Dàn ý thoi ạ Chứng minh rằng bảo vệ môi trường thiên nhiên là bảo vệ cuộc sống của con người.

tìm số nguyên x, y

\(\dfrac{2}{x}+\dfrac{3}{y}=1\)

            Every year when April rolls around thousands of people gather at Coachella Valley to attend the annual Coachella Valley Music and Arts Festival. Known as Coachella for short, the festival started in 1999. Festival goers make up mainly of young people from 18 to 25. Being one of the most popular music festivals in America, Coachella is able to invite many famous musical artists to perform at their events. Besides concerts, there are a variety of activities for attendees including art exhibition, singing and dancing contest. Camping is also allowed on the festival grounds. It’s estimated that there are at least 70,000 people attending the festival during weekdays and the number goes up to 90,000 at weekends.

1. When does Coachella take place?

          A. Every April.             B. Every weekday.       C. Every weekend.       D. None is correct.

2. Which of the following are organized at Coachella?

          A. Music performances.                                     B. Art exhibitions.         C. Competitions.     D. All are correct.

3. Which of the following is TRUE about attendees at Coachella?

          A. Most of them are famous musical artists.      B. They cannot camp in the festival area.

          C. Most of them age from 18 to 25.                         D. Only 70,000 people are allowed to join the festival.

4. What does the name “Coachella” refer to?

          A. A valley.                   B. A festival.                 C. Both are correct.       D. None is correct.

5. Which of the following is FALSE about Coachella?

          A. It was first organized in 1999.                       B. It welcomes 90,000 attendees every day.

          C. It is a famous music festival in America.      D. Lots of musical artists are invited to Coachella.

IV. Read the passage and choose the correct answers (A, B, C or D) to fill in the blanks.

            Angelina Jolie is a famous actress who (1) …… in many movies and won several prestigious awards. She is one of the highest paid actresses in Hollywood. Her filmography includes Tomb Raider, Mr. and Mrs. Smith, and Girl, Interrupted, etc. In 2007, she directed her first documentary and her first directed movie (2) … in 2014. Jolie is not only known for her major achievement in the film industry (3) … for her charitable work. She has made many donations to help the less fortunate. (4) .… her status as a Hollywood superstar, Angelina Jolie has also helped bring attention to many important social issues. Her humanitarian work is widely praised and recognized all (5) … the world.

1. A. has starred          B. stars            C. will star                  D. is starring

2. A. woke up              B. rose up        C. ran out off              D. came out

3. A. even if                B. yet              C. not only                  D. but also

4. A. Use                     B. Used           C. Using                      D. To use

5. A. in                        B. over             C. on                           D. above

Câu 6: Phân biệt bộ thú guốc chẵn và thú bộ guốc lẻ ?

Câu 7:  Tại sao thân và đuôi của thằn lằn bóng đuôi dài là động lực chính của sự di chuyển mà không phải là chi trước và chi sau?

Câu 8: Tại sao trong dạ dày cơ của chim, gà thường có các hạt sạn, sỏi?