một vật ném thẳng đứng lên cao từ mặt đất với vận tốc 4m/s . lấy g=10m/s2 . tính động năng của vật sau 12s

Tại sao chuẩn UTF-8 được dùng thay thế tiêu chuẩn mã hóa ký tự ASCII?

A. UTF-8 chỉ sử dụng 128 giá trị.

B. ASCII không thể biểu diễn biểu tượng cảm xúc.

C. UTF-8 có thể lưu trữ một ký tự trong nhiều hơn một byte.

D. ASCII có thể lưu trữ một ký tự trong nhiều hơn một byte.

Giải thích + Giải

Giá trị sử dụng của hàng hóa không phải do thuộc tính của xã hội đúng hay sai.

Cho tam thức bậc hai f(x)=3x^2-6(2m+1)x+12m+5

Tìm m để phương trình có nghiệm

1. Revolution

2. Sun

3.Jupiter

4. Saturn

5.Comets

6. Mars

7.Moon

8. Reflection

9. Star

10.Eclipse

The Voice has been and is a remarkable phenomenon in our country’s entertainment and cultural activities. This is also my favorite TV show.

The Voice is a program that discovers many singing talents of the country. This TV show is usually aired weekly on channel VTV3 at 9 pm. The coaches of the program are talented and famous singers and musicians in Vietnam such as Thu Minh, Ho Hoai Anh, Luu Huong Giang…

The Voice is a singing contest on television, first held in 2012. This music contest consists of four rounds: Blind Audition, Battle Round, Cross Battle Round, and Liveshow. In the  Blind Audition, the contestants will show their singing talent to conquer the examination board. The judges will sit with their backs to candidates and choose based on their abilities. In the Battle Round, the competitors in a team will be divided into pairs and eliminated by one person. Each coach saved 2 members who were eliminated from the other team. At the end of this round, each team will have 7 members. In the Cross Battle Round, the coaches will challenge each other. Two contestants of the two teams sing the solo and the audience will be the one who decides who can go on. In the Liveshow, the contestants will perform their talent live on stage. Results are based on audience votes. The people ​​with the most votes will be the winner.

I’m a music fan so I really like this TV show. Also, when watching, I better understand how to sing a song, see the hard work of the contestants. I really like The Voice show.

I’m Nam, I’m 15 years old. My favorite sport is swimming. I can go swimming in both summer and winter. Normally, I would go swimming for two days a week on Wednesdays and Sundays. I often go swimming with my best friend. He will wait for me after school. Then starts to go to the swimming pool. I learned to swim when I was 10 years old. Swimming helps me feel better. Thanks to learning how to swim since childhood, I am quite tall. I am very proud of that. Swimming sometimes helps me forget about the bad things. I often participate in swimming club competitions. I hope to grow up to become a professional swimmer.

Everyone is different, so they don't have a similar sport. For me, I love to play ping-pong because it can improve my eyes and make me feel fresh when I play that. Scientists believe that doing more sport can help you last longer. I think I might continue this sport. It's my favorite sport, either

Everyone is different, so they don't have similar sport. For me, I love play pingpong because it can improve my eyes and make me feel fresh when I play that. Scentist believe that doing more sport can help you last longer. I think I might be continue this sport. It's my favourite sport, either