It is English subject that I like best in school. I like English because it helps me open the big world. First of all, I can talk with people who are in the English-speaking world. Secondly, I can find many documents written by English for studuing. Thirdly, I can watch movie and news without subtitle. Last but not least, it makes me interesting when studying. To study it well, I sometimes take a note and past it in somewhere in my room. I always do all exercises before going to school. And I am very enthusiastic in the class. English is known to be very dificult and many students hate studying it. It my feeling that the problem is the methods teaching of Vietnam is not suitable. Student must study grammar hardly. I hope it will change in the future. In short, English is very necessary for modern life, I hope all students find in interesting.

tick tớ đi rồi nói cho

Đề hiđrat hóa ancol X bậc III  thu được hai anken có công thức phân tử là C₅H₁₀. Hãy cho biết anken nào là sản phẩm chính?

A. pent-2-en

B. 3-metylbut-1-en

C. 2-metylbut-2-en

D. 2-metylbut-1-en

Voi có 5 ngón nhưng được xếp vào một bộ riêng là : bộ Voi vì có nhiều đặc điểm khác biệt như trọng lượng cơ thể lớn, có ngà do răng cửa ở hàm trên phát triển, vòi do môi trên và mũi kéo dài tạo thành .