2 - 2 ∪ 2 + 2 ; + ∞

B.  D = - ∞ ; 2 - 2

C.  D = 2 + 2 ; + ∞

D.  D = 2 ; + ∞

Tìm câu kể "Ai là gì?" và nêu tác dụng của mỗi câu (dùng để giới thiệu hay nhận định) SGK TV4 tập 2 trang 78.

Read the passage and answer the questions

This is my close friend, Marry. She is fourteen years old. She lives at 25 Washington street with her parents and her brother, Henry. She is tall and rather fat with long curly dark hair. Marry is sociable, generous and kind. Mai has a lovely smile. She is very sporty. She spends most of her free time playing sports. She is a volleyball star of our school. I love playing volleyball with her.

How old is Marry?